• XiaCobolt [she/her]@hexbear.net
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    12 天前

    the energy has to come from somewhere

    The car is making electricity when driving lights on or off. If the battery is full it’s lost to waste.

    • Xavienth@lemmygrad.ml
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      11 天前

      If the battery is full the alternator doesn’t output any significant current. It doesn’t provide any extra load to the engine.