My Honda EU2000i has been running for 8 days now. Total fuel consumption has been just over 16 gallons, about 2 gallons per day.
It is running my refrigerator, freezer, wood stove blower, a small fan to move warm air, 2 CFL lamps (13 watt), 1 LED lamp (7 watt), WiFi router, DSL modem, 5 laptop...