These systems have been developed by our R&D department as a complement to and an improvement upon our water pumping system using a centrifugal pump. We have designed (and we manufacture in our factory) a specific motor for positive displacement pumps and a control system that allows it to work at the maximum power point of the PV array at any available power. In the photo, the assembled motors (back and right), pieces of the motors and of the pump (center) and part of the electronic control (in front) can be seen. The electronic control is mounted inside a watertight box and incorporates the level sensor of the storage well/tank as an option. We have a module that, connected to the electronic control, displays the available power, the energy consumed, the pumped water volume and the global efficiency at any moment. The system can also be remote controlled (via RS232).

        - Efficiency greater than any other conventional system
        - Use of a submersible DC brushless motor (maintenance free)
        - Only three cables from the electronic control to the motor
        - Maximum power point operation (impedance adaptation solar/hydraulic)
        - Operates from a few Watts to various kiloWatts
        - It can pump up to 120 meters of water column
        - Made of stainless steel
        - Easily dissasembled
        - It can operate with water with particles in suspension (sand particles)
        - No need for batteries (no maintenance or charge/discharge losses)
        - The pumped flow is directly proportional to the available power (there is not a threshold power as in centrifugal pump systems). The system starts pumping water very soon after sunrise until very late in the evening.