Comment by meindnoch

But is it really 1 MWh of _electricity_, or could you replace a good chunk of that with a huge tank of boiling water? In the winter, about half of my electricity consumption goes to my heat pump, to produce 45-50C water for heating and tap water. But if we could increase the reservoir temperature to 95C (or even go superheated to 160C at 6 bar), then it could supply the 45-50C flow temperature much longer without needing to recharge.