Hello,
I have 2021 Eagle with the solar on the side ports as well as a panel on the roof.
My question is this: is the solar on the side already wired to the controller already on board. If not how difficult would it be to wire it up?
I can only guess, but I'd say no.
Our 2020 pinnacle SAE solar on the side plug wasn't connected to anything, just loose wires behind the closeout panel.
Usually solar on the side panels use their own charge controller.