Seeing that we will most likely be doing quite a bit of CG camping I didn’t want to be wasting all that propane keeping the water hot. Found the idea for an add-on electric water heating element from rv.net. It’s called the Hott Rod Water Heater Conversion System. You simply take out your drain plug and install a heating element into your existing hot water heater. It takes about 45-90 minutes for the water to reach full temperature with the Hott Rod alone so I’ll use both heaters to achieve full temp and then electric only to maintain it.
Hot water heater access was achieved by first removing the oven and then the top half of the insulating cover (Styrofoam). Rough up a spot and clean with alcohol then affix the thermostat to the side of the tank. Now, just run the wires between the incoming power, heater switch, thermostat, and heating element.
It did indeed take about an hour for the water to get hot on its own but no more wasting propane when most campsites have electricity already figured into the price.