pvperfsolar performance modeling

Reference / Nameplate schedule

Model option

Apparent power

The schedule's value times the power factor caps the active output

Inputs used: Ambient derate schedule, Nameplate is apparent, Power factor, Ambient nameplate schedule

Method

The schedule is apparent power, like the nameplate. Its value at the ambient temperature, capped at the nameplate, times the power factor is the inverter's active AC limit (1). The operating-point rules of the Inverter operating limits step hold the output to it.

The math

  1. AC limit
Pac,max(Tamb)=PF min⁡(Psch(Tamb), Pnom,inv)(1)P_{ac,max}(T_{amb}) = \text{PF}\,\min\big(P_{sch}(T_{amb}),\ P_{nom,inv}\big) \tag{1}

where

Symbol Meaning Unit
Pac,max(Tamb)P_{ac,max}(T_{amb}) the inverter's own AC limit at the ambient temperature W
Psch(Tamb)P_{sch}(T_{amb}) the inverter's ambient nameplate schedule read at the ambient temperature, linear between its points, no bound without a schedule VA
TambT_{amb} the ambient temperature °C
PF\text{PF} the power factor. When the inverter nameplate is apparent power (Losses tab), else 1 —
Pnom,invP_{nom,inv} the inverter's AC nameplate VA

API

options.inverter_schedule_power = apparent

Symbols follow the symbol registry.