@ShaulaEvans I got a portable 500Wh battery/inverter unit and a 100W panel, that is able to run a small (window) inverter heat pump, but would need a few more panels and double the battery at least to sustain heating or cooling. It is sufficient to run internet/wifi continuously while also charging tool or e-bike batteries, with good sun. But cloudy days will get only 15% of the panel rating and on good days 75%. High battery drain will be less efficient, so plan for like 80% of rated W.