According to Go Power, this is their most efficient solar charging kit for RVs with limited roof space. The kit comes with 100 W monocrystalline solar panel, 30 A PWM charge controller, two 25 ft cables with MC4 connectors and the necessary mounting hardware with Z-brackets.
Go Power Retreat 100W Solar Kit w/ 30A PWM Charge Controller for RVs, Boats
1 x GP-PV-100M Solar Panel
1 x Go Power GP-PWM-30 30 A PWM Charge Controller
2 x 25' 10AWG MC4 output cables (red & black)