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Last Update: 10/26/2026 at 11:33 PM EST
U.S. Grid-Scale Battery Storage
Coverage from Facilities Dive, Utility Dive, and others
U.
S. grid-scale battery storage spans utility projects, solar-plus-storage facilities, corporate power contracts, and the technologies needed to provide capacity beyond periods of sunlight. One example is Mammoth Solar in West Virginia, where MN8 Energy, Google, and Eos Energy Enterprises plan to combine 86 megawatts of solar with lithium-ion and zinc-based long-duration storage on a reclaimed coal mine. Such developments connect renewable generation to regional grids such as PJM while supporting data centers and other large electricity users. The subject also includes manufacturing support and the broader question of how storage can make clean power more dependable.
Looking Back
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History
10/05/2026
Developers now quantify the project’s prospective local economic benefits at about $350 million in investment and 200 construction jobs; these remain estimates.
All Articles36 articles
Important
Google, MN8 Energy, and Eos Energy Enterprises will develop a solar-and-storage project in West Virginia from 2028 to support data centers and regional PJM capacity.
9/9/2026 • Clean Energy & Emissions • General
Google will procure power from MN8 Energy's Mammoth Solar project in West Virginia, combining solar and 350 MWh of storage for regional data centers from 2028 onward.
9/8/2026 • Clean Energy & Emissions • General
Google and Cypress Creek Energy are developing a potential 2.5-gigawatt solar and 2.9-gigawatt-hour storage project in Mississippi County, Arkansas, for completion by 2029.
9/20/2026 • Clean Energy & Emissions • General
Equinor subsidiary East Point Energy has placed the 100-megawatt Citrus Flatts battery storage facility into commercial operation in southern Texas, supporting wind balancing and wholesale market trading.
9/11/2026 • Clean Energy & Emissions • General
Google, esVolta, Quintrace, and LevelTen Energy completed a three-month United States pilot using batteries and hourly certificates to shift solar supply into higher-demand periods.
9/18/2026 • Clean Energy & Emissions • General
Google, MN8 Energy, and Eos Energy Enterprises are developing an 86-megawatt solar project with lithium and zinc storage in Kanawha County, West Virginia, for operation from 2028 through 2030.
9/3/2026 • Clean Energy & Emissions • General
Google, MN8 Energy and Eos Energy Enterprises announced a planned 86-megawatt solar and battery project in Kanawha County, West Virginia, for operation in 2028.
9/3/2026 • Clean Energy & Emissions • General
Quintrace, esVolta, and LevelTen Energy completed a three-month Google-sponsored pilot that shifted 9.2 GWh of solar energy through batteries at United States projects.
9/18/2026 • Clean Energy & Emissions • General
Quintrace, esVolta, LevelTen Energy, and Google completed a three-month United States pilot using hourly certificates to verify battery-shifted renewable energy.
9/17/2026 • Clean Energy & Emissions • General
Google, MN8 Energy, and Eos Energy Enterprises are developing a 436 MWh solar-and-storage project in Kanawha County, West Virginia, with operations beginning in 2028.
9/2/2026 • Clean Energy & Emissions • General
SMT Energy and FlexGen began operating the Houston IV battery facility in Houston, Texas, in 2024, adding 160 megawatts of storage capacity to the ERCOT grid.
9/14/2026 • Clean Energy & Emissions • General
Geronimo Power is developing solar and battery projects and exploring a potential data center in Harmony Township, North Dakota, near Fargo.
9/11/2026 • Clean Energy & Emissions • General
East Point Energy is operating a 100-megawatt lithium-ion battery facility in Harlingen, Texas, to support grid reliability as electricity demand rises.
9/9/2026 • Clean Energy & Emissions • General
SMT Energy, FlexGen Power Systems, and Irby Construction commissioned a 160-MW battery storage facility in Houston, Texas, on September 9, 2026, supporting ERCOT during rising demand.
9/9/2026 • Clean Energy & Emissions • General
SMT Energy, FlexGen, and Irby Construction commissioned the 160-MW SMT Houston IV battery storage facility in six weeks in Houston, Texas, supporting the ERCOT grid.
9/9/2026 • Clean Energy & Emissions • General
Zeo Energy and Fulcrum Point Holdings announced a storage and solar development collaboration in Utah to reduce gas consumption and emissions while supporting reliable commercial power.
