# Cold Temperature Voc Calculator

Apply a signed module voltage coefficient to a colder module temperature.

[Open this tool](https://whatson.pk/cold-voc-calculator/)

Category: Solar & Battery

A module's open circuit voltage can increase as its temperature drops. The datasheet coefficient provides the calculation basis.

Enter the signed Voc coefficient and a suitable cold module temperature. Compare the corrected voltage with the reference condition.

## Inputs and controls

* Reference open circuit voltage (V). Allowed range: 0.01 to 1000
* Voc temperature coefficient (%/°C). Allowed range: -2 to 0
* Reference cell temperature (°C). Allowed range: -80 to 100
* Minimum module temperature (°C). Allowed range: -80 to 100
* Panels in series (panels). Allowed range: 1 to 1000

## How to use

* Enter reference open circuit voltage, voc temperature coefficient and reference cell temperature.

* Enter minimum module temperature and panels in series.

* Select Calculate result. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.


## Why use this tool

Showing the coefficient and temperature makes the correction traceable during a string voltage review.


## Before relying on the result

Uses a linear coefficient from the datasheet and an entered module temperature. A site minimum and equipment margin require design review. This does not select a permitted string length.


## Tool limitations

Uses a linear coefficient from the datasheet and an entered module temperature. A site minimum and equipment margin require design review. This does not select a permitted string length.

## Questions

### Does this select the permitted series count?

No. Equipment voltage limits, site minimum temperatures and design margins need a separate string check.

### What should I check before using Cold Temperature Voc Calculator?

Check Reference open circuit voltage, Voc temperature coefficient, Reference cell temperature and Minimum module temperature. Use the exact units shown beside the controls and replace any example values with your own inputs.

Source page last modified (UTC): 2026-10-01T18:56:36+00:00

This profile describes the tool. It does not execute it or supply a professional certification.