1) A grade cell used 2) Certifications:CE, Rosh, ISO 9001:2008 3) 3 years product warranty and 25 years 80% of power Product description: High transmission rate and Iow iron tempered glass , anti-aging EVA and high flame resistant TPT to Iaminate , and anodized aluminum alloy . Products have high efficiency , Iong life , easy installation , high wind and hail impact resistance etc . ModelWp(W)Voc ...