PV systems produce electricity from solar energy. They work completely silent. The manufacturing industry guarantees a minimum rated capacity of over 20 years.
With the network-connected photovoltaic generating systems current to it directly into the local electricity grid and sell it to the power producers.

The companies are required to purchas our own produced energy at a significantly higher amount, as we have to pay them for the current acquired there.
This means in practice that the investment pays for itself quickly.

By the government-guaranteed payment terms, a safe and profitable investment.