PV module measurements
PV modules properties depend on cell type and ambient conditions. To compare modules of different types or from different producers the modules have to be tested under standardized conditions. Usually Standard test conditions (STC) and Nominal operating conditions (NOC) are used.
The electrical properties of PV modules are measured in a laboratory environment or under real test conditions, usually at one of the PV test sites LPVO-A and LPVO-B, which are located on the roof of the faculty building.
Standard test conditions
Nominal operating conditions
The measurements in our laboratory follow IEC 61215 standards.
IEC 61215/61646 test currently covered in our laboratory:
10.1 Visual inspection
10.2 Maximum power determination
10.3 Insulation test
10.4 Measurement of temperature coefficients
10.5 Measurement of nominal operating cell temperature (NOCT)
10.6 Performance at STC and NOCT
10.7 Performance at low irradiance
10.8 Outdoor exposure test
10.10 UV preconditioning test
10.11 Thermal cycling test
10.12 Humidity-freeze test
10.13 Damp-heat test
10.15 Wet leakage current test
10.18 Bypass diode thermal test
Furthermore we offer measurements of conversion efficiency distribution with novel method of electroluminescence. This procedure reveals the majority of hidden defects present in the PV modules, which can have effect on long term stability and energy yield of a PV system.