U.S. Electric Company Investment and Innovation in Energy Storage - Leading the Way

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U.S. Electric Company Investment and Innovation in Energy Storage - Leading the Way
June 2021

Leading the Way
U.S. Electric Company
Investment and Innovation
in Energy Storage
U.S. Electric Company Investment and Innovation in Energy Storage - Leading the Way
Leading the Way
U. S . E LEC TRIC COM PANY I NVE STM E NT
A N D I N N O VAT I O N I N E N E R G Y S T O R A G E

Table of Contents

CASE STUDIES                                                CenterPoint Energy
(In alphabetical order by holding company)                  14   Solar Plus Storage Project

AES Corporation                                             Consolidated Edison Company of New York
AES Indiana                                                 15   Commercial Battery Storage
1    Harding Street Station Battery                              (Beyond Behind-the-Meter)
     Energy Storage System                                  16   Gateway Center Mall Battery
                                                            17   Ozone Park Battery
Alliant Energy
                                                            Dominion Energy
2    Decorah Energy Storage Project
3    Marshalltown Solar Garden and Storage                  18   Bath County Pumped Storage Station
4    Sauk City Microgrid
5    Storage System Solar Demonstration Project             DTE Energy
6    Wellman Battery Storage                                19   EV Fast Charging-Plus-Storage Pilot

Ameren Corporation                                          Duke Energy
Ameren Illinois                                             20   Rock Hill Community 9 MW Battery System
7    Thebes Battery Project                                 21   Camp Atterbury Microgrid
                                                            22   Nabb Battery Site
Avangrid
                                                            Edison International
New York State Electric & Gas
                                                            Southern California Edison
8    Aggregated Behind-the-Meter Energy Storage
9    Distribution Circuit Deployed Battery                  23   Alamitos Energy Storage
     Storage System Pilot Project                           24   Ice Bear
                                                            25   John S. Eastwood Pumped Storage Plant
Rochester Gas & Electric Corporation                        26   Mira Loma Substation Battery Storage Project
10   Integrated Electric Vehicle Charging
     & Battery Storage System                               Green Mountain Power
11   Peak Shaving Pilot Project                             27   Essex Solar and Storage Microgrid
                                                            28   Ferrisburgh Solar and Storage Microgrid
Berkshire Hathaway Energy                                   29   Milton Solar and Storage Microgrid
MidAmerican Energy Company
                                                            Hawaiian Electric Companies
12   Knoxville Battery Energy Storage System
                                                            30   Schofield Hawaii Public Purpose Microgrid
PacifiCorp – Rocky Mountain Power
13   Soleil Lofts Virtual Power Plant

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Liberty Utilities                                        Georgia Power Company
California                                               42   Georgia Power Smart Neighborhood
31   Sagehen Microgrid                                   43   Tech Square Microgrid

New Hampshire                                            Unitil Corporation
32   Tesla Powerwall 2 Pilot Program                     44   Virtual Power Plant Pilot Project

National Grid
33   Pulaski, New York Battery Storage System

NextEra Energy
Florida Power & Light Company
34   Wynwood Energy Storage

PPL Corporation
LG&E and KU Energy
35   E.W. Brown Generating Station Energy
     Storage Research and Demonstration Site

Public Service Enterprise Group
Public Service Electric & Gas Company
36   Highland Park Landfill Solar Storage System

Sempra Energy
San Diego Gas & Electric
37   El Cajon Battery Storage Project
38   GRC Energy Storage Program
39   Ramona Air Attack Base
40   Vanadium Redox Battery Storage Pilot Project

Southern Company
Alabama Power Company
41   Energy Storage Research Center

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Introduction
The Edison Electric Institute’s member companies - America’s investor-
owned electric companies - are leading a clean energy transformation
across the country, and they are committed to getting the energy they
provide as clean as they can as fast as they can, without compromising on
the reliability and affordability that customers value.
Energy storage has a critical role to play in this transformation, and the
44 case studies in this compilation offer a glimpse into how EEI’s member
companies are utilizing a variety of energy storage technologies and
ownership structures to deploy energy storage systems in innovative ways
that benefit customers and the energy grid. These projects are integrating
renewable energy resources, improving system reliability by providing grid
stability services, reducing transmission constraints, helping to manage
peak demand, and meeting the unique needs of individual customers.
Electric companies own and operate many different types of energy
storage technologies, including pumped-hydropower, batteries, thermal,
compressed air, and flywheels. While pumped hydropower represents
approximately 86 percent of installed storage capacity in the United
States, battery storage is a key driver of this market today. Investment in
advanced energy storage is growing rapidly, with battery storage capacity
quintupling between 2015 and 2020, expanding from 517 megawatts (MW)
to 2,578 MW. The scalability of storage technologies enables developers
to meet the unique requirements of each project, from a massive battery
system designed to help manage peak demand to a behind-the-meter
solution designed to meet the needs of a single customer.
Electric companies are critical partners for advancing a robust, sustainable
energy storage industry given their unique ability to maximize the value of
energy storage for the benefit of all customers. At the same time, the role
of customers and other third parties also continues to grow, prompting the
diversification of ownership and business models. While laws and regu-
lations vary by state, electric companies are responsible for distribution
system reliability and therefore they should be able to own, procure, and
operate energy storage as a tool to help deliver clean, reliable, resilient,
safe, and affordable electricity to customers.

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       Electric Company Storage Projects
       by Use Case and Business Model

                                                                            T or D
                      Energy         Energy
                                                                           Upgrade                                                                                                                                                                                         Customer
                      Storage       Storage         Business Model                               Wholesale Market Services (Bulk and Ancillary)
                                                                              or                                                                                                                                                                                           Services
                    Technology      Location
                                                                           Deferral

                                                                                                                                                                                                                                       Harmonics, Inertia Response
                                                                                                                                                                                                                                        Black Start, Power Quality/
                                                                                                                                Grid Asset Optimization
                                                                                      Frequency Regulation

                                                                                                                                                                                                                                                                                      Emergency Backup
                                                                                                                                                                                                Variable Resources

                                                                                                                                                                                                                                                                                                         Microgrid Support
                                                                                                             Reserve Capacity

                                                                                                                                                          Spinning Reserve

                                                                                                                                                                             Energy Arbitrage
Table shows

                                                                                                                                                                                                                     Voltage Support

                                                                                                                                                                                                                                                                      Load Shifting
primary and

                                                                                                                                                                                                    Integration
                                                    Operator

                                                                 Owner

secondary use
cases associated
with documented
storage projects

AES Corporation
AES Indiana:
Harding Street
                       Battery:                    Electric     Electric
Station Battery
                     Lithium-ion
                                   Transmission
                                                  Company      Company                   O
Energy Storage
System
Alliant Energy
Decorah Energy         Battery:                     Third       Electric
Storage Project      Lithium-ion
                                   Distribution
                                                    party      Company          O                                                                                              O                     O                 O
Marshalltown
                       Battery:                    Electric     Electric
Solar Garden
                     Lithium-ion
                                   Distribution
                                                  Company      Company                                                                                                         O                     O
and Storage
                      Battery:
Sauk City             Lithium                      Electric     Electric
Microgrid Project      Ferro
                                     Remote
                                                  Company      Company          O                                                                                                                                                                                                                          O
                     Phosphate
Storage
System Solar           Battery:     Customer-      Electric     Electric
Demonstration        Lithium-ion      sited       Company      Company                                                             O                                           O                     O
Project
Wellman Battery        Battery:                    Electric     Electric
Storage              Lithium-ion
                                   Distribution
                                                  Company      Company          O                                                                                                                    O                 O
Ameren Corporation
Ameren Illinois:
                       Battery:                    Electric     Electric
Thebes Battery
                     Lithium-ion
                                   Distribution
                                                  Company      Company          O                                                                                                                                                              O
Project

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U.S. Electric Company Investment and Innovation in Energy Storage - Leading the Way
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                                                                             T or D
                       Energy         Energy
                                                                            Upgrade                                                                                                                                                                                         Customer
                       Storage       Storage         Business Model                               Wholesale Market Services (Bulk and Ancillary)
                                                                               or                                                                                                                                                                                           Services
                     Technology      Location
                                                                            Deferral

                                                                                                                                                                                                                                        Harmonics, Inertia Response
                                                                                                                                                                                                                                         Black Start, Power Quality/
                                                                                                                                 Grid Asset Optimization
                                                                                       Frequency Regulation

