Energy efficiency of stand alone photovoltaic systems used in electrical drive for positioning ramps of anti hail missile

The paper gives one solution concerning the modality of power supply for anti-hail stations consumers. Because the anti-hail stations are situated in isolates areas, without electrical network access, the solution consist in the supply with electric energy from photovoltaic panels and accumulator batteries. There are also shown aspects regarding to energy efficiency of photovoltaic system, particularly to photovoltaic cells and photovoltaic modules. The simulation results of photovoltaic system used for anti hail stations were obtain with the HOMER program, version 2.1. This specialized software for renewable energy sources give the information about system´s work and the energy production.