550W 555W Opt. Operating Voltage (Vmp) 41.3V 41.5V 41.7V 41.9V Opt. Operating Current (Imp) 13.08A 13.14A 13.20A 13.25A Open Circuit Voltage (Voc) 49.2V 49.4V 49.6V 49.8V Short Circuit Current (Isc) 13.90A 13.95A 14.00A ...