November 16, 2025: Peak Energy is to supply up to 4.75GWh of its sodium-ion battery energy storage systems to BlackRock-backed Jupiter Power.
US-based Peak said on November 12 the BESS systems are to be introduced between 2027 and 2030 with a total contract value worth more than $500 million.

Project locations were not disclosed, but Jupiter is focused on utility-scale BESS facilities operating or in construction in the US, with a pipeline of over 11,000 MW in active development.

Under the agreement, Peak will deliver around 720MWh of storage in 2027, which it said marked the largest ever single deployment of sodium ion batteries announced to date.

There is an option to deliver a further 4GWh under a capacity reservation scheme.

Peak, which was founded by industry veterans from Tesla, Enovix and Apple, said its technology involves a fully passive cooling system for safer operation and eliminates many of the parts required by current lithium ion BESS tech.

Sodium ion batteries promise less degradation over their lifetime and reduced operations and maintenance costs compared to Li systems on the market today, according to Peak.

The company has said previously its design system eliminates active cooling, reduces moving parts, and extends battery life, cutting lifetime costs by more than $100 million for a typical project deployment.

The deal with Jupiter comes just weeks after Peak announced the start-up of its demonstration 3.1MWh NFPP (or sodium ferric pyrophosphate system) at the Solar Technology Acceleration Center, near Denver International Airport.