All I know is that its on an 30 amp circuit and the surge is over ~3000w, so the path of least resistance was just to get a generator port and interlock. That would also power the boiler which is hard wired to the panel.

The Anker was the first battery setup I saw at a reasonable price with a 30 amp output, and with that I hook into the whole house with the same port we use for the generator.

I also like that I can charge it back up with a regular 15 amp wall plug from the vehicles, with a little harbor freight inverter. Nice plan C should the generator shit the bed or we run out of fuel for it in an extended event and weather is incompatible with the solar panels.