This is one of the systems that Green Energy Colorado installs. These vacuum tubes are one of the most efficient solar products on the market. This system can mounted vertically (as shown) or horizontally. Unlike the panels you might be used to seeing, these tubes DO NOT rely on the outside tempature to function. The tubes are made of impact resistant solar glass that can withstand up to 320lbs. of pressure per square inch and come with a 10yr warranty. This system is unique in that if a tube(s) get damaged you replace that tube instead of having to replace a whole panel, making this set up very cost effective in the long run.