I purchased the SP15WCESI this summer and it is awesome. The main use was for keeping the battery on my 12 boat lift motor charged during the summer. But since I added the controller it can charge three batteries so I also use it to charge my trolling motor battery on my fishing boat. I used the pole mount for the mounting on my lift, it is not only sturdy but the aluminum look on both the panel and mount blend into the look of my lift and canopy. Good combo and I am considering getting the flat mount now for use on ice shack in winter. Great products, thanks