1)Optimum Operating Voltage: 17.6V
2)Optimum Operating Current: 1.13A
3)Open Circuit Voltage: 21.8V
4)Short Circuit Current: 1.27A
5)Maximum Power: 20W
6)Maximum System Voltage: 715V
7)Operating Temperature: -40-+85
8)Dimension: 548*350*25mm
9)Number of cells and connects: 4*9PCS
10)Weight: 2.5kg