It doesn't cost me all that much more than my heat pump. I believe I pay 9.7 cents per kWh.

If you are already using electric space heaters to supplement specific rooms it's a roughly 1:1 exchange but with the added benefit of mining a bitcoin subsidy. Depending how you do it. You could save electricity overall by lowering your whole-house thermostat and simply plugging the s9 into the sp...