                                                                                                                                                                                                                                                                                       Emergency Backup
                                                                                                                                                                                                 Variable Resources

                                                                                                                                                                                                                                                                                                          Microgrid Support
                                                                                                              Reserve Capacity

                                                                                                                                                           Spinning Reserve

                                                                                                                                                                              Energy Arbitrage
Table shows

                                                                                                                                                                                                                      Voltage Support

                                                                                                                                                                                                                                                                       Load Shifting
primary and

                                                                                                                                                                                                     Integration
                                                     Operator

                                                                  Owner
secondary use
cases associated
with documented
storage projects

Avangrid
                                     Customer-
New York State
                                       sited,
Electric & Gas:
                       Battery:     aggregated      Electric     Electric
Aggregated
                     Lithium-ion   to operate at   Company      Company                                                             O                                           O                                                                                        O
Behind-the-
                                    distribution
Meter Storage
                                        level
New York State
Electric & Gas:
Distribution           Battery:                     Electric     Electric
Circuit Deployed     Lithium-ion
                                   Distribution
                                                   Company      Company                                                             O                                           O                                       O                       O
Battery Storage
System Pilot
Rochester
Gas & Electric:
Integrated EV          Battery:     Customer-       Electric     Electric
Charging &           Lithium-ion      sited        Company      Company                                                             O
Battery Storage
System
Rochester
Gas & Electric:        Battery:                     Electric     Electric
Peak Shaving         Lithium-ion
                                   Distribution
                                                   Company      Company                                                             O                                                                                   O                       O
Pilot Project
Berkshire Hathaway Energy
MidAmerican
                      Battery:
Energy Company:
                      Lithium                       Electric     Electric
Knoxville
                       Ferro
                                   Distribution
                                                   Company      Company                                                                                                         O                     O                 O
Battery Energy
                     Phosphate
Storage System
Pacificorp –
                      Battery:
Rocky Mountain
                      Lithium       Customer-       Electric      Third
Power: Soleil
                       Ferro          sited        Company        party                   O                     O                                            O                                        O                                                                                  O
Lofts Virtual
                     Phosphate
Power Plant
CenterPoint Energy
Solar Plus             Battery:                     Electric     Electric
Storage Project      Lithium-ion
                                   Distribution
                                                   Company      Company                   O                                                                                     O                     O                 O

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U.S. Electric Company Investment and Innovation in Energy Storage - Leading the Way
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                                                                               T or D
                         Energy        Energy
                                                                              Upgrade                                                                                                                                                                                         Customer
                         Storage      Storage          Business Model                               Wholesale Market Services (Bulk and Ancillary)
                                                                                 or                                                                                                                                                                                           Services
                       Technology     Location
                                                                              Deferral

                                                                                                                                                                                                                                          Harmonics, Inertia Response
                                                                                                                                                                                                                                           Black Start, Power Quality/
                                                                                                                                   Grid Asset Optimization
                                                                                         Frequency Regulation

                                                                                                                                                                                                                                                                                         Emergency Backup
                                                                                                                                                                                                   Variable Resources

                                                                                                                                                                                                                                                                                                            Microgrid Support
                                                                                                                Reserve Capacity

                                                                                                                                                             Spinning Reserve

                                                                                                                                                                                Energy Arbitrage
Table shows

                                                                                                                                                                                                                        Voltage Support

                                                                                                                                                                                                                                                                         Load Shifting
primary and

                                                                                                                                                                                                       Integration
                                                       Operator

                                                                    Owner
secondary use
cases associated
with documented
storage projects

Consolidated Edison Company of New York
Commercial
                                      Customer-
Battery Storage          Battery:                      Third        Third
(Beyond Behind-        Lithium-ion
                                     sited, front-
                                                       party        party                   O                                                                                     O                                       O
                                     of-the-meter
the-Meter)
                                      Customer-
Gateway Center           Battery:                      Third        Third
Mall Battery           Lithium-ion
                                     sited, front-
                                                       party        party          O                                                                                              O
                                     of-the-meter
Ozone Park               Battery:                     Electric     Electric
Battery                Lithium-ion
                                     Distribution
                                                     Company      Company          O        O                                                                                     O
Dominion Energy
Bath County
                        Pumped-                       Electric     Electric
Pumped Storage
                         hydro
                                     Transmission
                                                     Company      Company                                         O                                            O                  O
Station
DTE Energy
EV Fast
                         Battery:      Behind-
Charging-Plus-
                       Lithium-ion    the-meter
                                                     Customer     Customer         O                                                  O                                                                                                                                    O
Storage Pilot
Duke Energy
Rock Hill
Community 9              Battery:                     Electric     Electric
MW Battery             Lithium-ion
                                     Distribution
                                                     Company      Company                   O                                                                                                                                                     O
System
Camp Atterbury                        Customer-       Electric     Electric
Microgrid
                        Battery
                                        sited        Company      Company                   O                                                                                                           O                                         O                                        O O
                                                      Electric     Electric
Nabb Battery Site       Battery      Distribution
                                                     Company      Company          O        O                                                                                                                                                                                              O
Edison International
Southern
California               Battery:                      Third        Third
Edison: Alamitos       Lithium-ion
                                     Generation
                                                       party        party                                         O                                                               O                     O
Energy Storage

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U.S. Electric Company Investment and Innovation in Energy Storage - Leading the Way
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        U. S . E LEC TRIC COM PANY I NVE STM E NT
        A N D I N N O VAT I O N I N E N E R G Y S T O R A G E

                                                                            T or D
                       Energy        Energy
                                                                           Upgrade                                                                                                                                                                                         Customer
                       Storage      Storage         Business Model                               Wholesale Market Services (Bulk and Ancillary)
                                                                              or                                                                                                                                                                                           Services
                     Technology     Location
                                                                           Deferral

                                                                                                                                                                                                                                       Harmonics, Inertia Response
                                                                                                                                                                                                                                        Black Start, Power Quality/
                                                                                                                                Grid Asset Optimization
                                                                                      Frequency Regulation

                                                                                                                                                                                                                                                                                      Emergency Backup
                                                                                                                                                                                                Variable Resources

                                                                                                                                                                                                                                                                                                         Microgrid Support
                                                                                                             Reserve Capacity

                                                                                                                                                          Spinning Reserve

                                                                                                                                                                             Energy Arbitrage
Table shows

                                                                                                                                                                                                                     Voltage Support

                                                                                                                                                                                                                                                                      Load Shifting
primary and

                                                                                                                                                                                                    Integration
                                                    Operator

                                                                 Owner
secondary use
cases associated
with documented
storage projects

Southern
                                   Customer-       Electric      Third
California Edison:    Thermal
                                     sited        Company        party                                                                                                         O                                                                                        O
Ice Bear
Southern
California Edison:
                      Pumped-                      Electric     Electric
John S. Eastwood
                       hydro
                                   Distribution
                                                  Company      Company                                                                                                         O                     O
Pumped Storage
Station
Southern
California
Edison: Mira           Battery:                    Electric     Electric
Loma Substation      Lithium-ion
                                   Distribution
                                                  Company      Company                                                                                                         O                     O
Battery Storage
Project
Green Mountain Power
Essex Solar
                       Battery:                     Third        Third
and Storage
                     Lithium-ion
                                   Distribution
                                                    party        party                   O                                                                                     O                     O                                                                                                     O
Microgrid

Ferrisburgh Solar
                       Battery:                     Third        Third
and Storage
                     Lithium-ion
                                   Distribution
                                                    party        party                   O                                                                                     O                     O                                                                                                     O
Microgrid

Milton Solar
                       Battery:                     Third        Third
and Storage
                     Lithium-ion
                                   Distribution
                                                    party        party                   O                                                                                     O                     O                                                                                                     O
Microgrid
Hawaiian Electric Companies
Schofield Hawaii
                                                   Electric     Electric
Public Purpose            -        Distribution
                                                  Company      Company                                                                                                                               O                                         O                                                           O
Microgrid
Liberty Utilities
                      Battery:
California:
                      Lithium                      Electric     Electric
Sagehen
                       Ferro
                                   Distribution
                                                  Company      Company           O                                                                                                                   O                 O                                                O                                  O
Microgrid
                     Phosphate

