Does the result include net metering?

We cap savings at your consumption. Full net-metering credit needs an admin-configured per-country toggle.

Where do peak sun hours come from?

Approximate annual averages for the capital. Enter your city's value in advanced mode for more accuracy.

This calculator targets grid-tied systems. Off-grid needs batteries and different math.

No. This helps you understand feasibility. A licensed installer must do the site assessment.

Payback shifts accordingly. Enter a new tariff value to see the impact.

Is solar worth it? Estimate payback period and lifetime savings.

Decision calculatorGeneral editable assumptionsGlobal-readyScenario comparisonInteractive chart

Last updated: 2026-05-16

This calculator uses generic assumptions. Use advanced mode to override them for a more accurate result.

Source: default

Payback = Cost / Net Annual Savings

Does the result include net metering?: We cap savings at your consumption. Full net-metering credit needs an admin-configured per-country toggle.
Where do peak sun hours come from?: Approximate annual averages for the capital. Enter your city's value in advanced mode for more accuracy.
On-grid vs off-grid?: This calculator targets grid-tied systems. Off-grid needs batteries and different math.
Does this replace an engineering study?: No. This helps you understand feasibility. A licensed installer must do the site assessment.
What if the utility changes tariffs?: Payback shifts accordingly. Enter a new tariff value to see the impact.

Results are estimates and not professional advice. Verify important decisions with a qualified professional.