It's as simple as supply-and-demand. There's more energy being produced during the day (thank you, sunshine) and therefore we should use that energy before there's waste.
Stanford University study suggests people should charge EVs during day, not overnight
Today, California has excess electricity during late mornings and early afternoons, thanks mainly to its solar capacity. If most EVs were to charge during these times, then the cheap power would be used instead of wasted.
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