SPECIFICATIONS60 Watt130 WattHigh performance: light transmittance Up to 93%Cell Efficiency: 22.3% (one of the highest)Module Efficiency: 19.5% (one of the highest)Maximum Power: 60 Watt130 WattTolerance Wattage: +/- 5%Maximum System Voltage: 600V DC (UL)Optimum Operating Voltage (Vmp):17.5V22VOptimum Operating Current (Imp): 3.4 A5.91AOpen-Circuit Voltage (Voc):21V26.4Short-Circuit Current (Isc): 3.8A6.35Power Tolerance: 0=+5W5W +/-Temperature Coefficients ⁰C: Power: ­­0.38% / °CCurrent: 2.2mA  / °CVoltage): ­60.8V / °CTemperature Range-40⁰F to 185⁰FDimensions: inches28 1/2x21x0.1251 7/8x21 3/8x0.12Weight: 1.98 lb4.96 lbCertifications: CE, ETL, TUV and RoHS