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submitted 2 weeks ago by [email protected] to c/[email protected]

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[–] [email protected] 0 points 2 weeks ago (2 children)

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.

[–] [email protected] 0 points 2 weeks ago (1 children)

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

[–] [email protected] 0 points 2 weeks ago

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