PTT Global Chemical Public Company Limited has installed a solar power generation system on the roof to bring the electricity generated from solar energy to be used during the day to reduce the use of power from transmission lines. Installation capacity of 126.00 kWp by installing SolarWorld brand solar panels, SMA brand inverter by design for this project. Since the installation area is a concrete roof building, ReZeca designed the installation without drilling the building floor to hold the panels structure By using the technology of the mounting device from Germany brand K2 Systems, which eliminates the problem of leaks and cracks from the penetration Which since installed it has no problem at all.