MechanicalCharacteristics Dimensions:523mm(L)x523mm(W)x25mm(H) Weight: 3.6kg SolarCells:Polycrystallinesolarcells,36cellsina3x12matrixconnectedinseries Construction:Front:High-transmission3.2mmtemperedglass;Encapsulate:EVA;Back:TPT Frame:ClearanodizedaluminumalloyColor:silver