Endeavour, the owner of data center firm Edged and cooling firm ThermalWorks, is to offer sodium batteries to data centers.

The company this week announced a strategic partnership with battery maker Tiamat to deliver sodium-based energy storage for AI data centers and grid applications.

Endeavour said Tiamat’s sodium-based battery technology can fully charge and discharge at rates exceeding 60 times in one hour (60 C-rate) – surpassing typical lithium-ion batteries (1-3 C-rate).

The company said this responsiveness, coupled with a long life and high energy density, makes these batteries suited to manage volatile AI compute loads – while avoiding thermal runway.

“We are scaling the next generation of inverters and power routers capable of managing complex AI data center loads and enabling greater grid stability,” said Endeavour CEO Jakob Carnemark. “Tiamat’s battery chemistry is unique among other sodium chemistries. The batteries are currently being manufactured and have been tested by Endeavour over the last year on real-world AI workloads and complex grid transients for hundreds of thousands of cycles. We look forward to working with Tiamat to scale the solution globally and continue to support their growth.”

Tiamat was founded in 2017 in Amiens, France. Its batteries will be used by Endeavour, including in its Edged data centers, and will be made available exclusively through Endeavour to other innovators and hyperscalers.

“We are extremely pleased with this partnership, which provides long-term support from Endeavour and unique technology collaboration,” says Hervé Beuffe, CEO of Tiamat. “It marks the culmination of many years of hard work developing our breakthrough technology for power applications. Over the last year of testing, it became clear that our battery technology was the only one currently capable of managing the complex loading and durability requirements that Endeavour’s engineers were looking to solve.”

Endeavour was set up by Aligned founder Jakob Carnemark. Its Edged unit has data centers either operating or in development in Bilbao, Madrid, and Barcelona in Spain; Lisbon, Portugal; and across the US, including Missouri, Arizona, Texas, Georgia, Iowa, Ohio, and Illinois.

Endeavour’s ThermalWorks waterless cooling system can reportedly support rack densities of up to 70kW with air cooling and 200kW with liquid cooling.