It has been shown that dynamic characterization of PV modules can also yield
information on the comparative quality of modules [8], whereby the traditional
method is the static IV characterization. Moreover, the future trend of PV
applications is in grid-connection, impedance of PV arrays under such conditions are
voltage- and frequency-dependent. Interactions between light intensity fluctuations,
PV arrays, power conditioning units and load variations are complex. Understanding
such interactions will become more important. The essential electrical
parameters of modules required to predict such interactions can only be obtained by
dynamic characterization, not a static characterization, of PV modules or arrays.