And I wouldn’t know the power was out
To run a 300 watt heater 2 days would be 130 ish amp hours. Not crazy big, but yes, a lot bigger than the 18 the ecotech ones have. Powerwall would be sweet for sure. Jealous of @JVU a bitYou would have to have massive batteries to run heaters for multiple days. Most pumps are much easier. But still, multi day battery backup would be pretty big. Or you need fancy batteries like the tesla powerwall.
I have been thinking of getting something. Powerwall would be i think 10-15k haven't looked into auto start natural gas generators yet.
ASsuming there is still natural gasYou could try this. Then you'd only have to power pump/solenoid
That is 130 Ah at 120V, so technically correct, but misleading.