ESS Tech, Inc. (NYSE:GWH) shares soared 15.01% to $1 in after-hours trading on Tuesday.
In the regular session, the stock of the clean energy company that specializes in non-lithium battery technology climbed 7.88% to $0.87.
Bridge Launch Sparks Rally
The stock move follows the company’s announcement last week of ESS Bridge, a modular sodium-ion battery energy storage system (BESS) designed to serve utilities, AI-driven data centers and industrial customers.
According to the ESS Tech, the Bridge system provides 1.2 MWh of storage capacity per unit and can be expanded up to 4.8 MWh. It is designed to operate for 20 years and is engineered to prevent fire risks associated with thermal runaway, unlike conventional lithium-ion systems.
