Add battery voltmeter to control panel
In my Jayco Pinnacle, the factory put in the really worthless battery check that tells me Full, 2/3, 1/3, or Empty. So I ordered a voltage meter with a led read out of the voltage. I installed the display and replaced the switch blank and with a switch which is wired to the battery and meter. When the switch is off the voltage meter does not display anything and when switched on, tells me the battery voltage. A side benefit is since I have solar panels on the RV I can see when the solar controller starts kicking in at times feeding power to the batteries. Itís not fancy, but works great and cost less than $20.