Supplier suggestions for Adventurer 80RB Truck Camper

[NatureEnergy]

I've recently purchased Adventurer 80RB Truck Camper and am interested in installing solar panels (DIY). This would be my first time attempting to do this myself, and I was wondering if you guys have any advice in terms of the panel suppliers.

 

[NatureEnergy]

There is no shortage of generalized advice but I'm wondering where can obtain more specific instructions...