Pull to refresh
Logo
Google backs West Virginia solar-plus-storage project pairing lithium and zinc batteries

Google backs West Virginia solar-plus-storage project pairing lithium and zinc batteries

New Capabilities

MN8'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 partnership

Overview

Updated 55 minutes ago

Google 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.

Questions about this story

Free account needed to ask — your question is kept and asked for you right after sign-up. Answers are public.

No questions yet — be the first to ask.

Key Indicators

$350M
Capital investment
MN8's estimate for the Mammoth Solar build-out on a reclaimed coal mine.
86 MW
Solar capacity
Utility-scale solar array at the center of the project.
280 MWh
Lithium-ion storage
Four-hour battery paired with the solar array.
100 MWh
Zinc long-duration storage
10-hour Eos Z3 system, the project's novel component.
~200
Construction jobs
Estimated jobs during the build phase, plus operating roles afterward.

Voices

Curated perspectives — historical figures and your fellow readers.

Ever wondered what historical figures would say about today's headlines?

Sign up to generate historical perspectives on this story.

Play

Exploring all sides of a story is often best achieved with Play.

Most of these play right now — no account needed. Sign up to save scores, keep a streak, and unlock Debate and Predict. Log in Sign Up
Predict 3 ways this could play out. Back the one you believe — contrarian picks score more when a scenario has a resolution date. Log in to play

People Involved

Organizations Involved

Timeline

November 2025 September 2026

3 events Latest: 2 days ago
  1. MN8, Google, and Eos launch $350M storage partnership

    Latest Announcement

    MN8 will build 86 MW solar with lithium and zinc storage; Google buys the output.

  2. Google buys West Virginia land for data center

    Corporate

    Google purchases land near Buffalo for a planned data center campus.

  3. Mammoth Solar wins state approval

    Regulatory

    West 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.

December 2017

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.

Then

The battery sharply cut the region's grid stabilization costs and delivered a fast grid response that gas plants could not match.

Now

It kicked off a global build-out of grid-scale lithium batteries that is now the default clean firming technology.

Why this matters now

Like Hornsdale proved lithium batteries at scale, Mammoth Solar is the proof-of-scale test for zinc-based long-duration storage.

September 2020

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.

Then

The pledge pushed Google to sign deals that pair renewables with storage instead of buying plain energy credits.

Now

It became a template for hyperscaler procurement and a major demand signal for firm clean power.

Why this matters now

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.

2024-2025

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.

Then

The pilots showed a lower-cost, longer-duration chemistry operating on real grids.

Now

Iron-air competes with zinc, flow, and other chemistries to fill the gap between four-hour lithium and seasonal storage.

Why this matters now

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.

Sources

(8)