Calculadora de Lucro de Turbina Eólica
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
kWh/ano = kW × fator_capacidade × 8760; receita = kWh × tarifa; payback = custo / receita
About this calculator
The Wind Turbine Profit Calculator estimates the annual revenue and return on investment (ROI) of a wind energy system. It considers the turbine's rated power (in kW), the average capacity factor of the site, the electricity tariff (R$/kWh), and the total installation cost. The tool calculates the energy generated per year (kWh/year = kW × capacity_factor × 8760 hours), the annual revenue (kWh × tariff), and the payback time (cost ÷ revenue).
This calculator is useful for rural landowners, businesses, and investors who want to assess the economic viability of a small to medium wind project. It helps compare different turbines, analyze the impact of subsidies or tariff variations, and plan the financial return over the years.
Important considerations: the capacity factor strongly depends on local wind conditions (average speed, consistency) and should be obtained from reliable measurements or historical data. The tariff should be net (excluding taxes), and the total cost must include equipment, installation, permits, and maintenance. The payback is linear and does not consider future maintenance costs or inflation.
The calculator does not replace a detailed feasibility study but provides a quick initial estimate. For larger projects, consulting a specialized wind energy engineer is recommended.
Frequently asked questions
What is the typical power of a residential wind turbine?
Usually between 1 kW and 10 kW, depending on consumption and available space.
What is capacity factor and how to estimate it?
It is the ratio of actual energy generated to the maximum possible. For wind turbines, it ranges from 20% to 40% in good locations. Use local wind data or consult wind maps.
Does the calculator consider maintenance costs?
No. The payback is linear and does not include maintenance, which can be 1% to 3% of the initial cost per year.
Can I use the calculator for large turbines?
Yes, but for large-scale projects (MW), a more detailed study with power curves and financing is necessary.
Is the electricity tariff the same for all generated energy?
It depends. If net metering is available, the tariff may be the same as the utility's. Otherwise, consider the sale price in the free market.