U.S. Electric Company Investment and Innovation in Energy Storage - Leading the Way
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June 2021 Leading the Way U.S. Electric Company Investment and Innovation in Energy Storage
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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U. S . E LEC TRIC COM PANY I NVE STM E NT
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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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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 . 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
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 . 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
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 . 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
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 . 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
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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U. S . E LEC TRIC COM PANY I NVE STM E NT
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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.
1Leading the Way
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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
2Leading the Way
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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
3Leading the Way
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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
4Leading the Way
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COM PANY
¡ 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
6Leading the Way
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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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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
¡ 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
8Leading the Way
U. S . E LEC TRIC COM PANY I NVE STM E NT
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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
9Leading 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
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
10Leading 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
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
11Leading 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
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
12Leading 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
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
13Leading 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
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
14Leading 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
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
15Leading 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
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
16Leading 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
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
17Leading 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
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.
18Leading 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
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
19Leading 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
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
20Leading 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
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
21Leading 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
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
22Leading 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
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
23Leading 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
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
24Leading 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
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
25Leading 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
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
26Leading 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
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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