Energy Vault’s 1.25 GW agreement with a hyperscaler in Texas marks the largest single gravity-storage commitment to date and signals that non-lithium long-duration technologies are moving from pilot scale into the procurement mainstream for AI-driven load growth.
Gravity storage enters the hyperscaler procurement tier
Energy Vault, a Swiss-founded system integrator that went public via SPAC in 2022, has built its commercial proposition around the EVx platform – a modular, crane-based gravity system that lifts and lowers composite blocks to store and discharge electricity. Until now, deployed projects have ranged from tens of megawatts to a few hundred megawatts, mostly in China and Australia. The Texas agreement, described as a “strategic agreement supporting hyperscaler AI data centres,” jumps an order of magnitude to 1.25 GW of power infrastructure. The announcement does not disclose the customer name, the exact technology mix, or whether the full capacity is gravity storage, but the scale implies a multi-phase rollout rather than a single-site installation.
Texas is the epicenter of U.S. data-center growth, with ERCOT interconnection queues showing more than 50 GW of large-load requests tied to computing campuses. Hyperscalers – Microsoft, Google, Amazon, Meta – have publicly committed to 24/7 carbon-free energy matching and are actively seeking firm, multi-hour storage that can shift daytime solar or wind into overnight server loads without relying on lithium-ion’s four-hour economic limit. Energy Vault’s pitch is that its gravity system delivers 8-16 hours of duration at a levelized cost of storage below lithium for long-duration applications, with no degradation over a 35-year design life.
Why this deal reshapes the long-duration storage competitive landscape
If the 1.25 GW figure represents firm, contracted capacity – not just a memorandum of understanding – it would instantly make Energy Vault the largest non-lithium long-duration storage provider by contracted pipeline in North America. For context, Form Energy’s iron-air projects with Georgia Power and Xcel Energy total roughly 1.5 GW combined, but those are regulated-utility procurements with multi-year regulatory timelines. A hyperscaler deal in Texas can move from signature to steel-in-ground in 18-24 months because it bypasses integrated resource plan cycles and leans on private-site interconnection or behind-the-meter configurations.
That speed matters. ERCOT’s reserve margins are tightening as thermal retirements outpace dispatchable additions, and the PUCT’s new Performance Credit Mechanism still lacks a defined storage eligibility framework. Hyperscalers willing to self-supply firm capacity reduce their exposure to scarcity pricing events – like the January 2025 cold snap where real-time prices hit the $5,000/MWh cap for dozens of hours – while simultaneously meeting Scope 2 emissions targets. Energy Vault’s modular block design also sidesteps the critical-mineral supply chain constraints that affect lithium, vanadium, and even iron-air chemistries, a factor that procurement teams now weight heavily after the 2022-2023 battery-grade lithium carbonate price spike.
My analysis: if Energy Vault can deliver the first 200-300 MW phase at a fixed price below $150/kWh installed – a figure the company has cited in investor decks for mature EVx deployments – it would undercut the all-in cost of 8-hour lithium systems by roughly 30% based on current EPC quotes. That pricing threshold is the inflection point where corporate buyers shift from “pilot a novel technology” to “standardize across the fleet.”
Who this affects
- Utility planner: A 1.25 GW behind-the-meter or co-located gravity portfolio reduces net peak demand on ERCOT transmission corridors serving data-center clusters, potentially deferring $200-400 million in transmission upgrades per GW of load.
- Storage developer: Validates gravity storage as a bankable, multi-hour alternative to lithium for corporate offtakers; expect competing LDES vendors (iron-air, flow battery, thermal) to accelerate hyperscaler outreach with comparable duration claims.
- Policy analyst: Demonstrates that private procurement can deploy long-duration storage faster than state mandates – Texas has no LDES procurement target – creating a de facto market signal for FERC Order 841/2222 participation rules.
- Investor: Watch for Energy Vault’s next quarterly revenue recognition schedule; a 1.25 GW pipeline at $150/kWh implies ~$187 million in equipment revenue per GW, but margins depend on EPC execution risk in a tight Texas labor market.
What to watch next
- Permitting and interconnection filings at the county and ERCOT level – the first 200-300 MW phase should appear in the GIS or MIS queues within 90 days if the timeline is real.
- Disclosure of the hyperscaler counterparty; a named Fortune 500 buyer would trigger follow-on RFPs from peers with similar 24/7 CFE deadlines (2030 for Google and Microsoft, 2040 for Amazon).
- Field performance data from the first commercial EVx towers in China (Rudong, 100 MWh) and Australia (BHP, 180 MWh) – round-trip efficiency, O&M cost, and block-cycle durability at scale.
- Cost breakdown in Energy Vault’s 2025 10-K: gross margin per GW delivered, warranty reserve assumptions, and any take-or-pay provisions that de-risk revenue recognition.
Bottom line: A 1.25 GW gravity-storage commitment from a hyperscaler in Texas is the clearest signal yet that corporate buyers are ready to pay for multi-hour firm capacity without lithium’s duration ceiling – if the first phase delivers on cost and schedule, the LDES market shifts from technology validation to volume procurement.
Read the full report at Energy Storage News
Note: facts and figures attributed above to Energy Storage News reflect that outlet's original reporting. Broader context, cross-sector connections, and forward-looking scenarios reflect independent analysis by our editorial team.
About this article: Drafted by Energy Ai with AI-assisted research and writing based on public reporting, then reviewed under our editorial process before publication.
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