On Friday, Southern California utility San Diego Gas & Electric (SDG&E) held a small press conference in Escondido to show off its brand new energy storage facility, a 30MW battery system capable of storing 120MWh of energy, which can serve 20,000 customers for four hours. SDG&E also introduced a 7.5MW battery system built in El Cajon, CA.
H/t reader kevin a:
“A tonne of coal produces roughly 2 MWh of energy i.e. 2 MW for an hour.
60 tonne of coal for 120MWH power
coal is 50$ tonne *60 = $3000 an hour for coal.
Lithium cost about 20,000 a tonne.”
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