The modules use high-quality mono-crystalline solar cells, enclosed by high-rigidity tempered glass with excellent light transmittance and output performance. Surface treated with reflection reducing process, increasing the light absorption and back sealed with anti-aging EVA, resistant to moisture and corrosion. The efficiency of our monocrystalline solar cell is over 95%. Each panel is strictly tested before leaving the factory. Our solar panels are designed for a lifetime of 25 years and guarantee that the power will not decline less than 5% within 10 years and 10% within 20 years.