Originally Posted by 02interstate
We took a trip to Tucson this weekend and after arriving (440 miles) and turning of our '12 interstate we noticed an odd noise coming from the right rear of the van. It was a soft "ruurrr, ruurr" type noise. I know that is an awful description. - sorry.
Any ideas what this could be? Batteries? Solar panel charging batteries?
Solar panel is silent, and the solar charge controller is not located where the sound was coming from anyway.
What you might have been hearing is the cooling fan for the inverter/charger.
It's also possible, if you were running the water heater on propane, that you might have been hearing the gas jets in the heater.
Those are the only things near the right rear that I can think of that might be making some kind of noise.