Q4 · UPSC current affairs · 5 September 2026 · News · Mandatory Battery Energy Storage Systems Renewable Projects

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What is the primary function of a Battery Energy Storage System (BESS) in high-renewable energy grids?

A To generate continuous raw coal for thermal power plants
B To store excess renewable energy for dispatch during peak hours
C To directly replace all grid-forming inverters with mechanical flywheels
D To absorb carbon dioxide emissions directly from the atmosphere

Correct answer: (b) To store excess renewable energy for dispatch during peak hours

Explanation

BESS is utilized to store excess renewable energy generated during off-peak or high-generation periods and dispatch it during peak hours to ensure grid stability. The other options do not describe the function of a BESS.

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