Supplied with factory fitted aluminum frame ideal for solar roof panels. Hail tested with a steel ball from 1m height Completely weather-proof, ideal for outside use Supplied with blocking diode to prevent reverse charging We recommend a solar charge controller for panels over 15 watts Temperature Range: -40°C~+80°C Tolerance Wattage: +/-3% Surface Maximum Load Capacity: 60m/s(200kg/sq.m) Cell Efficiency (%): >13% Standard Test Conditions:AM 1.5 100mW/cm2 25°C Certificates: CE, ISO9001-2000 Warranty: 2 years product warranty and 25 years for 80% of the power