solar panel 20w

Maximum power (Wp)20W Maximum power voltage (V) 17.3V Maximum power current (A) 2.9A Open circuit voltage(V) 21.6V Open circuit current (A) 3.18A Number of cells (Pcs) 36 Temperature Range -40 to +85 C Tolerance Wallage +-5% Surface Max. Load Capacity 60m/s (200kg/sq.m) Junction Box Type 18 Cell Efficiency 17.96% Module Efficiency over 12.69% Output tolerance +-5% Frame  Aluminum Standard Test Conditions  AM1.5 100mw/cm2  25C FF 75% Size of Module 490x390x30mm