The SunRotor SR-4 solar pump is a helical rotor pump that can produce 4 gallons per minute and has a total dynamic head limit of 150 feet. It is primarily used for agricultural/livestock watering, drip irrigation and remote dwellings where there is no other source of power. With a SunRotor Powerpack, AC/generators can be used, or batteries if 24-hour production are needed. A five-year warranty (two-year full, three-year pro-rated) is available on all SunRotor products. Solar Power & Pump Co. is the parent distributor company for SunRotor brand solar pump products. Solar Power & Pump is a specialty distributor focused on providing solar powered water pumping systems. The company has nearly 20 years of solar pump system design experience from its most senior designers.