Can't say much for those small trickle solar panels.
We have a 30 watt on our 03 Itasca Suncruiser and it's worthless.
However, I have a plan for you.
Internet: Solar Panels, can't remember the name of the company in Oregon, but it will appear on this web and there will be a phone number to call.
From what I wanted to do, I believe I'll need at least 100 watts.
Anyway, hope this helps.
Right now my problem is getting RV to Oregon.