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Figure 6 Solar PV Inverter Settings – Input Limit Checks


The inverter parameters outlined below determine the acceptable DC input and AC output limits, as specified by the manufacturer. ElectricalOM verifies these parameters against the connected PV system and highlights any violations:


  1. Max. Isc_STC / MPPT (A) – Sets the inverter’s maximum allowable short-circuit current per MPPT, compared to the calculated PV string Isc @ STC.
  2. Max. Voltage (V) – Defines the maximum DC voltage input the inverter can withstand, checked against the PV array’s Voc at low temperatures.
  3. Min. Voltage (V) – Specifies the minimum DC voltage required for inverter operation, validated against the PV system’s lowest expected voltage.
  4. Peak PV Power (Wp) – Limits the total DC power the inverter can accept, compared to the installed PV array’s capacity.
  5. Max. AC Current @ V (A) – Indicates the inverter’s maximum AC output current at a given voltage. If specified, the design current (Ib) will be overwritten; otherwise, it will be automatically calculated based on the inverter’s AC kW rating specified in the circuit edit.


Info Icon (ℹ️) 

Max. AC Current @ V (A) (Point 5)

Figure 7 Info Icon in Inverter Settings – Max. AC Current at Specified Voltage