GrecaLux system is a modular and multiwall polycarbonate panel system with UV protection. Through its high thermal insulation, GrecaLux is an ideal solution for transparent roof and walls. GrecaLux system's form as isosceles trapezoids provides the properties of high load resistance and thermal insulation, which makes GrecaLux polycarbonate panels capable of fulfilling requirements of any project. Through the wing and general structure, GrecaLux polycarbonate panels can be assembled with nearly all types of insulation panels. In addition, GrecaLux polycarbonate panels can be mounted on each other in the horizontal direction through the same structure, and wide lighting areas on sloped roofs and walls can be covered very easily and safely.