ROCKSOLAR 0.4HP 20-40V Solar DC Brushless Water Transfer Pump High-Efficiency BLDC Motor: Designed for optimized water pumping with minimal energy loss. MPPT Controller: Features advanced maximum power point tracking for consistent performance. Voltage Compatibility: Operates on 20-40V DC, with maximum efficiency between 30-40V. Dry Run Protection: Automatically stops operation when no water is detected to prevent damage. Overload and Overvoltage Protection: Ensures system safety and longevity. Max Head: Capable of pumping water up to a depth of 98ft. Rugged Design: IP54-rated pump suitable for various environmental conditions. Suction Check Valve: Includes a valve to prevent backflow and maintain system pressure.