Pv Curve Of Solar Panel

How to design and install a solar pv system.

Pv curve of solar panel.

Typical i v characteristic curve for a pv cell figure 1 shows a typical i v curve for which the short circuit output current isc is 2 a. However it is scaled based on the number of cells connected in series and in parallel. The sunlight is a group of photons having a finite amount of energy. The voltage and current at this maximum power point are designated as vmp and imp.

The absorption depends on the energy of the photon and the band gap energy of the solar semiconductor material and it is expressed in electron volt ev. Photovoltaic cells have a complex relationship iv curve between their operating environment and the maximum power they can produce. When n is the number of cells connected in series and m is the number of cells connected in parallel and i sc and v oc are values for individual cells the below i v curve is produced. Every model of solar panel has unique performance characteristics which can be graphically represented in a chart.

There is a point on the knee of the i v curve where the maximum power output is located and this point is called the maximum power point mpp. The fill factor abbreviated ff is a parameter which characterizes the non linear electrical behavior of the solar cell. For a module or array of pv cells the shape of the i v curve does not change. For the generation of electricity by the cell it must absorb the energy of the photon.

Working of a solar cell. The current voltage i v curve for a pv cell shows that the current is essentially constant over a range of output voltages for a specified amount of incident light energy.