Pioneering Rondo heat battery begins operation

March 10, 2023

Rondo Energy and Calgren Renewable Fuels have confirmed that a 2MWh Rondo Heat Battery at Calgren’s facility in Pixley, California – described as “the first electric thermal energy storage (ETES) system in commercial operation in the US” – is up and running.

The Rondo Heat Battery captures intermittent renewable electricity, stores it at very high temperatures in brick materials, and delivers continuous industrial heat on demand. 

The battery has been described as a “milestone both for energy storage and for the future of ethanol production” because the installation is the highest temperature ETES system in commercial operation worldwide, according to Rondo, storing and transferring energy above 1,000°C.