Comparative Study of Two Different Make of PV I-V Tracers
This study consists of comparison of two makes of photovoltaic I-V (Current-Voltage) tracers. I-V tracing is
basically done to test the instantaneous performance of PV (Photovoltaic) modules directly at solar power plant site. This
data obtained using I-V tracers is then compared with digital multimeter, flash test or specification sheet data provided by
the PV module manufacturer. This comparison allows users to decide whether the module’s output parameters at Standard
Test Conditions (STC) lies within the limit with those reported by the manufacturer. I-V tracing method for module testing is
very popular amongst the PV plant owners for testing the degradation of PV modules at regular intervals. It also plays an
important role in Warranty claiming of underperforming PV modules within the warranty period given by the module
manufacturer as most of the PV module manufacturers do accept the results obtained by I-V tracing. The two types of I-V
tracers compared here are Solmetric PVA-1000S PV Analyzer and PVPM1040C. The main aim behind the comparison of
these two I-V tracers is to find out which of them has the measured value of PV module parameters closer to the one
mentioned on the specification sheet of the PV module.
Index Terms— Photovoltaic Modules, Solar Power Plant, I-V Tracers, Accuracy.