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U.S. Electric Company Investment and Innovation in Energy Storage - Leading the Way
Leading the Way
       U. S . E LEC TRIC COM PANY I NVE STM E NT
       A N D I N N O VAT I O N I N E N E R G Y S T O R A G E

                                                                          T or D
                     Energy        Energy
                                                                         Upgrade                                                                                                                                                                                         Customer
                     Storage      Storage         Business Model                               Wholesale Market Services (Bulk and Ancillary)
                                                                            or                                                                                                                                                                                           Services
                   Technology     Location
                                                                         Deferral

                                                                                                                                                                                                                                     Harmonics, Inertia Response
                                                                                                                                                                                                                                      Black Start, Power Quality/
                                                                                                                              Grid Asset Optimization
                                                                                    Frequency Regulation

                                                                                                                                                                                                                                                                                    Emergency Backup
                                                                                                                                                                                              Variable Resources

                                                                                                                                                                                                                                                                                                       Microgrid Support
                                                                                                           Reserve Capacity

                                                                                                                                                        Spinning Reserve

                                                                                                                                                                           Energy Arbitrage
Table shows

                                                                                                                                                                                                                   Voltage Support

                                                                                                                                                                                                                                                                    Load Shifting
primary and

                                                                                                                                                                                                  Integration
                                                  Operator

                                                               Owner
secondary use
cases associated
with documented
storage projects

New Hampshire:
                     Battery:     Customer-      Electric     Electric
Tesla Powerwall
                   Lithium-ion      sited       Company      Company                                                                                                         O                                                                                        O O
2 Pilot Program
National Grid
Pulaski, New
                     Battery:                    Electric     Electric
York Battery
                   Lithium-ion
                                 Distribution
                                                Company      Company                                         O                                                                                     O
Storage System
NextEra Energy
Florida Power &
Light Company:       Battery:                    Electric     Electric
Wynwood            Lithium-ion
                                 Distribution
                                                Company      Company            O                                                O                                           O                     O
Energy Storage
PPL Corporation
LG&E and
KU Energy:
E.W. Brown
Generating
                     Battery:                    Electric     Electric
Station Energy
                   Lithium-ion
                                 Distribution
                                                Company      Company                                         O                                                               O                     O                                         O
Storage
Research and
Demonstration
Site
Public Service Electric & Gas Company
Highland Park
                     Battery:                    Electric     Electric
Landfill Solar
                   Lithium-ion
                                 Distribution
                                                Company      Company                                                                                                                               O                 O
Storage System
Sempra Energy
San Diego Gas
& Electric: El       Battery:                    Electric     Electric
Cajon Battery      Lithium-ion
                                 Distribution
                                                Company      Company                                                                                                                               O
Storage Project
San Diego Gas
& Electric: GRC      Battery:                    Electric     Electric
Energy Storage     Lithium-ion
                                 Distribution
                                                Company      Company            O                            O                                                                                                       O                       O                                                           O
Program

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U.S. Electric Company Investment and Innovation in Energy Storage - Leading the Way
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       U. S . E LEC TRIC COM PANY I NVE STM E NT
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                                                                            T or D
                       Energy        Energy
                                                                           Upgrade                                                                                                                                                                                         Customer
                       Storage      Storage         Business Model                               Wholesale Market Services (Bulk and Ancillary)
                                                                              or                                                                                                                                                                                           Services
                     Technology     Location
                                                                           Deferral

                                                                                                                                                                                                                                       Harmonics, Inertia Response
                                                                                                                                                                                                                                        Black Start, Power Quality/
                                                                                                                                Grid Asset Optimization
                                                                                      Frequency Regulation

                                                                                                                                                                                                                                                                                      Emergency Backup
                                                                                                                                                                                                Variable Resources

                                                                                                                                                                                                                                                                                                         Microgrid Support
                                                                                                             Reserve Capacity

                                                                                                                                                          Spinning Reserve

                                                                                                                                                                             Energy Arbitrage
Table shows

                                                                                                                                                                                                                     Voltage Support

                                                                                                                                                                                                                                                                      Load Shifting
primary and

                                                                                                                                                                                                    Integration
                                                    Operator

                                                                 Owner
secondary use
cases associated
with documented
storage projects

San Diego Gas &
Electric: Ramona       Battery:                    Electric     Electric
Air Attack Base      Lithium-ion
                                   Distribution
                                                  Company      Company                                                                                                                                                                                                                  O O
Microgrid
San Diego Gas &
Electric:             Battery:
                                                   Electric      Third
Vanadium Redox       Vanadium      Distribution
                                                  Company        party                                                                                                                               O
Battery Storage        Redox
Pilot Project
Southern Company
                      Battery:
Alabama Power
                      Lithium-
Company:                                           Electric     Electric
Energy Storage
                      ion and      Distribution
                                                  Company      Company                                                                                                                               O
                     Vanadium
Research Center
                       Redox
Georgia Power
Company:
                       Battery:    Customer-       Electric     Electric
Georgia
                     Lithium-ion     sited        Company      Company                                                                                                                               O                                                                                  O
Power Smart
Neighborhood
Georgia Power
                       Battery:    Customer-       Electric      Third
Company: Tech
                     Lithium-ion     sited        Company        party                                                                                                         O                                                                                                        O O
Square Microgrid
Unitil Corporation
Virtual Power
                       Battery:    Customer-       Electric     Electric
Plant Pilot
                     Lithium-ion     sited        Company      Company                                                                                                         O                     O                                                                                  O
Project

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                                                                               COM PANY

                                                                               ¡ AES Corporation
                                                                                 – AES Indiana

Harding Street Station                                                         L O C AT I O N

                                                                               ¡ Indianapolis, Indiana

Battery Energy
Storage Array
                                                                               PROJECT
                                                                               OVERVIEW

                                                                               ¡ Business Model:
                                                                                 Electric company
                                                                                 owned and operated
                                         The Harding Street Station Battery
                                         Energy Storage Array has a modular    ¡ Energy Storage
                                         design comprised of eight 2.5           Location:
                                         megawatt cores totaling 97,600          Transmission—
                                         lithium-ion batteries. More than        138 KV line
                                         20,000 data points in each core are
                                         monitored and controlled through      ¡ Technology:
                                         software. The system helps balance      Lithium-ion
                                         grid frequency by instantaneously
                                         adding or removing energy from the    ¡ Size:
                                         energy grid as needed, automati-        20 MW/20 MWh
                                         cally delivering frequency control
                                                                               ¡ Duration:
                                         services without the need for
                                                                                 01:00 (HH:MM)
                                         dispatch or human intervention.
AES Indiana’s Harding Street Station Battery Energy Storage Array is           ¡ Services:
the first energy storage system in the United States to provide primary          Primary frequency
frequency response. This service mitigates deviations from the nominal           response, frequency
frequency of 60 hertz. Deviations from 60 hertz can cause problems with          regulation
process equipment, computers, lighting, and electric motors. If deviations
are prolonged and/or of sufficient magnitude, power plants can stop oper-      ¡ Operation Start:
ating, which can lead to brownouts or blackouts. Advanced technologies           May 2016
like the Harding Street Station Battery Energy Storage Array benefit AES
Indiana’s customers with safe and reliable service, ensuring the resilience
of the energy grid. AES Indiana received the 2017 Project of the Year award
from POWERGRID International for this facility.

