1. TUV,IEC,CE,UL,cUL,MCS,ISO,Kiers 2. A grade silicon solar cell made 3. Warranty:25 years 80%, 10 ... solar panel •Each of our solar panel is backed by a 25 year limited power warranty (≥80%) and 10 year workmanship ... CHARACTERISTICSCell size (mm)156x156 polycrystalline solar cellsCell array60 pieces in a 6*10 matrixes connected in series.Dimensions (mm)1650 x ...