ercise 1 (9 Marks) lar panel constituted by photovoltaic cells is used for trans

Question

ercise 1 (9 Marks) lar panel constituted by photovoltaic cells is used for transforming energy from the sun. h cell has a power P 1,2 W and a nominal voltage Vc 0,48 V. Calculate the maximum current Ic supplied by each cell. The photovoltaic cells which constitute the solar panel are mounted in series to achieve a ominal voltage of Vp 12V. Calculate the number N of cells necessary for a solar panel. 3) The solar panel is rectangular having the following dimensions (427 mmx633 mm). The sun provides an average of 1000 W/m2 3.1) Calculate the surface area A of the solar panel in m2 3.2) Calculate the power absorbed by the solar panel Pa. 3.3) Calculate the efficiency of the solar panel nsp if it provides a power Po- 30.W 0T3 rt

Explanation / Answer

3.1 Determine the surface area of the panel by multiplying the length by the width. So, 0.427 * 0.633 = 0.270291 m2.

At STC the watts per meter squred (W/m²) is 1,000 W/m²   This is the standard used to determine how many watts of power are produced in a square meter on earth.

3.3 Divide the name plate rating by the square meters at 1000 W/m² to get the solar panel efficiency.

so , efficiency = 30 / 0.270291 * 1000 = 11.09%

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