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                                                                              COM PANY

                                                                              ¡ Alliant Energy

                                                                              L O C AT I O N

Decorah Energy                                                                ¡ Decorah, Iowa

Storage Project                                                               PROJECT
                                                                              OVERVIEW

                                                                              ¡ Business Model:
                                       Alliant Energy built the 2.5 mega-       Alliant Energy-owned,
                                       watt/2.922 megawatt hour system          10-year operations and
                                       on a circuit in Decorah, Iowa, that      maintenance contract
                                       soon will reach capacity as increas-     with EnelX, which
                                       ingly more customers install private     developed the project
                                       solar. The system helps increase
                                       the reliability, resilience, and       ¡ Energy Storage
                                       hosting capacity of the local            Location:
                                       energy grid by storing excess solar      Distribution
                                       power generated during the day
                                       and releasing it during the evening    ¡ Technology:
                                       peak demand period. The system           Lithium-ion, NMC
                                       also regulates voltage through its       Chemistry (Samsung)
                                       voltage variation function, and its
                                                                              ¡ Size:
oversized inverter provides increased variation capability.
                                                                                2.5 MW/2.922 MWh
Alliant Energy partnered with the U.S. Department of Energy (DOE) and
the Iowa Economic Development Authority (IDEA) to build this battery          ¡ Duration:
storage solution and secured a $250,000 cost-share from DOE and a               01:00 (HH:MM)
$200,000 cost-share from IDEA. DOE also provided technical support
through Sandia National Laboratories, which continuously collects data        ¡ Services:
from the project to inform its national energy storage research.                Distribution system
                                                                                upgrade, increase
                                                                                hosting capacity,
                                                                                voltage regulation,
                                                                                real power flow
                                                                                regulation—peak load
                                                                                and renewables shifting

                                                                              ¡ Operation Start:
                                                                                2020

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                                                                               COM PANY

                                                                               ¡ Alliant Energy

Marshalltown
                                                                               L O C AT I O N

                                                                               ¡ Marshalltown, Iowa

Solar Garden                                                                   PROJECT
                                                                               OVERVIEW

                                                                               ¡ Business Model:
                                      Alliant Energy installed a 250
                                                                                 Electric company
                                      kilowatt/548 kilowatt hour battery
                                                                                 owned and operated
                                      energy storage system at its solar
                                      garden in Marshalltown, Iowa. The        ¡ Energy Storage
                                      solar system began generating              Location:
                                      power in February 2020 and the             Distribution
                                      storage system came online in
                                      October 2020. The battery is Alliant     ¡ Technology:
                                      Energy’s first storage system directly     Solar array,
                                      connected to universal solar. The          lithium-ion battery
                                      solar panels charge the battery
                                      during the day, and the battery          ¡ Size:
                                      discharges after the sun goes down.        Solar – 2.55 MW;
                                      The 548 kilowatt hour battery can          Battery – 250
                                      power 200 homes for two hours.             kW/548 kWh

                                                                               ¡ Duration:
                                                                                 02:00 (HH:MM)

                                                                               ¡ Services:
                                                                                 Renewable integration,
                                                                                 energy time shift

                                                                               ¡ Operation Start:
                                                                                 October 2020

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                                                                                COM PANY

                                                                                ¡ Alliant Energy

Sauk City Microgrid
                                                                                L O C AT I O N

                                                                                ¡ Sauk City, Wisconsin

Project                                                                         PROJECT
                                                                                OVERVIEW

                                                                                ¡ Business Model:
                                        Alliant Energy built the Sauk City
                                                                                  Electric company
                                        microgrid at a Wisconsin state park
                                                                                  owned and operated
                                        to provide electricity to two remote
                                        Wisconsin Department of Natural         ¡ Energy Storage
                                        Resources (DNR) park buildings.           Location:
                                        The microgrid replaced an over-           Remote – not
                                        head line that connected the              connected to
                                        buildings to the distribution grid.       distribution system
                                        As the line neared replacement,
                                        Alliant Energy collaborated with        ¡ Technology:
                                        DNR staff and found that installing       Solar array, lithium ferro
                                        a solar and battery microgrid would       phosphate battery
                                        cut costs in half. Alliant Energy
                                        energized the microgrid in early        ¡ Size:
2020. The microgrid consists of a 6 kilowatt solar array and a 16 kilowatt/42     Solar – 6 kW;
kilowatt hour battery that are not connected to the distribution system,          Battery – 16 kW/42 kWh
operating separately from the grid. The system powers lighting and a water
                                                                                ¡ Duration:
pump. The microgrid also serves as a pilot project that Alliant Energy can
                                                                                  02:00 (HH:MM)
study and use as a model to develop similar solutions going forward.
                                                                                ¡ Services:
                                                                                  Electric service
                                                                                  reliability in remote
                                                                                  location, distribution
                                                                                  system upgrade
                                                                                  replacement

                                                                                ¡ Operation Start:
                                                                                  2020

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                                                                               ¡ Alliant Energy

Storage System Solar
                                                                               L O C AT I O N

                                                                               ¡ Madison, Wisconsin

Demonstration Project                                                          PROJECT
(Part of Integrated Grid Pilot Projects)                                       OVERVIEW

                                                                               ¡ Business Model:
                                                                                 Electric company
                                                                                 owned and operated
Alliant Energy’s lithium-ion battery, connected to ground-level and build-
ing-mounted solar panels, supports the company’s broader collaborative         ¡ Energy Storage
demonstration effort, in partnership with the Electric Power Research            Location:
Institute (EPRI), to install more than three dozen unique renewable energy       Customer-sited
features such as electric vehicle charging stations. The project lowers          at Alliant Energy
electric bills in its Madison headquarters by storing energy during low-cost     headquarters
times and discharging it during peak periods.
Phase I of the project included several ground-level and building-mounted      ¡ Technology:
solar panels, solar parking canopies covering nearly 50 parking spaces, 13       Solar array,
electric vehicle charging stations, solar café tables, and a battery energy      lithium-ion battery
storage system to support the various solar activities.                        ¡ Size:
The purpose of the project is to research solar technology. While the data       Solar – 0.3 MW;
is being collected, solar generation and energy storage are used for elec-       Storage – 250
tric bill management and energy time shift.                                      kW/500kWh

                                                                               ¡ Duration:
                                                                                 02:00 (HH:MM)

                                                                               ¡ Services:
                                                                                 Research of
                                                                                 renewable energy
                                                                                 implementation, electric
                                                                                 bill management,
                                                                                 energy time shift

                                                                               ¡ Operation Start:
                                                                                 2016

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                                                                                   COM PANY

                                                                                   ¡ Alliant Energy

Wellman Battery Storage
                                                                                   L O C AT I O N

                                                                                   ¡ Wellman, Iowa

                                                                                   PROJECT
                                           Alliant Energy built this battery
                                                                                   OVERVIEW
                                           storage project in Wellman, Iowa,
                                           near residential customers with         ¡ Business Model:
                                           private solar panels. The battery         Electric company
                                           works as a buffer to balance power        owned and operated
                                           fluctuations caused by changes
                                           from the intensity of the sun and to    ¡ Energy Storage
                                           provide stable electricity. By            Location:
                                           installing this battery, Alliant          Distribution
                                           Energy enabled private solar
                                           generation and substituted the          ¡ Technology:
                                           battery for traditional lines, poles,     Lithium-ion, NCM
                                           and other equipment, which would          Chemistry (Tesla)
                                           have doubled costs. When fully
                                                                                   ¡ Size:
charged, the battery can store enough energy to power nearly 650 homes
                                                                                     684 kW/2.65 MWh
for four hours. In the future, Alliant Energy could use the battery to form a
microgrid using local behind-the-meter generation.                                 ¡ Duration:
                                                                                     04:00 (HH:MM)

                                                                                   ¡ Services:
                                                                                     Voltage regulation,
                                                                                     renewable
                                                                                     integration, increase
                                                                                     hosting capacity,
                                                                                     distribution system
                                                                                     upgrade deferral

                                                                                   ¡ Operation Start:
                                                                                     2019

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                                                                              COM PANY

                                                                              ¡ Ameren Corporation
                                                                                – Ameren Illinois

Thebes Battery Project                                                        L O C AT I O N

                                                                              ¡ Thebes, Illinois

                                      Ameren Illinois installed the battery
                                      energy storage system in Thebes,        PROJECT
                                      Illinois, to provide additional         OVERVIEW
                                      resilience and reliability to the
                                                                              ¡ Business Model:
                                      community. The town is surrounded
                                                                                Electric company
                                      by rough terrain and is served by a
                                                                                owned and operated
                                      single distribution line located in a
                                      national forest. Because of its         ¡ Energy Storage
                                      location, power outage restorations       Location:
                                      are more difficult and time-con-          Distribution
                                      suming than in most communities.
                                      In the event of an outage, the          ¡ Technology:
                                      system automatically supplies             Lithium-ion
                                      power to customers in the area until
crews can inspect upstream equipment. Construction of the project took        ¡ Size:
about six weeks, and customers on the circuit now experience fewer and          1 MW/1 MWh
shorter outages.
                                                                              ¡ Duration:
                                                                                01:00 (HH:MM)

                                                                              ¡ Services:
                                                                                Reliability, resiliency,
                                                                                black start

                                                                              ¡ Operation Start:
                                                                                2017

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                                                                                 COM PANY

                                                                                 ¡ Avangrid – New York
                                                                                   State Electric & Gas

Aggregated Behind-the-                                                           L O C AT I O N

