Agreed. When we are on 30 amp, we really need to pay attention to what we are doing to try and avoid tripping the breaker. We have a pretty good system, but it still happens from time to time. That said, I run the water heater on electric almost all the time. Switch off when other power demands are high. Run both at the same time to get cold water hot faster when we first arrive, but that could all be in my head too!