I used the following system in my camper.
It will power cell phones, 12 volt lights, MP3, AM/FM/CD radio, laptop and a 1000 watt inverter.
I used the Harbor Freight solar panels and they worked well.
I bought two sets and they charged four six volt
golf cart batteries wired series/paralell.
The controller is a 30 MPPT amp contoller.
The panels were wired into a waterproof combiner box and then into the charge panel/breaker panel.
I've since bought a 100 watt panel for the trailer, not because the HB panels did'nt do the job; just one panel is easier to handle than six. : )
Hope this helps.