The firm models nonstop production of hydrogen every summer, using electrolysis units powered by market electricity. The hydrogen would be compressed and stored underground in salt caverns or depleted gas fields, and the following winter would be converted nonstop to electricity, using fuel cells.
Daily balancing would be achieved using batteries and pumped hydro. To the extent the entire grid ran on renewables in the summer, the hydrogen would be “green,” or renewably produced - Link
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