For with Geyserwise Max and 12V Solar Pump Description For use with Geyserwise Max in 12V pumped solar systems   Technical Specifications   Model: SD Eco plus 10W Peak Power (PMax) : 10 WP PMax Tolerance:  +/- 2.5wp with tolerance 1% Voltage: 18V Current: 0.56 A Open Circuit Voltage: 21.1V...