The payback period for a photovoltaic system depends on various factors, such as the size of the system, the components installed, power consumption, and the costs of the system. Typically, the payback period for a system is between 8 and 12 years, depending on the specific circumstances. However, there are cases where the payback time can be faster or slower, especially if there are government subsidies or feed-in tariffs. It’s important to note that a photovoltaic system is typically designed to last at least 25 years, meaning it can provide free electricity for many more years after the payback period.