The watts/surface area for a froat plug heater is VERY high. I'm looking for a transformer to run my latest gen project, block heater at half voltage and also rig up a thermostat.
Very interesting concept. Never thought about it but no reason it shouldn't work (if the energy savings are there). If you have a hot water boiler system just plumb the Gen Set in to that and it is always warm and ready to go. When the generator is running, it will supplement the boiler.