The return on investment is around 4 to 5 years, depending on the location where it is installed. Investing in solar energy goes far beyond a sustainable decision; it's also one of the smartest financially viable alternatives available on the Brazilian market. In the United States, home solar panels generally take between 7 to 10 years to pay for themselves in utility electricity costs avoided. In this guide. Payback time: it costs 0,94BRL ($0. 19) per kWh here, so if I used 1500kWh per month my energy bill would be almost 1. 500BRL ($300), that means I could in theory recoup the money invested in less than 2 years! Community share system: the enery company does not buy the excess energy generated. Solar payback period by country 2026: 4–15 year range across 30+ countries. Solar payback periods by country in 2026: Germany 7–10 years, Italy 5–8 years, Spain 5–8 years, France 7–11 years, UK 8–12 years, India 4–6 years, Australia. Solar payback period is the time it takes for electricity savings, export credits, and incentives to recover the net cost of a solar PV system. This tool estimates the break-even year, discounted payback, 25-year savings, ROI, NPV, IRR, lifetime production, and financing cash flow. Location defaults to match your currency.