Double check all the load items. Don't forget if you have all your breakers on, a/c and water heater may not be able to run on just 30 amps. That is considering all the other items running. You say 50 amps. your cord and adapters will decrease the available amps as well. My 3000runs one 15000 btu a/c, converter/charger and most little things like TV, radio and such. so again, double check all the load. When we are dry camping, we run water heater on propane all the time. I also ordered a 30 amp male / 50 amp female cord for my unit as it eliminates a bunch of adapters. Good Luck & Be Safe ! ! !