Industrial firms looking to electrify using renewable energy need cheap and efficient batteries to handle intermittency.

The National Renewable Energy Laboratory is testing a prototype for thermal energy storage using solar and wind power, plus silica sand. Here's how it works.

First-of-its-Kind Energy Storage: This is the first electric thermal energy storage (ETES) system in commercial operation in the U.S. ETES technologies are an important new tool for ...

Brenmiller Energy is among the most experienced players in thermal energy storage. The company, founded in 2011, makes modular systems that use crushed rocks to store heat.