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AI data centers push grid batteries past the 4-hour ceiling

AI data centers push grid batteries past the 4-hour ceiling

Money Moves

Google signed for 100-hour iron-air storage in Minnesota and a zinc array in West Virginia; Meta reserved up to 100 GWh from Noon Energy

September 18th, 2026: Google and esVolta complete battery 'time-shift' storage pilot

Overview

Updated Sep 18

Grid batteries came with a four-hour ceiling. Now the companies with the fastest-growing electricity demand on Earth, the AI data-center operators, are buying batteries that discharge for 10 hours and, in one case, 100: Meta reserved up to 100 gigawatt-hours from Noon Energy, while Google contracted a 300-megawatt iron-air system in Minnesota and a zinc array in West Virginia.

The purchases are a capital lifeline for long-duration energy storage (LDES), a category that struggled to find buyers once lithium-ion became the grid default. Scaled, 10- to 100-hour batteries could replace natural-gas peaker plants and let renewables carry the grid around the clock; if they stall, AI's appetite keeps falling on fossil fuel.

Why it matters

AI data centers are long-duration batteries' first big customers; if the tech scales, renewables can displace gas peaker plants.

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Key Indicators

150 GWh
U.S. long-duration storage projects announced since early 2025
More than five times the LDES capacity planned at the end of 2024; most serves AI data centers.
100 GWh
Meta's reserved storage from Noon Energy
About 100 hours of power at 1 GW; first phase scheduled by 2028.
300 MW
Google's Minnesota iron-air battery
Form Energy system able to dispatch up to 100 hours; installation planned for 2028.
$350M
Capital investment in West Virginia project
MN8's solar-plus-storage build on a reclaimed coal mine; Google buys its output.

Voices

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People Involved

LT
Lucia Tian
Google Director of Advanced Energy Technologies
Leading Google's long-duration storage procurement
 Amanda Yang
Amanda Yang
Meta Head of Clean and Renewable Energy
Signed Meta's offtake with Noon Energy
MJ
Mateo Jaramillo
Co-founder and Chief Executive, Form Energy
Deploying first hyperscaler iron-air project in Minnesota

Organizations Involved

Google
Google
Technology company
Largest corporate buyer of renewable energy; signing LDES deals

Google has committed to powering data centers on 24/7 carbon-free energy by 2030, matching 100% of annual consumption but only about 65% hourly.
Meta
Meta
Technology company
Reserved 1 GW / 100 GWh from Noon Energy

Meta has reserved up to 1 GW / 100 GWh of storage from Noon Energy, with the first phase due by 2028.
Noon Energy
Noon Energy
Battery startup
Building Meta's 100 GWh order

California-based startup developing low-cost storage that discharges for days; Meta's offtake is its largest order.
Form Energy
Form Energy
Battery manufacturer
Building 300 MW iron-air system in Minnesota

Somerville, Massachusetts company building iron-air batteries that discharge up to 100 hours.
Eos Energy Enterprises
Eos Energy Enterprises
Public battery manufacturer (NASDAQ: EOSE)
Supplying 10 MW / 100 MWh zinc system in West Virginia

U.S. maker of zinc-based Z3 batteries providing 10 hours of storage.
MN8 Energy
MN8 Energy
Power platform
Owner-operator of the West Virginia project

Develops and operates utility-scale solar and storage; put $350 million into the West Virginia build.
Energy Dome
Energy Dome
Energy storage startup
Building 19 MW CO2 battery in Arizona

Italian company whose CO2 battery compresses the gas to store energy, then expands it to drive a turbine.

Timeline

February 2026 September 2026

3 events Latest: September 18th, 2026 · 2 months ago

  1. Google and esVolta complete battery 'time-shift' storage pilot

    Latest Pilot

    Shifted 9.2 GWh of solar using hourly-verified renewable certificates to match Google demand.

  2. Google, MN8, Eos unveil West Virginia solar-plus-storage on reclaimed coal mine

    Deal

    Pairs 86 MW solar with 10-hour zinc and 4-hour lithium storage; $350 million.

  3. Google, Xcel, Form Energy plan 300 MW iron-air battery in Minnesota

    Deal

    100-hour system anchors 1.6 GW of wind-solar; first hyperscaler contract for Form.

Scenarios

1

Meta's 100-hour battery ships on time

Possible Resolves by End of 2028

Discussed by: Energy analysts tracking Noon Energy's offtake

Noon Energy commissions the first phase of its 1 GW / 100 GWh system for Meta by 2028. Delivery proves multi-day storage can be manufactured at scale, gives LDES a reference project, and pulls other hyperscalers into similar deals.

2

Duration pays off on the Minnesota grid

Possible Resolves by Q2 2029

Discussed by: Fortune and energy analysts watching Form Energy

Form Energy's 300 MW Minnesota iron-air system with Google and Xcel enters service in 2028 and dispatches for up to 100 hours through summer peaks and storm events. Iron-air becomes the industry's chosen multi-day chemistry, driving down cost per megawatt-hour.

3

Grid markets start pricing duration

Possible Resolves by Q2 2027

Discussed by: Energy economists; FERC and PJM market-reform proposals

FERC or PJM adopts capacity-market rules that compensate 10-hour-plus resources for their duration value, not just installed megawatts. LDES becomes financeable without a single corporate buyer, opening the market beyond hyperscalers and utilities.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

December 2017

Hornsdale Power Reserve (2017)

South Australia commissioned Tesla's 100 MW lithium-ion battery next to a wind farm after a statewide blackout. The project was built in under 100 days, the first grid-scale battery of its kind.

Then

It cut grid frequency-regulation costs within months and triggered a global boom in lithium-ion storage.

Now

The project set the four-hour duration standard that still dominates grid batteries today.

Why this matters now

Hornsdale showed one big buyer can launch a storage-technology class. The same dynamic now seeds long-duration storage.

2010-2020

Corporate renewable power-purchase agreements (2010s)

Google, Microsoft, and Facebook signed multi-year power-purchase agreements for wind and solar, promising developers a fixed revenue stream for decades.

Then

Developers got bankable contracts; wind and solar prices fell by 60-90% over the decade.

Now

Corporate procurement became a core driver of the renewables buildout and 24/7 clean-energy matching.

Why this matters now

The same purchase-anchor model, now applied to unproven 10- to 100-hour batteries, is the mechanism behind the current LDES wave.

October 2015-February 2016

Aliso Canyon gas leak (2015-2016)

A methane leak at Southern California Gas's Aliso Canyon storage field threatened winter electricity supply for Los Angeles. Regulators ordered utilities to fast-track battery storage to compensate.

Then

California deployed roughly 100 megawatts of battery storage within months, far faster than any gas asset could come online.

Now

The episode demonstrated storage's speed advantage and seeded California's storage market.

Why this matters now

Like AI's power demand today, a supply emergency compressed regulators' and utilities' tolerance for unproven storage technology.

Sources

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+5
Bloomberg Google Blog Bloomberg Law RCR Wireless News pv magazine biggo Fortune M-Grid Solar Now / Energy-Storage.News GlobeNewswire Reddit r/energy