20 Watt Solar Panel Specs:

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Electrical Data	Peak Power Voltage Vmpp 18.0V		Physical Characteristics	Cable Type
Typical Data At STC	Peak Power Current Impp 1.56A		H Inches (mm) 16.2 (412)	feet (cm) 15.00 (457.2)
Rated Power Pr 20W	Open Circuit Voltage Voc 21.0V		W  Inches (mm) 26.2 (666)	18/2
Peak Power Pmpp 20W	Short Circuit Current Isc 1.67A		T Inches (mm) 0.63 (16)	5 Year Warranty

The performance of the solar cells is measured at Standard Test Conditions

(STC): 1000 W/m irradiance, AM 1.5 spectrum and 25° C cell temperature.