These systems have been developed by our R&D department to satisfy pumping necessities in non attended installations or in those where a diesel generator is not cost effective. The system starts-up and stops automatically, it does not pollute and its operational life is very long. It needs no maintenance and the pay-back period is very short. Its components (with the exception of the electronic control that we manufacture) are standard and can be bought in almost any place around the world: the PV modules are standard, the motors are 220V three phase or 380 V and 50/60 Hz, and the pumps are also standard.