GEF Solar is a professional supplier of solar module, solar power system and other solar produts in China Our annual supply ability of solar panel is about 30MW. Our standard solar modules are in the power output range of 22W to 280W, and in either Mono-Crystalline or Poly-Crystalline. We also offer customized modules based on customer specifications and provide OEM service to our customers worldwidely. We choose high-efficiency solar cells and reinforced solar glass to assure module quality by raw materials. We also do specially treatment on aluminum frame substantially increases module endurance against high winds and snow load. Our modules meet the highest industry standards possible in accordance to CE, IEC and UL1703 certifications. For our solar panels, not only duration of defects warranty is 2 years from the date of delivery from our factory, but also power warranty is 25years.