We installed a 3 phase (400 V) energy system in the desert of Mauritania to power the air-conditioning of a warehouse. The system makes sure that the warehouse stays cool, even when the temperatures rise very high. The system works autonomous (off-grid) and starts when there is enough sun. Besides cooling the system generates enough energy for the lightening of the warehouse. The systems exits of solar panels, battery set and a 3 phase inverter.