Hi, I am wanting to add a simple setup to just keep the trailer batteries charged so I can run the furnace at night this winter. So my power needs aren't much. I'm wondering if you guys have an opinion on just buying the 7 pin adapter and plugging the solar panel into the 7 pin plug. That way it's charging like the pull car is running. My pop up is not wired for solar so I figured it is wired to charge the batteries from 120ac or 12 volts from the car hookup so that would be the easiest charging solution. What are your guy's thoughts. Would there be some obvious downsides to charging that way. Is plugging in a jackery to the ac adapter a good way to charge the trailer batteries? Thanks.