Meter Energy Storage                                                             ¡ Ithaca, New York

                                                                                 PROJECT
                                                                                 OVERVIEW
New York State Electric & Gas’s (NYSEG) Aggregated Behind-the-Meter
(BTM) Energy Storage project is a New York Reforming the Energy Vision           ¡ Business Model:
(REV) demonstration project and supports the company’s broader collabo-            Electric company
rative REV efforts. Its goal is to examine how energy storage reduces indi-        owned and operated
vidual commercial customer demand and to aggregate individual energy
storage systems to provide circuit and substation level peak reduction.          ¡ Energy Storage
The project is located near Ithaca within NYSEG’s Energy Smart Commu-              Location:
nity where the company is testing future grid technologies to establish            Customer-sited
best practices.
                                                                                 ¡ Technology:
NYSEG expects the BTM project to result in an increased understanding of           Lithium-ion
how energy storage can support individual customers as well as the needs
of the electric distribution grid. NYSEG partnered with Tesla to install         ¡ Size:
six commercial storage facilities of varying sizes BTM. Between 2018               6 systems totaling
and 2020, Tesla installed five battery sites. The sixth and final site was         765 kW/3,080 kWh
completed in November 2020, allowing the company to test the aggrega-
                                                                                 ¡ Duration:
tion capabilities and benefits.
                                                                                   04:00 (HH:MM)
NYSEG will continue to collect operational data, evaluate lessons learned, and
review best practices for the benefit of its customers and the energy grid.      ¡ Services:
                                                                                   Customer energy
                                                                                   demand management,
                                                                                   aggregated demand
                                                                                   response for market
                                                                                   participation,
                                                                                   circuit, and system
                                                                                   peak reduction

                                                                                 ¡ Operation Start:
                                                                                   2 systems at the
                                                                                   end of 2018, 4
                                                                                   systems in 2020

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                                                                              COM PANY

                             		                                               ¡ Avangrid – New York
                                                                                State Electric & Gas

Distribution Circuit                                                          L O C AT I O N

Deployed Battery                                                              ¡ Ithaca, New York

Storage System                                                                PROJECT
                                                                              OVERVIEW

Pilot Project                                                                 ¡ Business Model:
                                                                                Electric company
                                                                                owned and operated

The Distribution Circuit Deployed Battery Storage System supports New         ¡ Energy Storage
York State Electric & Gas’s (NYSEG’s) overall vision for developing and         Location:
integrating beneficial energy storage. The pilot project seeks to demon-        Distribution
strate how to effectively integrate, operate, and optimize the value of a
                                                                              ¡ Technology:
distribution circuit deployed energy storage system.
                                                                                Lithium-ion
NYSEG strategically installed the 477 kilowatt/1,890 kilowatt hour energy
storage system on a distribution circuit in Ithaca, N.Y., located within      ¡ Size:
the Energy Smart Community where the company is testing future grid             477 kW/1,890 kWh
technologies to establish best practices. The pilot project allows for the
                                                                              ¡ Duration:
battery to charge during off-peak periods and discharge during high
                                                                                04:00 (HH:MM)
loading periods to improve circuit efficiency. The pilot project will eval-
uate daily load leveling, the impact on daily circuit peak load reduction,    ¡ Services:
circuit voltage regulation, and demand response effectiveness. NYSEG            Daily circuit peak
is piloting this energy storage system on an unconstrained circuit which        demand reduction
provides the operational flexibility to test the use cases independent of       and load shaping,
operational restrictions.                                                       maintain circuit
                                                                                loading with its rating,
                                                                                voltage regulation

                                                                              ¡ Operation Start:
                                                                                2018

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                                                                                  COM PANY

                                                                                  ¡ Avangrid – Rochester
                                                                                    Gas & Electric (RG&E)

Integrated Electric                                                               L O C AT I O N

Vehicle Charging &
                                                                                  ¡ Rochester, New York

Battery Storage System
                                                                                  PROJECT
                                                                                  OVERVIEW

                                                                                  ¡ Business Model:
                                                                                    Electric company
Rochester Gas & Electric’s (RG&E) Integrated Electric Vehicle Charging &            owned and operated
Battery Storage System project is a New York Reforming the Energy Vision
(REV) demonstration project and supports the company’s broader collabo-           ¡ Energy Storage
rative REV efforts. In 2018, RG&E installed a 150 kilowatt/600 kilowatt hour        Location:
energy storage system, two DC fast chargers and five level-two chargers             Customer-sited
at its Scottsville Road Operations Center in Rochester, N.Y. RG&E will be         ¡ Technology:
able to simulate electric vehicle (EV) fleet usage at this operations center to     Lithium-ion
improve the understanding of fleet demand charge management.
RG&E seeks to demonstrate how battery storage can improve EV                      ¡ Size:
economics, minimize the impact of EVs to the grid, and integrate energy             150 kW/600 kWh
storage with EV chargers to manage cost impacts and optimize value
                                                                                  ¡ Duration:
for customers. RG&E is using this project for building and circuit demand
                                                                                    04:00 (HH:MM)
reduction, building load factor improvement, and demand response. As of
the end of 2020, RG&E was validating hypothesis and collecting data.              ¡ Services:
                                                                                    Building/circuit demand
                                                                                    reduction, building load
                                                                                    factor improvement,
                                                                                    demand response

                                                                                  ¡ Operation Start:
                                                                                    2018

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                                                                               COM PANY

                                                                               ¡ Avangrid – Rochester
                                                                                 Gas & Electric (RG&E)

Peak Shaving                                                                   L O C AT I O N

Pilot Project                                                                  ¡ Farmington, New York

                                                                               PROJECT
                                                                               OVERVIEW
At this 2.2 megawatt/8.8 megawatt hour battery storage system at a
substation located in Farmington, N.Y., Rochester Gas & Electric set out to    ¡ Business Model:
study the potential of energy storage as an alternative solution to mitigate     Electric company
an expected capacity deficiency, improve power quality, and demonstrate          owned and operated
the value of additional battery technology capabilities.
                                                                               ¡ Energy Storage
The first use case for this pilot project is substation peak demand reduc-       Location:
tion, which is needed to reduce transformer peak loading several times           Distribution
per year in the summer months. The second goal of the pilot is to reduce
power quality issues for the customer. Since the battery storage system        ¡ Technology:
was installed, the RG&E customer data center has not had any reported            Lithium-ion
power quality issues. The final goal is to test the ability of the battery
to reduce operation and maintenance cycles and costs. The system               ¡ Size:
decreases the frequency with which the load-tap-changer, a mechanism             2.2 MW/8.8 MWh
to adjust circuit voltage based on load, operates. To date, the battery has
reduced the load-tap-changer frequency by nearly 10 percent, resulting in      ¡ Duration:
less frequent maintenance on the load-tap-changer.                               04:00 (HH:MM)

Through energy storage demonstrations and pilots such as the Peak              ¡ Services:
Shaving Pilot Project, RG&E is testing emerging technology to deliver elec-      Substation peak
tric distribution system benefits translating to savings for its customers.      demand reduction,
                                                                                 reduction of customer
                                                                                 experienced power
                                                                                 quality issues,
                                                                                 reduced operations
                                                                                 and maintenance
                                                                                 cycles and costs

                                                                               ¡ Operation Start:
                                                                                 2018

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                                                                             COM PANY

                                                                             ¡ Berkshire Hathaway

Knoxville Battery
                                                                               Energy – MidAmerican
                                                                               Energy Company

Energy Storage System                                                        L O C AT I O N

                                                                             ¡ Knoxville, Iowa

                                       MidAmerican Energy partnered
                                       with Invenergy to deploy a 1          PROJECT
                                       megawatt/4 megawatt hour              OVERVIEW
                                       lithium-iron phosphate battery
                                                                             ¡ Business Model:
                                       system at a distribution substation
                                                                               Electric company
                                       in Knoxville, Iowa. MidAmerican
                                                                               owned and operated
                                       Energy is using this project as a
                                       pilot to test the effectiveness of    ¡ Energy Storage
                                       pairing storage with wind genera-       Location:
                                       tion and to learn how energy            Distribution
                                       storage best serves its customers.
                                       The battery charges when demand       ¡ Technology:
                                       is low and the supply of wind           Lithium-iron phosphate
                                       power is high, and discharges
during periods of peak demand. This creates cost savings and enhances        ¡ Size:
MidAmerican Energy’s ability to provide low-cost, renewable energy to its      1 MW/4 MWh
customers. The system can power nearly 900 homes for up to four hours.
                                                                             ¡ Duration:
                                                                               04:00 (HH:MM)

