Certified PV products and systems generally are reliable:
- They have a life expectancy of about 30 years
- Manufacturers test PV 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. PV panels may outlast the roof they are attached to. Make sure your roof is in good shape or budget for replacement during the life of the system.