A 48V dc circuit over a 12 AWG wire would provide less than 1/2 the wattage (power) available in a typical 120V AC circuit. You’re still going to need some circ

A 48V dc circuit over a 12 AWG wire would provide less than 1/2 the wattage (power) available in a typical 120V AC circuit. You’re still going to need some circuits that can deliver 1500W to power appliances, space heaters, window AC, etc.