With data centers projected to consume as much as 12% of total US electricity by 2028, Noon Energy says it has hit a key milestone: successfully operating a scaled-up, ultra-long-duration energy storage system for thousands of hours, capable of delivering clean power continuously for more than 100 hours at a time.

The company’s reversible solid oxide fuel cell battery exceeded 200 hours of storage in some tests and, according to Noon Energy, is the first fully containerized, modular ultra‑long‑duration energy storage (LDES) system to prove long‑term operation at that scale.

One approach developers are turning to is so‑called bring‑your‑own‑generation, where onsite renewable energy is paired with battery storage. The catch is that most lithium‑ion systems only deliver power for two to 10 hours. Pairing those short‑duration batteries with a Noon system – which the company says offers roughly 50 times the energy capacity of conventional lithium‑ion storage – is intended to create a lower‑cost, higher‑performance setup for large energy users like data centers. In this configuration, Noon’s battery covers multi‑day gaps, while lithium‑ion systems handle fast swings and peak demand.

That kind of duration matters as electricity demand surges, especially from data centers being built to support AI, pushing developers to look beyond the grid for reliable power.

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“We are excited to have commissioned our multi‑module demonstration system and demonstrated its lifetime,” said Chris Graves, Noon Energy’s co‑founder and CEO. “This is a key milestone for our breakthrough technology’s scale‑up.”

Graves added that the company has already built a larger, commercial‑scale system that’s expected to be commissioned soon. He said Noon Energy’s technology is designed to deliver low‑cost, clean power to hyperscalers and other fast‑growing industrial loads.

At the core of Noon Energy’s system is a rechargeable, carbon‑based battery that stores energy by converting CO2 into a fuel, then converts it back into electricity during discharge. The company says this approach allows intermittent renewable energy to provide consistent 24/7 power.

Noon Energy also points to a compact design and a domestic‑leaning supply chain. According to the company, its system has a 200 times smaller footprint than flow batteries or pumped hydro and uses about 1% of the critical elements required for lithium‑ion batteries, reducing exposure to supply‑chain and geopolitical risks.

The demo system is now operating with support from the California Energy Commission. Noon Energy says more details on its commercial deployment will be released soon.

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