Do I even need to wash my commercial solar panel installation? This is a suitable question with many answers. If you ask a company that specializes in solar panel cleaning, they would say ‘yes’. They might even suggest cleaning them regularly, or opting for a bi-weekly, monthly, quarterly or annual scrub. According to the National Renewable Energy Laboratory (NREL), a dirty solar panel has a reduced output by up to 25%. Clearly, having cleaning panels is a good thing. But how often is good enough?

NREL recommends cleaning in regions where there is infrequent rainfall, such as in desert climates. A majority of panels are mounted on brackets on an angle. This means when it rains, the water will automatically rinse of debris, bird droppings and dirt. The action is similar to rain falling on your car’s windshield.

If you reside in an area that gets frequent dust storms, blowing dust or dirty rainstorms that sticks, then you can expect some sort of build up to occur on your solar panels. You can wait for the next rain to wash it off, but in consequence your panel output will reduce.

So whether you should get your panels cleaned or not is your call. Steer clear from companies selling the concept of 'weekly or monthly’ panel washing. They’re trying to sell you services which you don’t require.

We recommend delaying signing the maintenance contract. Observe how your panels generate electricity. From time to time, see how much dirt and grime accumulates on your panels. Does this seem to affect the output? Opt for a single professional clean and then observe your panel’s output again. Is it better? If cleaning your solar panel system helps increase the output, then it might help contracting a company.

At OhSolarMio, we recommend an annual inspection and commercial solar panel installation cleaning. You can opt to do it yourself, but avoid using harsh chemicals, pressure washers and abrasive scrubbers. This can damage your panels. From a safety perspective, hiring a professional company for bi-annual or annual clean is your best option
Contact OhSolarMio today.