a single 325W on a 100AH LFP will do 600Wh a day easy..
I'm doing twice that on average when I go out, 90 something quart Engel, Propex Furnace, Radio w/100W Sub, Power Vent, Breeze Fan, dusk/dawn internal/external lighting, fuel gauge, 3 mobile transceivers, 6 handheld radio charger, pod...