Well Geoff. I have kind of taken your suggestion.
Since there was already an electric water heater in the trailer, I have decided to put in two systems (it was actually easier to do this than to switch to gas).
When I am at a place that provides hookups, the system will use the electric water heater since I presumably will have electric. And it will also work when the generator is on.
If the generator does crap out or I dont' feel like running it (maybe boondocking in a quiet place), I can use the gas water heater. I have plenty of room so that is not an issue. And I have put one-way valves in so one system will not backfeed the other.
Mike
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