The price of solar energy in São Paulo, Brazil
From time to time I check the price of solar energy to see if it is feasible for my house in São Paulo.
I accessed the solar portal and used the calculator available. To produce 6 thousand kWh per year the investment is of R$ 28 000 (USD 7 500) associated to a 5 kW system.
My financial calculator indicates that for a period of 5 years of amortization and considering 1% of interest per month, it turns out that, the monthly payment of this investment is R $ 623. Equivalent to R$ 1.2/kWh with respect to the 500 kWh/month energy delivered by the system.
ELETROPAULO, which is the concessionaire that connects my house to the public grid, sells energy at R$ 0.6/kWh.
Even if you take into account the tax subsidies that you may get, there is no way to justify the investment. It means that the energy of the public grid, predominantly produced from hydroelectricity, is way more competitive than solar, even considering the entire value chain involved (generation, transmission and distribution).