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How a grid battery earns money by shifting energy
The prompt
A 100 MWh battery in Europe charges when power costs USD 20 per MWh and sells in the evening peak at USD 90 per MWh. It loses 15 percent of the energy in the round trip (85 percent efficiency). It completes 300 full cycles a year. What is its gross margin per cycle and per year, in USD?
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