Specifications: 1) Max. power: 85W2) Max. power voltage: 18V3) Max. power current: 4.72A4) Open circuit voltage: 21.6V5) Short circuit current: 5.10A6) Number of cells: 3611) Weight per piece: 8.0kg12) Conversion efficiency: 16.25%13) Output tolerance:+/-3% 14) Dimensions: 1196 x 534 x 35mm producing area:China