June 2021 Leading the Way U.S. Electric Company Investment and Innovation in Energy Storage Leading the Way U.S. ELECTRIC COMPANY INVESTMENT AND INNOVATION IN ENERGY STORAGE 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 New York State Electric & Gas Edison International 8 Aggregated Behind-the-Meter Energy Storage Southern California Edison 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 i Leading the Way U.S. ELECTRIC COMPANY INVESTMENT AND INNOVATION IN ENERGY STORAGE 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 ii Leading the Way U.S. ELECTRIC COMPANY INVESTMENT AND INNOVATION IN ENERGY STORAGE 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. iii Leading the Way U.S. ELECTRIC COMPANY INVESTMENT AND INNOVATION IN ENERGY STORAGE 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, InertiaHarmonics, Response Black Start, Power Quality/ Grid AssetGrid Optimization Frequency Regulation Frequency Emergency BackupEmergency Variable Resources Resources Variable Microgrid SupportMicrogrid Reserve Capacity Spinning ReserveSpinning Energy Arbitrage Energy Voltage Support Voltage Load ShiftingLoad Table shows Integration Operator primary and Owner secondary use cases associated with documented storage projects AES Corporation AES Indiana: Harding Street Battery: Electric Electric Station Battery Transmission Lithium-ion Company Company O Energy Storage System Alliant Energy Decorah Energy Battery: Third Electric Distribution Storage Project Lithium-ion party Company O O O O Marshalltown Battery: Electric Electric Solar Garden Distribution Lithium-ion Company Company O O and Storage Battery: Sauk City Lithium Electric Electric Remote Microgrid Project Ferro 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 Distribution Storage Lithium-ion Company Company O O O Ameren Corporation Ameren Illinois: Battery: Electric Electric Thebes Battery Distribution Lithium-ion Company Company O O Project iv Leading the Way U.S. ELECTRIC COMPANY INVESTMENT AND INNOVATION IN ENERGY STORAGE T or D Energy Energy Upgrade Customer Storage Storage Business Model Wholesale Market Services (Bulk and Ancillary) or Services Technology Location Deferral Harmonics, InertiaHarmonics, Response Black Start, Power Quality/ Grid AssetGrid Optimization Frequency Regulation Frequency Emergency BackupEmergency Variable Resources Resources Variable Microgrid SupportMicrogrid Reserve Capacity Spinning ReserveSpinning Energy Arbitrage Energy Voltage Support Voltage Load ShiftingLoad Table shows Integration Operator primary and 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 Distribution Circuit Deployed Lithium-ion 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 Distribution Peak Shaving Lithium-ion Company Company O O O Pilot Project Berkshire Hathaway Energy MidAmerican Battery: Energy Company: Lithium Electric Electric Knoxville Distribution Ferro 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 Distribution Storage Project Lithium-ion Company Company O O O O v Leading the Way U.S. ELECTRIC COMPANY INVESTMENT AND INNOVATION IN ENERGY STORAGE T or D Energy Energy Upgrade Customer Storage Storage Business Model Wholesale Market Services (Bulk and Ancillary) or Services Technology Location Deferral Harmonics, InertiaHarmonics, Response Black Start, Power Quality/ Grid AssetGrid Optimization Frequency Regulation Frequency Emergency BackupEmergency Variable Resources Resources Variable Microgrid SupportMicrogrid Reserve Capacity Spinning ReserveSpinning Energy Arbitrage Energy Voltage Support Voltage Load ShiftingLoad Table shows Integration Operator primary and Owner secondary use cases associated with documented storage projects Consolidated Edison Company of New York Commercial Customer- Battery Storage Battery: Third Third sited, front- (Beyond Behind- Lithium-ion party party O O O of-the-meter the-Meter) Customer- Gateway Center Battery: Third Third sited, front- Mall Battery Lithium-ion party party O O of-the-meter Ozone Park Battery: Electric Electric Distribution Battery Lithium-ion Company Company O