4700 across 2 floors and 2 1.5 ton units doing rather well. Need another 1 ton for the far end of a room to keep it cool not just ok (heat gain from windows). Cost me 3k to self install so far allready had a 200a panel and a decently big solar install. Running costs for heat have been sub 300 a month.

I do have oil baseboard for the OMG cold days used maybe 100g all winter.