My first run of the 803 also came way before i had planned, it was wired in just a few days prior and we were in the middle of a kiddos b day party (excuse to drink with friends) with a house full of people, I spiked 110% a few times with a kitchen full of crock pots, toaster oven, microwave, hot water heater, well pump, dishwasher, etc. It was also my first startup intoxicated too so cannot complain! I have 400A service to the house and purposely put "generator" stuff on only one panel, when the grid power kicks on my oven beeps and lets us all know.