Which grid-scale renewable energy storage system uses surplus electricity to pump water to a higher elevation reservoir, releasing it through turbines during peak demand?

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A Concentrated solar thermal
B Hydrogen fuel cell network
C Pumped-storage hydropower
D Flywheel kinetic storage

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Answer: C. Pumped-storage hydropower

• Answer: C) Pumped-storage hydropower
• Explanation: Pumped-storage hydropower acts like a giant gravitational battery, storing mechanical energy in water elevations and converting it to electricity instantly when needed.

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Which grid-scale renewable energy storage system uses surplus electricity to pump water to a higher elevation reservoir, releasing it through turbines during peak demand?

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