as all that is illegal here unless it’s performed by a qualified electrician. Anyway, what I do is run a 2kW inverter off the car alternator, uses about 2 gallons US per day of Diesel on tickover, plugged into the house socket circuit and a link from the socket circuit into the lighting circuit so we have everything except cooking (BBQ) or hot water (cold shower never hurt anyone). Will also run on waste veggie oil, but then it smells like a BBQ.
Daughter was quoted $8,000 to have two air conditioners installed. Not including the cost of the units. Just pure, govt. permitted extortion. Borrowed a mate’s tools, $250 for some pipe and a day’s work for me. $40,000 per week!! Shoulda been a sparkie.