                                                                             ¡ Services:
                                                                               Energy arbitrage
                                                                               and time-shift,
                                                                               voltage support

                                                                             ¡ Operation Start:
                                                                               December 2018

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                                                                               COM PANY

                                                                               ¡ Berkshire Hathaway

Soleil Lofts Virtual
                                                                                 Energy – PacifiCorp –
                                                                                 Rocky Mountain Power

Power Plant                                                                    L O C AT I O N

                                                                               ¡ Herriman, Utah

                                        Rocky Mountain Power (RMP)
                                        partnered with real estate company     PROJECT
                                        Wasatch Group and energy storage       OVERVIEW
                                        manufacturer Sonnen to develop a
                                                                               ¡ Business Model:
                                        first-of-its-kind electric compa-
                                                                                 Third-party owned,
                                        ny-managed residential solar-plus-
                                                                                 electric company
                                        storage development, and the
                                                                                 operated
                                        largest to-date residential battery
                                        demand response project in the         ¡ Energy Storage
                                        United States. The Soleil Lofts          Location:
                                        apartment community is all-elec-         Customer-sited
                                        tric. Each of the 600 units has an 8
                                        kilowatt/20 kilowatt hour battery,     ¡ Technology:
                                        which can provide backup power           Private and universal
                                        for multiple days depending on the       solar with Sonnen
time of year and customer electricity usage. Residents’ batteries are            ecoLinx lithium iron
charged by 5.2 megawatts of private solar. Wasatch owns the solar and            phosphate batteries
storage, while RMP aggregates the batteries and solar to form a virtual
power plant (VPP) that it can use to manage peak usage and renewable           ¡ Size:
energy on the energy grid. RMP also will utilize the VPP for smart grid          Solar – 5.2 MW;
applications, such as peak load management, frequency response,                  Storage – 5
contingency reserves, and daily load cycling.                                    MW/12.6 MWh

                                                                               ¡ Duration:
                                                                                 02:30 (HH:MM)

                                                                               ¡ Services:
                                                                                 Backup power,
                                                                                 smart grid demand
                                                                                 response, frequency
                                                                                 response, contingency
                                                                                 reserves, daily peak
                                                                                 load reduction

                                                                               ¡ Operation Start:
                                                                                 2020

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                                                                                 COM PANY

                                                                                 ¡ CenterPoint Energy

Solar Plus Storage
                                                                                 L O C AT I O N

                                                                                 ¡ Evansville, Indiana

System                                                                           PROJECT
                                                                                 OVERVIEW

                                                                                 ¡ Business Model:
                                        When CenterPoint Energy’s Indiana
                                                                                   Electric company
                                        electric territory completed its 2018
                                                                                   owned and operated
                                        Integrated Resource Plan, the
                                        preferred portfolio showed a future      ¡ Energy Storage
                                        less reliant on coal. As part of the       Location:
                                        plan to add more renewables to its         Distribution
                                        electric generation portfolio,
                                        CenterPoint Energy selected two          ¡ Technology:
                                        sites in its southwestern Indiana          Lithium-ion
                                        electric distribution footprint, which
                                        serves approximately 145,000             ¡ Size:
                                        customers, for a pilot project of 4        1 MW/4 MWh
                                        megawatts of solar electric genera-
                                                                                 ¡ Duration:
                                        tion. One of the sites chosen also
                                                                                   04:00 (HH:MM)
includes a lithium-ion 1 megawatt/4 megawatt hour battery – discharging 1
megawatt maximum output for four hours. The battery currently is                 ¡ Services:
programmed to charge when the sun comes up and to discharge in the                 Renewable integration,
afternoon to help alleviate peak load periods. It currently only is charged        peak shifting, frequency
from the solar panels. It can perform several different control functions,         control, voltage control
including voltage control, frequency control, and peak load shifting. When
factors such as cloud cover prohibit solar output, the battery can be used       ¡ Operation Start:
to avoid load swings.                                                              2019

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                                                                               COM PANY

                                                                               ¡ Consolidated Edison
                                                                                 – Consolidated Edison

Commercial Battery
                                                                                 Company of New York

Storage
                                                                               L O C AT I O N

                                                                               ¡ Various sites within
                                                                                 New York City,
(Beyond Behind-the-Meter)                                                        including Staten Island,
                                                                                 Bronx, and Queens

Con Edison is implementing demonstration projects to test new business         PROJECT
models and technologies that can benefit customers and contribute to           OVERVIEW
a clean energy future. The Commercial Battery Storage project placed
1 megawatt hour batteries at four customer properties selected by Con          ¡ Business Model:
Edison’s partner, GI Energy, where Con Edison’s distribution system              Third-party owned
needs support.                                                                   and operated (GI
The host customers receive quarterly lease payments. Con Edison has a            Energy), with Con
five-year contract with GI Energy that gives the electric company the right      Edison contract for grid
of first dispatch. This “storage-as-a-service” model provides Con Edison         support and wholesale
with peak shaving and voltage support in areas of need. When Con Edison          market revenues
is not calling the battery, the developer bids the asset into the wholesale    ¡ Energy Storage
markets, and splits the net revenue with Con Edison. The customer, devel-        Location:
oper, electric company, and the grid all benefit from this unique sharing of     Customer-sited, front-
costs and revenues.                                                              of-the-meter system
The project explores an alternative to more traditional “behind-the-meter”
batteries that customers would own to reduce their need for grid power at      ¡ Technology:
peak times and to save money on the associated demand charges. This              Lithium-ion
traditional behind-the-meter storage model has limited market potential
                                                                               ¡ Size:
because the economics work for only a small number of customers –
                                                                                 4 MW/4 MWh across
those with high, but short, demand peaks. The model also provides only
                                                                                 4 properties (1
nominal benefit to the electric company unless a participating customer is
                                                                                 MW/1 MWh each)
in a distribution deferral area.
The Commercial Battery Storage project seeks to open the market for            ¡ Duration at
customer-sited storage systems by placing them in front of the meter via a       rated power:
simple lease-for-space transaction.                                              01:00 (HH:MM)

                                                                               ¡ Services:
                                                                                 Peak load shaving,
                                                                                 voltage support,
                                                                                 frequency regulation

                                                                               ¡ Operation Start:
                                                                                 February 2020

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                                                                                COM PANY

                                                                                ¡ Consolidated Edison
                                                                                  – Consolidated Edison

Gateway Center
                                                                                  Company of New York

Mall Battery
                                                                                L O C AT I O N

                                                                                ¡ Brooklyn, New York

In 2014, Con Edison set out to defer the need to build a $1.2 billion substa-   PROJECT
tion through implementation of non-traditional solutions under the Brooklyn-    OVERVIEW
Queens Demand Management Program (BQDM). The program provides
                                                                                ¡ Business Model:
flexible alternatives to infrastructure upgrades in grid-constrained areas
                                                                                  Third-party owned
through a portfolio of customer- and electric company-side measures,
                                                                                  and operated
including energy storage, energy efficiency, and voltage optimization.
As part of BQDM, Enel X installed the largest customer-sited, front-of-the-     ¡ Energy Storage
meter battery system in New York City. This 4.8 megawatt/16.4 megawatt            Location:
hour lithium-ion system at the Gateway Center Mall in East New York,              Customer-sited, front-
Brooklyn, has provided peak load reduction to the local distribution              of-the-meter system
system since the summer of 2019. It also provides demand response
services, which helps increase grid reliability and reduces the need for        ¡ Technology:
power from less-efficient peaking plants during periods of high demand.           Lithium-ion

                                                                                ¡ Size:
                                                                                  4.8 MW/16.4 MWh

                                                                                ¡ Duration:
                                                                                  04:00 (HH:MM)

                                                                                ¡ Services:
                                                                                  Network peak load
                                                                                  relief and demand
                                                                                  response

                                                                                ¡ Operation Start:
                                                                                  2019

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                                                                                COM PANY

                                                                                ¡ Consolidated Edison
                                                                                  – Consolidated Edison

Ozone Park Battery
                                                                                  Company of New York

