Solar Panel System Size Calculator

Free solar panel system size calculator for solar panel calculator. Enter the values below to get an instant result.

JavaScript is required for live calculation.

You can still read how Solar Panel System Size Calculator works, the formula, examples, and FAQs below.

Electricity use
Sun hours
Panel rating

Inputs

Electricity use

Sun hours

Panel rating

Results update when you click Calculate.

System size (kW)

2.00

(electricity_use) / ((sun_hours) * (panel_rating) || 1)

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Recently used

Tools you open will show up here on this device — with your last inputs when available.

What this result means

Free solar panel system size calculator for solar panel calculator. Enter the values below to get an instant result. Estimate solar panel system size: (electricity_use) / ((sun_hours) * (panel_rating) || 1).

Assumptions

Rule dependency: Location/assumption dependent.

How it works

Estimate solar panel system size: (electricity_use) / ((sun_hours) * (panel_rating) || 1).

Example

Example: “solar panel calculator”. Enter your values and click the button to get a result.

Frequently asked questions

What does this solar panel system size calculator do?+

It helps you estimate solar panel system size. Typical search: “solar panel calculator”.

How should I read the result?+

Estimate solar panel system size using electricity use; sun hours; panel rating. Result: required system size/panels.