**3.2 Operation of the cooker**

We experimented, during 1 day, the PV system of **Figure 3** in the case of the heating of 1 liter of water of a photovoltaic solar cooker. The principle of operation of this cooker is the supply of thermal resistance by optimal energy supplied by the PV panels, *via* a DC/DC converter, controlled by an MPPT command "perturb and observe" (**Figure 4**). We recorded the meteorological electrical quantities (intensity of illumination and ambient temperature), the electrical quantities (voltage, current, and power) at the input and output of the DC/DC converter, and the heating temperatures of the water and thermal resistance (**Figure 5**). The results obtained show:


**Figure 5.** *MPPT command flowchart Perturb and Observe.*


#### **Figure 6.**

*Experimentation of the cooker (hot plate) (Figure 3) during the heating of 1 liter of water. A: Illumination and external temperature. B: Duty cycle of the DC/DC converter. C: Input and output voltage of the DC/DC converter. D: Input and output current of the DC/DC converter. E: Power of Photovoltaic generator and heating resistor. F: Efficiency of the DC/DC converter. G: Temperature of the heating resistor and water.*

All the results obtained on the PV system, controlled by the MPPT command, show that the proposed MPPT command plays its role correctly, and the solar cooker is heated by the maximum power provided by the PV panels (**Figure 6**).
