These are the panels with the built-in super sticky adhesive designed for metal roofs. Can be mounted almost anywhere, even lay them on the ground. 17 feet long and 15 inches wide. They put out around 30 volts and are fine for 12, 24 and 48 volt systems. For 48 volt, just connect 2 in series. These panels are virtually indestructible, and you can roll them up to fit in a car trunk. They have UL listing, so they are not junk. $290 BZD each. 664-3339 or 660-8482.