GeoTES enables large-scale energy storage in reservoirs, demonstrating potential for direct heating and electricity generation.
Geological thermal energy storage (GeoTES) is an emerging technology that addresses the critical need for large-scale, long-duration energy storage. GeoTES stores thermal energy in geological formations, enabling later use for direct heating, cooling, or electricity generation. We describe characteristics of viable formations and estimate the energy capacity of four reservoirs in the United States to illustrate the immense storage potential of GeoTES – on the scale of terawatt-hours per formation.
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Witter et al. (2026) studied this question.
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