Abstract: The present invention relates to the field of energetic, more particularly to generation of photovoltaic direct current followed by its transformation into alternating—AC—or direct—DC—currents. The invention is applicable to photovoltaic power plants and setups connected either to local AC electrical power distribution systems or to energy storage systems, which apply the known from the prior art devices. According to the claimed method selection electricity from photovoltaic module (1) by which the energy of solar radiation is converted to an electrical signal, pre-store energy electrical signal by using capacitor (2) not less than 0.15 Farad, charged to the maximum power voltage photovoltaic module that determined from the current-voltage characteristics, normalized voltage electrical signal using a DC/DC converter and accumulate.