Fiqure 2 shows an equivalent circui

Fiqure 2 shows an equivalent circuit that may be used to model the behavior of a solar cell . Notice that the current generated by the photons is represented by an independent source . The two resistors shown in Fiqure 2 model two of the losses in a solar cell . R s is a series loss due primarily to the ohmic loss in the surface of the solar cell . The shunt resistance R s is use to model leakage currents . A shunt resistance of a few hundred ohms does not reduce the output power of the solar cell appreciably . [in reality , R s ] is much larger than a few hundred ohms and can in most cases be neglected . The series resistance , however , can drastically reduce output power . For example , a series resistance of only 5 Ω can reduce output power by 30%