I recently bought a small system to be used with my new Rooftop Tent.
My toy hauler trailer has all top shelf equipment.
http://rvbprecision.com/rv-projects/solar-install-grey-wolf-19rr-toy-hauler.html
But I didn't want to spend that much on the RTT system. A whole bunch of research and here is what I bought:
ECO Worthy 120W 12V foldable panels (Ebay $150) These will be used in portable deploy to take full advantage of the sun location
ECO Worthy 10w X 2 solar panels (Amazon $21 each) These will be permanently mounted on the camper cap on the truck to maintain the battery
PowMr 40A Charge Controller (Amazon $20) See my article on portable solar on my web page about this unit ...
www.rvbprecision.com
Weize 12V 100AH AGM Deep Cycle battery (Amazon $160)
AiLi Battery Monitor (Amazon $43) Great reviews and tells me absolutly everything I need to know about the system
8Ga Welding Cables, 25' Red/25'Black (Amazon $42)
Misc connectors, fuses etc ($20)
Total $477
I'm totally pleased with this system. The ECO Worth panels was a gamble, but they have been working great. A few friends have also bought the same panels and are very pleased with performance.
Hope this helps!