Originally Posted by Michael Oehl
I am the 2d owner of 2016 Interstate. Existing AGM house batteries currently has a 2 pole Sae connector wired to the batteries (see red arrows; assume to accept a battery tender). I park my RV under cover so solar panel is ineffective for keeping batteries charged and keeping up with parasitic drain. I would like to use a portable solar panel (Renogy 100W with 20amp controller) to keep the batteries charged. I can place it outside of the covered parking spot I am in to access sun. Any input on this idea would be welcome.
The parasitic drain on the Interstate is about 0.5A at 12VDC. Your plan to use a 100W solar panel with controller should work just fine to keep you batteries charged when parking your Interstate and not running the coach systems. Just connect the output from the solar controller to the connector in photo you posted.