What about wear and tear, how long does it last?

A solar power system like ours, that uses photovoltaic panels mounted in a fixed position on your roof, requires basically no maintenance. Plus, the power output of the panels is generally guaranteed for at least 20 years, depending on the manufacturer.

So there’s really not much to worry about in terms of wear and tear and maintenance. The panels themselves are designed to operate year round, and their surface is made from tempered glass that can withstand moderate impacts from hail and other debris.

If the panels are mounted on an angle, then rain will do an adequate job cleaning them.

If you have moving parts in your system, such as a tracker that moves your panels to face the sun, then you may face additional maintenance issues.

The inverters are not usually guaranteed for as long as the solar panels themselves, so if there is a major part that may need replacing during the normal service life of the system, it is likely the inverter. However, at current prices, the inverter represents between 5% and 10% of the entire cost of the solar power system, so even if it is replaced once during the life of the system, that is still a very low maintenance cost overall.