The satisfaction of the energy needs of a computer laboratory requieres a systematic study of the consumption of the various electrical receivers listed. A compromise must be found between the time of use of these receivers and the number of needed to be connected to the photovoltaic power source in order to minimize, as much as possible, the daily energy consumed by the installation. We note the peak power (P_c), the number of the panels (N_(pa,t)), the power of the inverter (P_Ond) and the current of the regulator (I_rég) are lineary a function of the daily energy (E_cj). The total number of batteries (N_(b,t)) is a linear function of the daily energy (E_cj) and the autonomy of the battery bank (N_Au).
In this paper, we propose a simplified and reliable method for sizing, selecting and wiring of the photovoltaic components in order to ensure an effective and secure supply of electrical energy.