• Hirom@beehaw.org
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    5 days ago

    Pornainen’s battery is charged using electricity from the grid

    How so, do they use heater resistors or a heat pump?

    Electricity may be cheap sometimes but still, heater resistors aren’t the most efficient.

    • perestroika@slrpnk.net
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      4 days ago

      They use resistive heating, so they can only charge it dirt cheap when there is surplus solar or wind.

      • Hirom@beehaw.org
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        4 days ago

        Okay, I guess the heat pumps aren’t suitable due to the economics or maybe cannot reach high enough temperatures.