Google backs West Virginia solar-plus-storage project pairing lithium and zinc batteries
New CapabilitiesMN8's Mammoth Solar pairs 86 MW of solar with lithium and zinc storage to firm up regional data center power
2 days ago: MN8, Google, and Eos launch $350M storage partnershipNew here? Follow stories to track developments over time. Create a free account to get updates when stories you care about change.
Overview
Updated 55 minutes agoGoogle is buying the electricity from a $350 million solar-plus-storage project on a reclaimed West Virginia coal mine. Developer MN8 Energy will pair 86 megawatts of solar with lithium-ion batteries and the state's first commercial-scale zinc long-duration storage system.
Data center power demand is straining the East Coast's PJM grid. This project tests whether solar can deliver around-the-clock clean power instead of new gas turbines.
Why it matters
If this works, hyperscalers get a template for round-the-clock clean power without new gas turbines.
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People Involved
Organizations Involved
Renewable energy developer spun out of Goldman Sachs, running about $6 billion of U.S. power assets.
Hyperscaler with data centers across the PJM region and a 2030 goal of round-the-clock carbon-free energy.
U.S. maker of zinc-based long-duration batteries, listed on Nasdaq as EOSE, manufacturing in Pennsylvania.
Operator of the largest U.S. power grid, spanning 13 states plus the District of Columbia.
Timeline
November 2025 September 2026
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MN8, Google, and Eos launch $350M storage partnership
Latest AnnouncementMN8 will build 86 MW solar with lithium and zinc storage; Google buys the output.
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Google buys West Virginia land for data center
CorporateGoogle purchases land near Buffalo for a planned data center campus.
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Mammoth Solar wins state approval
RegulatoryWest Virginia's utility regulator approves the 86 MW solar project on a reclaimed mine.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
Hornsdale Power Reserve (2017)
Tesla installed a 100-megawatt lithium battery in South Australia, the largest grid battery in the world at the time, built in under 100 days after a state-wide blackout.
The battery sharply cut the region's grid stabilization costs and delivered a fast grid response that gas plants could not match.
It kicked off a global build-out of grid-scale lithium batteries that is now the default clean firming technology.
Like Hornsdale proved lithium batteries at scale, Mammoth Solar is the proof-of-scale test for zinc-based long-duration storage.
Google's 24/7 carbon-free energy pledge (2020)
Google committed to run every data center on carbon-free energy every hour of every day by 2030, replacing annual matching with hourly matching.
The pledge pushed Google to sign deals that pair renewables with storage instead of buying plain energy credits.
It became a template for hyperscaler procurement and a major demand signal for firm clean power.
The West Virginia project is a direct outgrowth: Google buys the project's energy, capacity, and attributes together to firm around-the-clock supply for its data centers.
Form Energy iron-air pilots (2024-2025)
Form Energy began installing iron-air batteries that discharge for up to 100 hours, with first commercial pilots at Minnesota utilities including Great River Energy and Xcel Energy.
The pilots showed a lower-cost, longer-duration chemistry operating on real grids.
Iron-air competes with zinc, flow, and other chemistries to fill the gap between four-hour lithium and seasonal storage.
Mammoth Solar's 10-hour zinc system runs the same race at commercial scale, and its outcome will help decide which long-duration chemistry earns utility commitments.
