How long do solar panels last – Solar panels offer property holders an incredible way to reduce their carbon impact. The life expectancy of solar panels will allow you to create energy for a longer period of time, providing exceptional returns from the enterprise. Solar panels otherwise called photovoltaic or PV panels are built to last more than 25 years. The standard will guarantee 25 years for the normal future of the solar panel. After 25 years, your solar panel will not be guaranteed to be replaced; However, their ability to retain daylight will be reduced.