I bought this charge controller to use with a smaller panel I put on my camper this summer. It worked flawlessly, and is small enough to fit into the battery box with my marine battery. No complaints at all, and I like that even in dim light -- it still has an LED that shows you it is charging the battery with a solar panel. Easy to use, and very simply to set up. If you have crimp, solder, or twist electrical wires -- you can add one of these to your new solar rig. Have fun learning solar technology!