ok, it is a 1977 old motor home, the kind that looks like a van in the front but has a over cab bed area. so it is about 15' long and about 7' wide. It sits in the Arizona sun all day long and right now it is close to 110 degrees. so how much per month does this raise my electric bill?it is not very insulated and is being lived in so it is running alot.
I doubt a AC that size will keep the home cool in that climate, so it will run continuously. Look up the current or wattage of the unit. It will be about 600 watts or 5 amps. The next thing you need is the cost of electricity in your area. Guessing at 10? per kW-hr.. 600 watts x 24 hours/day x 30days/month = 432000 watt hours or 432 kW-hrs/month 432 kW-hrs/month x $0.10 per kw-hr = $43 per month. .
