The cost of a solar PV (Photovoltaic) system can vary widely depending on several factors, including the size of the system, the type and quality of solar panels used, installation complexity, location, and any additional features or components.    For residential installations, a typical solar PV system in the United Kingdom may cost anywhere from £4,000 to £14,000 or more, depending on the factors mentioned above. On average, the cost per kilowatt (kW) of installed solar capacity ranges from £1,500 to £2,500.   It’s important to note that the solar PV system’s cost should be considered as a long-term investment, as it can help save money on electricity bills over time, provide energy independence, and contribute to a more sustainable environment.