I would, and did on our '98 Safari Trek, leave it in place and start fresh.
Our Trek has a 35(?) o;d panel on top with a small PWM controller that fed house and chassis batteries.
There are a lot of threads around here on what it takes to set up a portable or roof top solar system.
First thing to do is get a shunt based battery monitor installed so you can track usage and charging. This will give you info you need on how much solar you need/want by measuring the amount of power used. They run from about $45 to north of $200.
1998 Safari Trek 2480.
'15 Kawasaki Versys650LT, well farkled