Maximum power (Wp): 70W 75W Maximum power voltage (V): 16.8 17.4 Maximum power current (A) 4.16 4.31 Open circuit voltage (V): 21 21.7 Short circuit current (A): 4.7 4.88 Size of module (mm): 1210*540*28 1210*540*28 Weight per piece (kg): 8.2 8.2 Length of Cables (mm): 900 900 Frame (Material, Corners, etc.): Anodized Aluminum Alloy Anodized Aluminum Alloy