The AC parameters of a solar cell can be measured either by a frequency domain technique or a time
domain (transition) technique [4]. In the frequency domain technique, a small signal is applied around the
operating point and the AC parameters are measured [5]. These are steady state values. In the time domain
technique, the cell voltage varies from short circuit to open circuit or vice versa. Hence, the measured
values of solar cell AC parameters are integral values from short circuit to open circuit or vice versa
depending on the test conditions [6]. Time domain or single frequency techniques have certain limitations
and disadvantages for making measurements on solar cells. Measured the AC parameters of a Si solar cell
in terms of complex impedance. However the study was limited to approximating an estimate only of cell
capacitance. Hence, an experimental setup has been developed to measure the AC parameters of solar cells
using an impedance spectroscopy technique [7].