Yep, I agree with all of the above. When I was researching it I never intended on running 24 hours a day. I was looking at running electric heaters in the bus which would need constant input from the alternator in order to run all night. After my research and discovering the costs, i.e. fuel and possible engine damabe, I opted for a propane heater
. We won't be using a ton of electricity so I am also looking into solar panels for recharging rather than a genny.