                                                                                L O C AT I O N

                                                                                ¡ Brooklyn, New York
In 2014, Con Edison set out to defer the need to build a $1.2 billion substa-
tion through implementation of non-traditional solutions under the Brook-
lyn-Queens Demand Management Program (BQDM). BQDM includes third-               PROJECT
party systems like the Gateway Center Mall battery and the Ozone Park           OVERVIEW
battery, which is electric company-owned, to reliably serve customers.
The Ozone Park, Queens, battery system started operation in early 2019.         ¡ Business Model:
Con Edison has relied on the unit for peak load shaving in the summer             Electric company
months since operation commenced. By taking stress off the local distri-          owned and operated
bution system at peak times, the system enhances reliability. The system,       ¡ Energy Storage
which is on substation property, also played an integral role in helping          Location:
the company maintain service through a transmission contingency in the            Distribution
summer of 2020. Con Edison is upgrading the system to meet New York
Independent System Operator requirements for additional grid services           ¡ Technology:
such as frequency regulation.                                                     Lithium-ion
Completed in partnership with Renewable Energy Solutions and BYD, the
                                                                                ¡ Size:
$15.5 million project includes a total of 2,240 batteries - eight containers
                                                                                  2 MW/11.1 MWh
with 280 lithium-iron phosphate batteries each and a switch gear
container. The system is the first electric company-owned, lithium-ion          ¡ Duration:
storage project of its size in New York City.                                     05:00 (HH:MM)

                                                                                ¡ Services:
                                                                                  Distribution deferral,
                                                                                  peak load shaving,
                                                                                  frequency regulation

                                                                                ¡ Operation Start:
                                                                                  2019

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                                                                                 COM PANY

                                                                                 ¡ Dominion Energy

Bath County Pumped
                                                                                 L O C AT I O N

                                                                                 ¡ Bath County, Virginia

Storage Station                                                                  PROJECT
                                                                                 OVERVIEW

                                                                                 ¡ Business Model:
                                         The Bath County Pumped Storage
                                                                                   Electric company
                                         Station is the largest pumped-
                                                                                   owned and operated
                                         hydro storage facility in the world
                                         and the 10th largest power plant in     ¡ Energy Storage
                                         the United States. When operating         Location:
                                         at full capacity, the facility            Transmission
                                         produces 3,000 megawatts,
                                         enough electricity to power nearly      ¡ Technology:
                                         750,000 homes for up to 10 hours.         Pumped-hydro
                                         The station is comprised of upper
                                         and lower reservoirs connected by       ¡ Size:
                                         tunnels under a mountain. During          3,003 MW/24,000 MWh
                                         periods of high demand, water is
                                                                                 ¡ Duration:
                                         released into the lower reservoir,
                                                                                   08:00 (HH:MM)
generating electricity. When demand is low, the generators are reversed,
becoming electric motors and pumping water back into the upper reser-            ¡ Services:
voir. The station can go from idle to generating at full capacity in as few as     Energy arbitrage,
15 minutes. Dominion Energy upgraded the station’s six turbines between            capacity
2004 and 2009, increasing each turbine’s capacity to 500.5 megawatts.
Dominion Energy also uses the station in conjunction with the Virginia           ¡ Operation Start:
Department of Game and Inland Fisheries to help maintain the environ-              1985
mental quality of the local watershed, releasing water into nearby streams
during droughts.

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U. S . E LEC TRIC COM PANY I NVE STM E NT
A N D I N N O VAT I O N I N E N E R G Y S T O R A G E

                                                                            COM PANY

                                                                            ¡ DTE Energy

EV Fast Charging-                                                           L O C AT I O N

Plus-Storage Pilot                                                          ¡ Auburn Hills, Michigan

                                                                            PROJECT
                                                                            OVERVIEW
                                     In February 2020, DTE Energy
                                     deployed two electric vehicle fast     ¡ Business Model:
                                     charging stations paired with 120        Customer owned
                                     kilowatt hour batteries at a Meijer      and operated
                                     grocery store in Auburn Hills,
                                     Mich. DTE Energy is using this         ¡ Energy Storage
                                     battery/charger pairing to study         Location:
                                     customer behavior and to deter-          Customer-sited, behind-
                                     mine if storage can reduce infra-        the-meter system
                                     structure investment or improve
                                                                            ¡ Size:
                                     the economics of fast charging
                                                                              150 kW/120 kWh
                                     stations. The batteries primarily
                                     will be used for demand charge         ¡ Duration:
                                     management, but also will provide        00:48 (HH:MM)
learnings for demand response capabilities and transmission and distribu-
tion deferral potential.                                                    ¡ Services:
                                                                              Demand charge
                                                                              management,
                                                                              testing applicability
                                                                              as T&D upgrade
                                                                              deferral project

                                                                            ¡ Operation Start:
                                                                              2020

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                                                                             COM PANY

                                                                             ¡ Duke Energy

                                                                             L O C AT I O N

Rock Hill Community                                                          ¡ Asheville, North
                                                                               Carolina

9 MW Battery System                                                          PROJECT
                                                                             OVERVIEW

                                                                             ¡ Business Model:
Duke Energy’s 9 megawatt battery energy storage system in the Rock Hill
                                                                               Electric company
Community of Asheville, N. C., came online in August 2020. It provides
                                                                               owned and operated
support services to the energy grid, including frequency regulation and
peaking support. The project is part of Duke Energy’s ongoing Western        ¡ Energy Storage
Carolinas Modernization Plan, which will upgrade the grid in the region to     Location:
meet the region’s future power demands. The plan was developed using           Distribution
input from stakeholders.
                                                                             ¡ Technology:
                                                                               Lithium-ion

                                                                             ¡ Size:
                                                                               9 MW/9 MWh

                                                                             ¡ Duration:
                                                                               01:00 (HH:MM)

                                                                             ¡ Services:
                                                                               Power quality,
                                                                               peaking support,
                                                                               frequency regulation

                                                                             ¡ Operation Start:
                                                                               2020

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                                                                           COM PANY

                                                                           ¡ Duke Energy

                                                                           L O C AT I O N

Camp Atterbury                                                             ¡ Edinburgh, Indiana

Microgrid                                                                  PROJECT
                                                                           OVERVIEW

                                                                           ¡ Business Model:
                                                                             Electric company
Duke Energy partnered with the Indiana National Guard and Doosan
                                                                             owned and operated
GridTech to build this solar-plus-storage microgrid at Camp Atterbury.
The system came online in 2020 and is interconnected at Duke Energy’s      ¡ Energy Storage
distribution substation located on the base. During normal operations,       Location:
the microgrid provides benefits such as frequency regulation, demand         Customer-sited
response, and solar firming to customers in the area and to the Midcon-
tinent Independent System Operator. In the event of a grid outage, the     ¡ Technology:
microgrid will island itself from the main grid and continue to provide      Solar array,
power to critical facilities on the base. Duke Energy expects the energy     lithium-ion battery
storage asset to come online in Spring 2021.
                                                                           ¡ Size:
                                                                             Solar – 2 MW;
                                                                             Storage – 5 MW/5 MWh

                                                                           ¡ Duration:
                                                                             01:00 (HH:MM)

                                                                           ¡ Services:
                                                                             Frequency regulation,
                                                                             grid reliability and
                                                                             stability, backup power

                                                                           ¡ Operation Start:
                                                                             Solar: 2019;
                                                                             Storage: 2021

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                                                                                 COM PANY

                                                                                 ¡ Duke Energy

                                                                                 L O C AT I O N

Nabb Battery Site                                                                ¡ Nabb, Indiana

                                                                                 PROJECT
                                                                                 OVERVIEW
The Nabb energy storage project is part of Duke Energy’s strategy to own,
operate, and integrate distributed energy technologies like energy storage       ¡ Business Model:
for customer benefit. The Nabb substation, which serves a community in             Electric company
Southern Indiana, was identified as a strategic location to deploy a battery       owned and operated
to realize the benefits of energy storage. The investment will enable Duke
Energy Indiana to enhance the reliability of the community in a cost-            ¡ Energy Storage
effective way and defer the immediate need of additional wires to support          Location:
enhanced reliability (a 69kW feeder). Additionally, the grid-tied battery will     Distribution
serve the Midcontinent Independent System Operator market, providing
benefits to the bulk power system and benefits to the local distribution         ¡ Technology:
system, which positively impacts all Duke Energy Indiana customers.                Lithium-ion

                                                                                 ¡ Size:
                                                                                   5 MW/5 MWh

