In short:
- Sage Geosystems is developing the first commercial geothermal energy storage system in South Texas, using pressurized water in underground caverns.
- The technique involves injecting water underground, which is then released to generate power during peak demand, offering up to 10 hours of energy storage.
- This system, while still in early stages, could provide an alternative to lithium-ion batteries, which currently dominate the energy storage market.
Key quote:
"There is a growing need for technologies that can adjust generation levels to maintain grid stability. The technology Sage is developing has the potential to be a game changer."
— Yiyi Zhou, an energy analyst at BloombergNEF
Why this matters:
Renewable energy storage is crucial for maintaining grid stability as solar and wind power become more prevalent. This technology could diversify storage options, reducing dependency on scarce lithium resources.
Related: Energy storage surge reshapes US electricity landscape
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