Solar String Sizing Calculator

Calculate PV string configuration for inverter compatibility based on voltage and current limits.

Module open-circuit voltage at STC.
V
Module voltage at max power point.
V
Module current at max power point.
A
Temperature coefficient of Voc.
%/°C
Minimum expected ambient temperature.
°C
Maximum DC input voltage of inverter.
V
Minimum MPPT voltage of inverter.
V

Results

Voc at Min Temp-V
Max Modules per String-
Min Modules per String-
References: NEC 690.7; IEC 62548; SolarEdge/Enphase Design Guides