... 1. Control using common positive polarity way, accepts 2 lines input of solar array.2. LCD equipped (backlighting) to show ... are 24V,48V,96V,120V,240V and other normal series voltage level base on different battery voltage of off-grid PV ... selected and tested by our QC department. Functioning Test: Outlook, Input voltage, Output voltage, Frequency, Socket type, Protection functions(Low battery ...