I have 6 x 100 watt Renogy panels and a 40 watt Tracer MPPT controller. They are arranged 3 in series then hooked up in parallel. It keeps the volts up and the amps down as 12 vdc does not like to travel far without losses. Can't believe how much power they provide. I added two more 125 AH batts and haven't wanted for electricity since. They keep the batts at or above 12.8. When I turn something on, it uses the incoming power first, then from the batts if the draw is above what the panels are producing. First thing in the morning at sunrise, they start into boost charge to bring the batts back up. Why I didn't do this years ago, I don't know.
All the panels are mounted with wellnuts and Goop. They are only 3/4 inch above roof, so no wind can get under them. Seagull poop and leaves are my only problems.
2013 Silverado 2500 HD Duramax/Allison Tuned
Aviator Wright Flyer #1919
"First In, Last Out". 11B4Y
DAV, MOPH, VFW, 5/7 Cav,1/8 Cav Assoc.
11th ABN Pathfinder Co. N7MIP