SAJ PDS51 – Solar Pump Controller
Saj Electric
The SAJ PDS51-4T011-E is an 11 kW three-phase solar pump controller designed for efficient and reliable water pumping using solar photovoltaic power. It combines advanced MPPT technology, variable-frequency control, and integrated pump protection to optimize solar energy utilization and provide stable pump operation for agricultural irrigation, wells, water supply, and other solar pumping applications.
The SAJ PDS51-4T011-E is a high-efficiency solar pump controller designed to drive 11 kW three-phase, 380 V water pumps directly from a photovoltaic array.
Its integrated MPPT technology continuously tracks the available maximum power from the solar array, allowing the system to extract more usable energy from changing solar irradiation conditions. The controller uses variable-frequency control to automatically regulate pump speed according to the available solar power.
The PDS51-4T011-E supports a DC PV input up to 800 V, with a recommended MPPT operating range of 400–750 V DC and a best working voltage of approximately 560 V DC. It also supports three-phase AC input, allowing the system to use an auxiliary grid or generator source where required.
The controller supports both asynchronous and permanent-magnet synchronous motors (PMSM) and provides V/F and Sensorless Vector Control (SVC) modes. Built-in protection functions include overvoltage, undervoltage, overload, short circuit, overheating, surge, and lack-of-water protection.
With an IP65 enclosure, natural-air cooling, external LED keypad, and communication capability through a 4G/2G GPRS DTU, the PDS51-4T011-E is suitable for demanding outdoor solar pumping installations.