Certified solar energy products and systems generally are reliable, with a life expectancy of about 30 years. Manufacturers test solar panels for hail impact, high wind, and freeze-thaw cycles to represent real-life situations. Most manufacturers offer 20- to 25-year warranties for panels; extended warranties may be available at an extra cost.
Little maintenance is required; occasionally it may be necessary to rinse modules off with water to remove dust and grime. Other components like inverters may have a shorter life. Solar panels may outlast the roof where they are attached. Make sure your roof is in good shape or budget for replacement during the life of the system.
As this technology grows in popularity, so does the potential for deceptive or fraudulent sales tactics. A solar photovoltaic (PV) installation is a big investment, and you want to make sure you select a reputable solar contractor with licensed installers.