Engineering

String Sizing Calculator

Calculate optimal string length based on module specs, inverter input range, and temperature.

Module Specifications

Voc (V)Open-circuit voltage at STC

Vmp (V)Max power voltage at STC

Temp Coefficient Voc (%/°C)Typically -0.25 to -0.35

Record Low Temp (°C)NEPA: ~-20°C

Record High Temp (°C)Cell temp, not ambient (~+25°C)

Max DC Input Voltage (V)

MPPT Low Voltage (V)

MPPT High Voltage (V)

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Min Modules/String

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Max Modules/String

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Recommended

Condition	Voltage	Status

Get a custom analysis from our engineering team.

570-MY-SOLAR (570-697-6527) · solarmason.com · engineering@solarmason.com

Disclaimer: Estimates for informational purposes only. Actual results vary. Consult a qualified professional before making decisions.