Unisolar Panels
I bought a Unisolar 32W flexible panel on eBay about 4 years ago to supplement the limited charging capacity of my outboard's alternator (5 amps) on my Cat27. The panel works well, as far as it goes. An ammeter shows it put out out about 2 amps in good, direct sunlight, a little less than the 32W (2.66 amps at 12V) advertised would indicate. The panel mounted easily to the top of my dodger with some brackets I bought. I also bought an "extension cord" arrangement (10ft I believe) and cigar lighter plug, so the panel and is easily movable around the boat to get the best view of the sun, and easily connected to the system thru the cigar lighter. When not needed, it rolls up on itself, and the extension cord wraps around it to store in the V-berth. Kind of expensive (about $350) for the entire arrangement on eBay. And with such limited charging capacity of my OB, and limited space to mount other panels on my C27, the flexible arrangement works best for me. If I had the room, I'd buy a hard panel. They're less expensive and more powerful. But if I had the room, then I'd likely have an inboard with a big alternator, and wouldn't need the supplemental charging at all.Good luck!