Solar panels are warranted by manufacturers to last 25 years. Considering the panels themselves have no moving parts, they can continue producing enough energy to cover operating costs for up to 35 years or more. Inverters, the equipment that changes the DC power produced by the solar system into the AC power that our appliances and buildings use, have a lifespan of about 15-20 years. After that point, it is expected that new inverters will be installed to take advantage of the remaining life of the panels.