Investment in a solar system, unlike investments in equipment for conventional fuels, is paid back in a few years, and the rest of the time until the lifetime of the solar equipment, which is a period of 20 to 30 years, the owner has free energy. Most often, the payback periods for residential buildings or other buildings of similar square footage range from 5 to 10 years, which is constantly decreasing, taking into account the constant increase in the price of primary energy sources and the decrease in the price of solar equipment.
The recent increase in the production of photovoltaic solar panels, along with a drop in price, opens up a large number of new markets for a wide variety of applications, such as telecommunications, lighting, street or surrounding lighting for residential buildings and commercial buildings, providing energy for entire settlements, etc. All these and other applications have proven to be very competitive and cost-effective compared to existing technologies.