Battery Storage
Electrochemical devices storing electrical energy for later use, essential for managing renewable energy intermittency.
Formula
Round-trip Efficiency (%) = (Energy Output ÷ Energy Input) × 100
Real World
Tesla's Megapack batteries are deployed at the Moss Landing facility in California, storing excess solar energy during the day and discharging it to the grid during evening peak demand, reducing reliance on gas peaker plants.
Exam Focus
When evaluating battery storage, always address both efficiency and cost decline — examiners reward balanced analysis of benefits and limitations.
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