If I attempt to power an A.O.Smith water heater (gas fired, but a little control panel to control the thermostat and power vent) with the Honda generator, the water heater faults and will not operate. The resulting LED code on the water heater control pad indicates a wiring problem with the Neutral and Ground. Will sure - a simple circuit tester shows an "open ground". This is because of the Neutral and Ground being independent from the generator and not tied together.
What's a solution to fix this? I'd like to run the water heater from the generator during times of power outages. Note that I'm not hooking this generator up to the building's main power panel - just plain ol' extension cords from the generator into the house.