'Invented at Napier University in Edinburgh, Solartwin won a DTI “Smart Award” for innovative technology. Solartwin’s unique freeze-tolerant solar water heating panel is fed by an quot;quot;intelligentquot;quot; solar electric pump. Hidden inside the patented heat absorber are our unique flexible water channels. Double glazing, in front, lets the sun’s heat and light in. “Twin-optimised” heat absorber coatings make it very hot. Daylight drives the solar electric pump. This moves cold water, through a narrow pipe, from the bottom of your existing hot water cylinder into the panel. Here, the water heats up. Your solar hot water then delivers itself, direct, to the top of the cylinder. That’s it.'