Skip to content
Log in Calculators

Solar String Voltage Calculator

String voltage at STC and on cold mornings.

Inputs

Inputs and assumptions

Panels wired in series.

Max-power voltage per panel.

Open-circuit voltage per panel.

Record-low temperature in Fahrenheit. Uses a typical crystalline-silicon Voc coefficient of -0.3%/C; check the panel datasheet.

Result

String Vmp
—
String Voc (STC)
—
String Voc (cold)
—

What to check

  • Panels per string
  • Vmp and Voc from the datasheet
  • Coldest temperature in Fahrenheit

Related calculators

This calculator is a first-pass screening tool. Verify your utility tariff, metered usage, equipment specifications, and installer quotes before making a decision.

Saved calculations

Keep the assumptions with the result.

Save this calculation to return to the inputs, result, and report anytime.

Sign in to save Create account

Sign in or create an account to save this calculation.