This Texas geothermal startup is storing energy in the ground

Sage Geosystems says its earthen battery” system, now undergoing pilot tests in Texas, could be used to store energy to help balance power grids.

Maria Gallucci  . 

Four people wearing white hard hats stand on a dusty field with drilling equipment in the background.
Sage Geosystems CEO Cindy Taff, shown second from right, stands with her team at the Texas test site. (Sage Geosystems)