... or poly:1W to 300W certificate: CE ROHS solar panel specificationsize: 180*140*18mmcell: poly 156*156mmNo. of ... AM1.5,1000W/m² 25°CMaterials of solar panel1. solar cell------monocrystalline solar cell 156*156mm2).front glass-------3.2mm, high ... easy installation, strong wind resistance, strong hail resisance.solar panel warranty: power is not less than 90% in 5 years. 2w polycrystalline solar panel