Once the hot water heater is full and if you are connected to a water source it will fill as you use it. If you are using from the fresh water tank, the water pump will need to be on.
Our Axis has two switches for the hot water, when on propane there is a light; when on electric there is no light. Both switches are rockers and you push at the top of the rocker to turn on and the bottom to turn off.
When on 120 volt ac there is a breaker in the distribution panel that needs to be on also.
Sometimes the hot water heater also has a switch on the heater itself. It may or not be easy to locate. On our Outback it is behind an interior panel that needs to be removed. On our TM that we had it was behind the outside heater door.
Axis 24.1 class A 500watts solar TS-45CC Trimetric
Very noisy generator :M
2016 Wrangler JK dinghy
“They who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety.” Benjamin Franklin