... Solar panel efficiency is above 17% , warranty is the power 90% in 10 years , 80% in 25 years . a grade solar ... 125mmNumber of cells (Pcs)72 (6×12)Size of module 1580×808×35mmWeight15.5kgMaximum system ... TUV 2)Power range: 2WP to 310WP per panel 3)Monocrystalline and Polycrystalline4) Packing method: carton,wooden ... years 80% of peak power.Solar systerm solar panel 180W with CE,IEC,TUV certificate