These parameters are the main electrical module characteristics, available on any manufacturer data sheets. They are usually given for STC, but the program accepts measurements performed under other conditions to establish the model from on-site measurements in outdoor conditions.
These parameters therefore include:
| Gref and Tref: | the reference irradiation and module temperature conditions during reference measurements (usually STC). |
| Isc and Voc: | module short circuit current and open circuit voltage at these given conditions. |
| Impp and Vmpp: | any operating point in the region of the maximum power point at these given conditions. |
| muIsc : | temperature coefficient for Isc. This has only weak influence on the module behaviour. When not known, it can be taken as about 0.05%/°C. |
