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PV modules - Measured Data

This page contains additional optional data specified for this module, and tools for the elaboration of the model.

Low-light data

Some unknown parameters of the model, especially the Series Resistance, have a great impact on the Low-light behavior of the model. Therefore the low-light efficiency measurements are a powerful mean for a good determination of these parameters.

With this tool, you can enter:

  • either relative efficiencies with respect to the STC efficiency. Acceptable values usually don't exceed +0.5% to +1% for 800 W/m² and 600 W/m², and may be of the order of -3% or less at 200 W/m² (crystalline modules)..
  • or directly the measured Imp, Vmp, Isc, Voc values at different irradiances, from which the relative efficiencies will be calculated.

After these definitions for at least 4 irradiance levels (800, 600, 400, 200 W/m²), you can ask for optimizing the Rserie of the model.

Measured I/V curve

This tool allows to import a Measured I/V curve (for example from msEXCEL), and then adjusts the Rshunt and Rserie for matching this curve.