Profile: Rayotec UnderFloor Heating, Ltd. is a supplier of electric underfloor heating mats. Our photovoltaic(PV) solar power cells are used to power everything from calculators, watches and battery chargers to road signs & security alarms & it is made of semi-conducting materials similar to those used in computer chips. Our solar thermal systems are generally composed of panels that convert sunlight to heat and this systems may be used to heat domestic hot waters.