The economic profitability of a solar farm depends on several factors, such as the power of the installation, the price of electricity and the investment costs. In Spain, the profitability of solar farms has increased in recent years, due to the increase in electricity prices and the subsidies offered for the installation of renewable energies. In general, solar farms can have a high economic profitability, especially in the long term. Conclusions Solar farms are a clean and efficient technology for generating electricity from solar energy. Solar farms can be installed anywhere where sunlight is available, although flat, sunny soils are preferred. The economic profitability of solar farms has increased in recent years, due to the rising price of electricity and the subsidies offered for the installation of renewable energies.