PV Stringing Calculator

Choose an inverter + panel. This tool returns the safe max panels in series, safe strings per MPPT, and a suggested wiring configuration.

Inverter Panel

Min Ambient Temp (°C) (optional)

Voc Temp Coeff Magnitude (%/°C) (optional)

Cold Voc Margin % (used if no temp coeff)

Hot Vmp Derate % (MPPT-min check)

Tip: If you enter min temp + Voc coefficient, the cold-voltage check becomes much more accurate.

Select an inverter and panel, then click Calculate.

Max series limited by inverter MPPT max (using Vmp) and max PV voltage (using Voc + cold boost).
Min series sanity check for MPPT min (hot Vmp derate).
Max parallel strings per MPPT limited by MPPT operating current and physical string ports.
Recommended wiring text based on safe series + safe parallel per MPPT.