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Energy Calculator

Free energy calculator to estimate solar panel system size. Instant results in your browser — no signup.

Also known as: Estimate solar panel system size, solar panel calculator, Calculate battery backup runtime, estimate solar panel system size calculator, estimate solar panel system size, energy construction & engineering, energy estimate solar panel system size

Direct calculator

Inputs

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 energy calculator to estimate solar panel system size. Instant results in your browser — no signup. 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.