Once solar panels have been installed and they are functioning properly, they require very little maintenance throughout their entire life span. The only periodic maintenance that you may have to complete is to clean off any dirt, leaves, or other debris that may be obstructing the transmission of energy from the sun's rays. If you live somewhere that gets substantial snowfall, you may have to periodically clean the panels as well. You will want to do routine cleaning of your solar panels at least 4 times a year no matter the weather conditions. Most solar panels come with a standard warranty as well. If not, you should choose a different company that offers a warranty or look at purchasing additional warranty coverage through a solar panel installation company. A warranty should be useful if for any reason you do have any major issues arise with your solar panels or if your panel's energy production drops below 85%. Before purchasing solar panels you should read up on the fine print of what the warranty covers. Keep in mind your solar sales rep may be on commission. Therefore, they may fluff up the warranty to make it sound better than it is. Solar panels can last for 25 years or more. That is a considerable amount of time to reap the benefits of solar power in your home in exchange for very little maintenance in return. That is one of the main selling points that counteracts the turnoff some people experience when they learn about the upfront costs. Solar panels will pay for themselves over and over again over the course of their lifetime.