pvperfsolar performance modeling

Reference

API field

Open-circuit voltage

Voltage at zero current, standard conditions

Unit V

What it is

The voltage across the module with no current flowing, at standard test conditions, in volts. The circuit model is fitted through the short-circuit current and the open-circuit voltage at standard conditions and a third point set by the One-diode STC point step: the datasheet maximum-power point, or a maximum equal to the nameplate. The cold-weather string voltage the inverter must withstand is computed from it.

Typical values and how to get it

The module datasheet value. A PAN file carries it too. If not given: the module runs on the PVWatts DC model, which does not read it. The one-diode models need it: a request that names one of them without it is refused.

References

  1. IEC 60904-3:2019, Measurement principles for terrestrial photovoltaic devices with reference spectral irradiance data (standard test conditions)

API

module.v_oc_ref_v