**3.1 Model of PV panels**

In the case of our 600 Wp application, the expression of the current Igene as a function of the voltage Vgene of the PV generator, formed by two panels of **Figure 2** in series, is written for a given illumination according to the expression:

$$I\_{PV} = 0.00932 \ast L\_{\epsilon} + 0.0055 - I\_{\text{s}} \left\{ \exp \left[ \frac{q(V\_{PV})}{160.A \cdot K \cdot T} \right] - 1 \right\} \tag{5}$$

As previously (Section 2.2) mentioned, experimentation with this generator when the intensity of the illumination varies from 300 to 900 W shows optimal voltages, currents, resistances, and powers, which vary from 50.8 to 51.0 V; 2.87 to 8.61 A; 17.7 to 25.8 Ω, and 145.8 to 437.4 W.
