How much does solar panel cleaning cost?

Having solar-electric panels on your home can significantly reduce the amount you pay in energy bills. But over time, these panels can become coated by leaves, pollen, pollution, dust, grime, bird droppings, and ash. All that gunk and debris can block sunlight, cutting the solar panels’ efficiency.

To keep solar panels performing at their peak, it’s a good idea to check and clean them yearly. 

The key is to avoid scratching or damaging them, which can permanently reduce their efficiency. 

If panels are ground-mounted, you might be able to wipe them down with sudsy dishwashing detergent, warm water, and a soft cloth or sponge. But if they’re on the roof of your house, this job is usually best left to a professional solar panel cleaning service. 

This cost guide discusses the factors and variables that affect the cost of solar panel cleaning.

Learn more: How much does it cost to install solar panels?

Costs for cleaning residential solar panels can be quoted as a flat rate—for an entire roof—or by the panel. In most cases, it’s best to get a bid for cleaning all of the panels. Many companies have a minimum charge of $75 or more.

Average cost to clean all solar panels on an average 1,600–2,000-square foot house (flat rate): 

Low: $95

Avg.: $200

High: $350

Average per-panel cost for cleaning:

Low: $3

Avg.: $7

High: $20

The cleaning company will supply materials and equipment, but most of the cost is for labor. As a result, the exact price will be affected by the size of your solar array and the difficulty of the work. 

Your roof’s steepness and height can also come into play, since these affect the risk involved and equipment needed. The amount of debris buildup on the panels can also make a difference, if removing it involves any specialized procedures. 

The area where you live might also affect the cost of cleaning solar panels—larger cities tend to command higher labor prices. 

Like any chore that involves climbing up on the roof, cleaning solar panels can be risky for homeowners. Professional solar panel cleaning companies are trained with the necessary knowhow and safety practices. They have the equipment needed to leave your dirty solar panels spotless, so they soak up as much sunlight as possible

If you do hire a solar cleaning service, be sure they have at least 2 years of experience, as well as liability and worker’s-compensation insurance.

How long do solar panels last?

Solar panel lifespan and warranty coverage varies considerably between companies. Premium brands like LG and Panasonic provide 25-year warranties for a solar energy system. Other companies may only cover their products for 10–12 years. In either case, they’re likely to last at least that long with good solar panel maintenance.

Can you use a pressure washer to clean solar panels?

While this might seem like the perfect tool for the job, some pressure washers and nozzles can damage the surface of your solar panel system. A gentle cleaning with sudsy water and a soft cloth or sponge is recommended—or better yet, leave the cleaning of this expensive equipment to professionals. 

Can you walk on solar panels?

It’s not a good idea—this can scratch or even break them. Solar panels have a layer of tempered glass on the top, which is designed to withstand moderate encounters with hail, small branches, and animals. The strength of this glass, and the metal frame beneath the panels, varies among different types. Ask your installer about the details of your chosen solar power system. 

Find a solar panel cleaning service in your area.