                                                                                 ¡ Duration:
                                                                                   01:00 (HH:MM)

                                                                                 ¡ Services:
                                                                                   Upgrade deferral,
                                                                                   frequency regulation,
                                                                                   backup power

                                                                                 ¡ Operation Start:
                                                                                   2020

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                                                                              COM PANY

                                                                              ¡ Edison International
                                                                                – Southern
                                                                                California Edison

Alamitos Energy
Storage
                                                                              L O C AT I O N

                                                                              ¡ Long Beach, California

                                                                              PROJECT
Southern California Edison (SCE) procures energy and capacity from the        OVERVIEW
Alamitos battery installation through a 20-year power purchase agree-
ment with AES Corporation, which owns and operates it at the Alamitos         ¡ Business Model:
Energy Center. The system provides power flexibility and reliability to SCE     Power purchase
customers. With 100 megawatts of capacity, the system can supply power          agreement with AES
to tens of thousands of homes within milliseconds. While the system was
procured and built specifically to provide power during periods of peak       ¡ Energy Storage
demand, it also supports grid modernization, helps integrate renewable          Location:
generation into the grid, and lowers costs for customers. The project also      Generation; directly
helps reduce carbon emissions and it is part of a broader effort to replace     injects energy
aging peaking plants with cleaner sources of electricity.                       to the grid

                                                                              ¡ Technology:
                                                                                Lithium-ion

                                                                              ¡ Size:
                                                                                100 MW/400 MWh

                                                                              ¡ Duration:
                                                                                04:00 (HH:MM)

                                                                              ¡ Services:
                                                                                Capacity, energy,
                                                                                renewable integration

                                                                              ¡ Operation Start:
                                                                                2020

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                                                                                COM PANY

                                                                                ¡ Edison International
                                                                                  – Southern
                                                                                  California Edison

Ice Bear                                                                        L O C AT I O N

                                                                                ¡ Southern California
In 2014, Southern California Edison (SCE) contracted with thermal storage
solution provider Ice Energy for 21.6 megawatts of thermal storage
capacity. SCE awarded the 20-year power purchase agreement contract             PROJECT
through a competitive process, and SCE procured a total of 250 mega-            OVERVIEW
watts of storage capacity, five times more than the minimum required by
                                                                                ¡ Business Model:
the California Public Utility Commission.
                                                                                  Power purchase
Ice Energy deployed more than 1,200 of its Ice Bear thermal battery               agreement with
systems from 2018 to 2020. Ice Bears use low-cost electricity to freeze           Ice Bear
water when demand for air conditioning is low and use the stored ice to
provide cooling for up to six hours during peak hours. Under the program,       ¡ Energy Storage
participating commercial customers in SCE’s service territory were eligible       Location:
to have free Ice Bears installed on their properties. The Ice Bears help          Customer-sited
these customers manage high demand, while providing SCE with real-time
visibility and control of the storage resource for load-shifting and dispatch   ¡ Technology:
optimization. Ice Energy announced the completion of the first phase—an           Thermal
installation of approximately 100 units of 1.9 megawatts—in February of         ¡ Size:
2019. Each Ice Bear is expected to reduce up to 10 tons of carbon dioxide
                                                                                  ~1,200 units,
emissions per year.                                                               totaling 21.6 MW of
                                                                                  energy storage

                                                                                ¡ Duration:
                                                                                  Up to 6 hours

                                                                                ¡ Primary service:
                                                                                  Peak load
                                                                                  management, grid
                                                                                  stability and flexibility

                                                                                ¡ Available Since:
                                                                                  2019

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                                                                                COM PANY

                                                                                ¡ Edison International
                                                                                  – Southern
                                                                                  California Edison

John S. Eastwood
Pumped Storage Plant
                                                                                L O C AT I O N

                                                                                ¡ Shaver Lake, California

                                                                                PROJECT
                                         Southern California Edison’s (SCE’s)   OVERVIEW
                                         John S. Eastwood Pumped Storage
                                         Plant began operation in 1911 and      ¡ Business Model:
                                         is located 1,000 feet under the          Electric company
                                         Sierra Nevada mountains. During          owned and operated
                                         periods of high demand, water is
                                         released from the upper reservoir      ¡ Energy Storage
                                         to the lower reservoir, generating       Location:
                                         electricity. When demand is low,         Transmission
                                         the station uses electricity to pump
                                                                                ¡ Technology:
                                         water back into its upper reservoir.
                                                                                  Pumped-hydro
                                         While many pumped-hydro stations
                                         supply electricity during the day      ¡ Size:
                                         and recharge at night, the East-         200 MW/2,700 MWh
wood station may charge during the day as well to avoid curtailing excess
wind and solar generation. The facility is part of the Big Creek Hydroelec-     ¡ Duration:
tric Project that provides up to 5 percent of SCE customers’ power. Per           13:30 (HH:MM)
the California Energy Commission, the facility stored and released 255
gigawatt hours of energy in 2019.                                               ¡ Services:
                                                                                  Energy arbitrage,
                                                                                  renewable curtailment
                                                                                  avoidance

                                                                                ¡ Operation Start:
                                                                                  1987

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A N D I N N O VAT I O N I N E N E R G Y S T O R A G E

                                                                                   COM PANY

                                                                                   ¡ Edison International
                                                                                     – Southern
                                                                                     California Edison

Mira Loma Substation
Battery Storage Project
                                                                                   L O C AT I O N

                                                                                   ¡ Ontario, California

                                                                                   PROJECT
                                           Southern California Edison (SCE)        OVERVIEW
                                           partnered with Tesla to install
                                           a 20-megawatt battery energy            ¡ Business Model:
                                           storage system at its Mira Loma           Electric company
                                           substation in 2016. The battery           owned and operated
                                           charges when there is excess
                                           renewable energy, and discharges        ¡ Energy Storage
                                           during periods of peak demand.            Location:
                                           The system instantaneously                Distribution
                                           responds to increased demand,
                                                                                   ¡ Technology:
                                           providing a buffer while other
                                                                                     Lithium-ion
                                           peaking resources are brought
                                           online. SCE accepted Tesla’s bid in     ¡ Size:
                                           September 2016 and the project            20 MW/80 MWh
came online before the end of the year. The largest battery energy storage
system in the world at the time of its installation, it can store up to 80 mega-   ¡ Duration:
watt hours of energy, enough to power 15,000 homes for four hours.                   04:00 (HH:MM)

                                                                                   ¡ Services:
                                                                                     Energy arbitrage,
                                                                                     renewables
                                                                                     integration, ramping

                                                                                   ¡ Operation Start:
                                                                                     2016

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                                                                              COM PANY

                                                                              ¡ Green Mountain Power

                                                                              L O C AT I O N

Essex Solar and
                                                                              ¡ Essex, Vermont

Storage Microgrid
                                                                              PROJECT
                                                                              OVERVIEW

                                                                              ¡ Business Model:
                                                                                Electric company
One of five Green Mountain Power (GMP) solar-plus-storage projects, the         owned and operated
Essex microgrid combines a 4.5 megawatt solar array that includes 18,326
                                                                              ¡ Energy Storage
solar panels with 2 megawatts of battery storage capacity on 25 acres of
                                                                                Location:
land previously used as a sand pit. The project was approved by Vermont
                                                                                Distribution
regulators in January 2019 and came online in September 2019. GMP has
partnered with solar company Green Lantern Development on the project         ¡ Technology:
construction.                                                                   Solar array,
The integrated solar and battery system reduces overall system costs            Tesla Powerpack
for GMP customers by providing solar-generated electricity at a lower           battery system
price than most other solar sources installed in the state. The system
also provides additional energy grid services such as peak load manage-       ¡ Battery Size:
ment and frequency regulation. The solar and storage facility is designed       Solar – 4.5 MW;
with the potential to island from the distribution system in the event of a     Storage – 2 MW/8 MWh
power outage or disruption using only inverter-based sources. This future     ¡ Duration:
enhancement will provide resiliency to the subset of Essex customers            04:00 (HH:MM)
directly served by this circuit. The solar array provides approximately
8,000 megawatt hours of electricity annually.                                 ¡ Services:
.                                                                               Peak load management,
                                                                                frequency regulation
                                                                                services, renewable
                                                                                energy integration,
                                                                                energy arbitrage,
                                                                                resilience

                                                                              ¡ Operation Start:
                                                                                September 2019

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