9/8/2026 • Clean Energy & Emissions • General
Seven States Power Corporation issued a procurement request in Tennessee for 220 megawatts of distribution-connected batteries with three utility partners, targeting construction in 2027.
9/2/2026 • Clean Energy & Emissions • General
Google, Quintrace, esVolta, and LevelTen Energy completed a three-month pilot using hourly renewable certificates to verify battery storage dispatch and clean energy delivery.
9/17/2026 • Clean Energy & Emissions • General
Georgia Power placed the 128-MW Robins Battery Facility into commercial operation near Warner Robins, Georgia, to store solar energy and support peak-demand grid reliability.
9/16/2026 • Clean Energy & Emissions • General
St. Christopher Episcopal Church, Google, MN8 Energy and Eos Energy Enterprises are advancing solar and battery projects in West Virginia as federal incentives and PJM grid conditions shape deployment.
9/3/2026 • Clean Energy & Emissions • General
MN8 Energy, Google, and Eos Energy Enterprises announced a planned 86 MW solar and 350 MWh storage project in Kanawha County, West Virginia, to supply dispatchable clean power to the PJM grid from 2028.
9/2/2026 • Clean Energy & Emissions • General
Equinor began commercial operations in Harlingen, Texas, on a 100 MW/200 MWh battery facility managed in the ERCOT market by Danske Commodities.
9/4/2026 • Clean Energy & Emissions • General
Interesting
Google, esVolta, Quintrace, and LevelTen Energy completed a three-month United States pilot using batteries to shift solar electricity and hourly renewable attributes during demand gaps.
9/18/2026 • Markets & Industry & Innovation • General
Eos Energy Enterprises received an $87 million Department of Energy loan advance on September 15 for its Thorn Hill zinc battery facility in Warrendale, Pennsylvania.
9/15/2026 • Clean Energy & Emissions • General
East Point Energy began commercial operations at the 100 MW Citrus Flatts battery facility in Harlingen, Texas, expanding Equinor's merchant storage portfolio in ERCOT.
9/6/2026 • Clean Energy & Emissions • General
East Point Energy completed Citrus Flatts, a 100 MW/200 MWh battery facility, in Harlingen, Texas, amid rising Texas electricity demand.
9/5/2026 • Clean Energy & Emissions • General
East Point Energy began commercial operation of the 100 MW Citrus Flatts battery in Harlingen, Texas, providing renewable balancing and ancillary services across ERCOT.
9/4/2026 • Clean Energy & Emissions • General
MN8 Energy and Google announced plans for a $350 million solar and battery storage facility in Cannelton, West Virginia, with construction scheduled for 2027.
9/3/2026 • Clean Energy & Emissions • General
MN8 Energy, Eos Energy Enterprises, and Google announced a planned solar and storage facility in Kanawha County, West Virginia, with operations scheduled to begin in 2028.
9/3/2026 • Clean Energy & Emissions • General
MN8 Energy, Google, and Eos Energy Enterprises announced a West Virginia project combining 86 MW of solar with 380 MWh of storage for dispatchable clean power on the PJM grid.
9/2/2026 • Clean Energy & Emissions • General
MN8 Energy, Google, and Eos Energy Enterprises announced a West Virginia solar-and-storage project that will supply Google's regional data centers through the PJM grid from 2028.
9/2/2026 • Clean Energy & Emissions • General
MN8 Energy, Google, and Eos Energy Enterprises announced a planned 86 MW solar and 380 MWh storage project in Kanawha County, West Virginia, for the PJM grid.
9/2/2026 • Clean Energy & Emissions • General
Georgia Power began commercial operation of the 128-megawatt Robins Battery Facility near Warner Robins, Georgia, to shift solar electricity during peak demand.
9/16/2026 • Clean Energy & Emissions • General
Georgia Power placed its 128-MW Robins Battery Facility into commercial operation at Robins Air Force Base in Warner Robins, Georgia.
9/15/2026 • Clean Energy & Emissions • General
Equinor’s East Point Energy began commercial operation of the 100 MW Citrus Flatts battery in Harlingen, Texas, adding flexible capacity to the ERCOT grid.
9/3/2026 • Clean Energy & Emissions • General
East Point Energy, an Equinor company, started commercial operations at the 100 MW/200 MWh Citrus Flatts battery facility in Harlingen, Texas, strengthening ERCOT energy storage capacity.
9/8/2026 • Clean Energy & Emissions • General