I'm sure most people would be very pleased to heat their house on 12kwh for the year ... think there might be a few orders of magnitude need added to that.
🙂
K
Oops, yes, it's MWh,not KWh
https://assets.publishing.service.g...old-Energy-Consumption-Affordability.pdfSo that would mean our sand battery would have to deliver 10MW, which might be possible given the heat capacity, but I suspect it would only really work for many fewer homes - or of course you could have a bigger pile of sand!