Do you have any idea how much you need to pay for solar panel installation? The cost of the solar panel installation depends on the size and the type of solar panel. A single solar panel costs 350 to 500 euros. There is a domestic size which is a very common 4kW solar panel system, its costs around 6000 euro. And it will be able to cover around 29 square meters of your roof.  Due to advancements in solar energy, the cost of a solar panel reduces drastically. You can check the following chart to know the average prices of solar panels. Installers require roof space and they want to know the average saving on your electricity bills and the total savings you can expect after 20 years. The more electricity you will consume, the more you have to pay the cost. But for, in the long run, you will be able to sae higher. For example, if you will install 3kW, it will be cheaper during installation but you will not be able to as much as the power you will earn from the 6KW system for 25 y