... than 40°CPH6.5-8.5SituationBe immersed in waterApplicationPumping water from deep well, gardening, fountain and etcPRODUCT FEATUREcompact structure, ... maintenance-free, safe, reliable, energy-saving, efficient;Photovoltaic water pump, Permanent magnet brushless motor, Maximum power point tracking(MPPT) ... 4 inch 36V screw solar powered solar submersible deep well water pump system (4SPS3/60-D36/500)