Enhanced geothermal systems are well suited to store excess renewable power as heat
Geothermal May Beat Batteries for Energy Storage
Enhanced geothermal systems are well suited to store excess renewable power as heat

ISTOCK
GEOTHERMAL ENERGYENERGY STORAGEENHANCED GEOTHERMAL SYSTEMGRID-SCALE ENERGY STORAGE
Geothermal systems carry warmth from Earth’s interior up to the surface for heating or electricity. But geothermal power plants are expensive to build, and will get even less economically viable as wind and solar power get cheaper and more plentiful. However, even as wind and solar grow, so does the need to store electricity from those temperamental sources..
………………. story: https://spectrum.ieee.org/geothermal-energy