Do Solar Panels Need to Be Cleaned?

One of the questions we often get from homeowners is, “Do solar panels need to be cleaned?” It’s understandable as no one wants to climb onto their roof for regular maintenance.
It’s true that solar panels work most effectively when they are clean. Those that are covered in dirt and debris are not as effective at converting sunlight to electricity. However, in most cases, the loss of power from minor dirt buildup is small – from 1 to 5 percent, but long-term buildup of dirt can have a greater impact on energy generation.

Maintenance of Solar Panels

While the greater Phoenix area doesn’t get as much rain as other locales, it does get enough to wash away much of the dirt that accumulates on rooftop solar panels. However, during monsoon season, which runs from the beginning of July through September, dust storms can cause enough buildup to warrant the need for professional cleaning.

DIY Cleaning

If you want to tackle the job of cleaning your home’s solar panels, you’ll want to use a soft-bristle brush with an extended handle, such as one that you would use to clean a recreational vehicle. Use an eco-friendly soap and soft water to wash away dirt. For areas of panels that are hard to access, you can also use a high-pressure hose nozzle with an attachment that holds soap.

Other tips for do-it-yourselfers include:

Don’t go on your roof without a sturdy, secure ladder and fall-protection equipment.
Turn off your system before you begin cleaning panels. Not sure how to do that? Call Cool Blew Solar for guidance.
Don’t use hard water which can lead to mineral deposit buildup on panels.
Don’t use abrasive brushes or cleansers which can cause scratching of panel surfaces.
Clean panels in the morning before they heat up.
Do a monthly visual inspection of your panels to gauge the amount of dirt buildup.
Check your utility bill for any measurable drops in efficiency potentially caused by dirt accumulation.
Don’t take chances. If you’re not sure if you can safely clean your solar panels, don’t do it! Call in the professionals.

Have more questions about solar panels for your home? Call the experts at Cool Blew Solar.

FAQ's

Is Solar Energy Expensive?

The size of your panel installation and the needs of your home will affect your costs. The average net cost of a 5.69kW system is $13,838 cash after 30% rebate (according to solar-estimate.org). An average-sized system can cost up to $35,000. Larger installations will require more hardware, planning and construction time. This can further increase costs. While solar panels are expensive, they have many distinct benefits. Cool Blew Electric & Solar’s experts can assess your situation and goals and recommend a cost-effective system to meet your needs.

How Much Can I Save By Installing Solar Panels?

An average-sized system (5 kilowatts) can reduce up to 50% of your monthly electricity bill. A 5.69kW system would offset 100% of your energy usage if your typical monthly bill is $138. Over a period of 20 years, these savings can add up to $30,000, based on your location and energy usage.

How Long Would It Take to Recoup My Solar Investment by Solar Energy Savings?

With a 5.69kW Solar system you would recoup your savings in 7 years and 2 months but with continuous Utility increases every year your Return and Investment will be much sooner.

What is a Solar Lease Program?

The Solar Lease Program has been one the most popular option that homeowners have chosen over the years. Solar Lease programs gives homeowners the opportunity to take advantage and put Solar on their homes and a guaranteed savings from their Utility for little to no money out of pocket. Most Leases are 20 year power guarantee from the solar provider and includes fixed monthly payments, no repair cost, fully insured and warrantied for the life of the system.

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