Payback Painel Solar

custo/(kWh_ano · tarifa).
Created by
Renato Passos, Eng. de Software
Reviewed by
Renato Passos, Eng. de Software

Last updated: Apr 18, 2026

Payback (anos)
4,9

Formula

payback

About this calculator

The Payback Solar Panel Calculator is a useful tool to evaluate the financial viability of installing solar panels in your home or business. Payback is the period necessary for the investments in solar panels to be recovered through the energy savings generated.

This calculator uses the payback formula, which is calculated by dividing the cost of the solar panel installation by the cost of the energy generated per year, multiplied by the energy tariff. This provides an estimate of the time necessary for the investment to be recovered.

It is essential to remember that payback may vary depending on several factors, including location, solar panel efficiency, and energy tariff. In addition, it is recommended to consider the additional benefits of using solar energy, such as reducing dependence on fossil fuels and contributing to global warming mitigation.

Here are some important considerations to keep in mind when calculating payback: ensure the energy tariff is up to date; consider inflation and the variation of energy cost over time; and remember that payback may be influenced by external factors, such as changes in energy policies or solar panel efficiency.

Frequently asked questions

What is payback?

Payback is the period necessary for the investments in solar panels to be recovered through the energy savings generated.

What factors influence payback?

The factors that influence payback include location, solar panel efficiency, and energy tariff.

Why can payback vary?

Payback can vary depending on various factors, including changes in energy policies or solar panel efficiency.

How can I ensure the energy tariff is up to date?

Ensure you regularly check the energy tariff to guarantee it is up to date.

What are the additional benefits of using solar energy?

The additional benefits of using solar energy include reducing dependence on fossil fuels and contributing to global warming mitigation.

Other Energia Renovavel Avancado calculators