I ordered my panel and controller through Windy Nation. Its their PWM 30amp model. This controller will handle any amount of panels I ever add. I went the PWM route to keep the costs lower as this is my first jump into solar. Down the road as I change rigs I may adjust the type of solar I use as I figure out my needs.
2008 2500hd Silverado Duramax
2011 Northern Lite 8.5 lite
2006 Wildcat 27bhwb fifth wheel
2009 Lance 830 (sold)