The firm has proved its thermal batteries can store energy in carbon blocks. It will use this latest round to scale commercial viability.

Fourth Power has raised $20 million to build a demonstration version of its thermal batteries, which ultimately could store ...

Catalyze adds community solar, Enel inks PPAs, Jupiter Power celebrates a Michigan BESS; Fourth Power, Nexamp, and Sol Systems raise funds.

Offensive coordinator Bobby Petrino, a former head coach at Arkansas before he left in scandal, is interested in the ...