How to Clean Solar Panels: Sun’s Clean Energy Deserves a Clean Surface

How to Clean Solar Panels: Sun’s Clean Energy Deserves a Clean Surface

Did you ever wonder why your solar panels aren’t yielding as much power as they used to? The answer could be staring you in the face; they’re dirty. It’s as simple as that! Sunshine has to penetrate the panels for them to function optimally. And let’s face it; grime doesn’t exactly scream transparency. Now, let’s dive into the captivating yet often-overlooked world of how to clean solar panels.

how to clean solar panels How to Clean Solar Panels: Sun's Clean Energy Deserves a Clean Surface

The Dirt on Dirty Solar Panels

The irony is as thick as the layer of dust on a neglected solar panel: we’ve got this high-tech device designed to tap into the sun’s endless stream of renewable energy, and a bit of dirt can put a damper on the whole show.

According to a study conducted by Google (yes, the search engine giant has its fingers in many pies, including solar), solar panel efficiency can drop by as much as 25% due to accumulated dirt and debris. Annoying, right? Let’s just put it this way: If your solar panel was a car, that’d be like having a flat tire.

It’s a common misconception that solar panels are ‘self-cleaning’. But unless you live in an area with frequent and ample rainfall (the keyword here being ‘ample’) or you’ve invested in self-cleaning panels (yes, they’re a thing), chances are your panels need a good scrubbing.

Now, you might wonder, “Is it worth all the effort?” Well, imagine this: You’re running a marathon but forced to wear a thick, fluffy winter coat. You’d probably want to ditch the coat, wouldn’t you?

Step-by-Step: How to Clean Solar Panels

Alright, let’s dive right in. But before we do, let me ask you a question. Would you use a scouring pad to clean your smartphone screen? No? Then don’t use one on your solar panels, either.

  1. Safety first: Solar panels are usually placed high up, which means ladders, safety harnesses, or professional help might be necessary. There’s no point saving a few dollars on your energy bill if you spend it on hospital bills instead!
  2. Timing is key: Much like your morning jog or the perfect barbecue, there’s an optimal time for cleaning solar panels – early morning or late afternoon. Why? Well, the panels are cooler, which prevents the water from evaporating quickly and leaving a dirt-attracting residue.
  3. Gentle is the way to go: A soft brush, a sponge, and a lot of patience will do the trick. Remember, solar panels are not indestructible. They don’t need a vigorous scrubbing session with an abrasive brush. Treat them like you would a high-end luxury car, and they’ll serve you well.
  4. Chemicals? No, thank you: Stick to mild dish soap and water. Acidic or abrasive cleaners can damage the panels. And frankly, no one likes to bathe in bleach, right?

Solar Panel Cleaning Services: The Saviors of Sunshine

If DIY isn’t your thing, you’re not a lost cause. Professional solar panel cleaning services exist for a reason. It’s like a spa day for your solar panels. Plus, you get to enjoy a cup of coffee while someone else does the hard work. Who said renewable energy couldn’t be luxurious?

Remember Shakespeare’s words, “Some are born great, some achieve greatness, and some have greatness thrust upon them.” In this case, ‘greatness’ could very well refer to ‘clean solar panels’. Y

ou might not be born with a knack for cleaning solar panels, but you can certainly have cleanliness thrust upon your panels with the help of professionals. It’s a worthy investment, particularly for commercial installations where a dip in efficiency can mean a significant dent in the pocket.

Some Myth-Busting Fun

Here’s a fun one: Some people believe bird droppings will ‘eat away’ at solar panels over time. Now, while I’m all for a bit of melodrama, let’s set the record straight. Bird droppings might be unsightly and can temporarily reduce the efficiency of your panels, but they won’t cause them to disintegrate into thin air. It’s not an Alfred Hitchcock movie, folks!

The Invincible and The Vulnerable: Solar Panels

Solar panels are designed to withstand the elements: wind, rain, and even hail. But while they’re superheroes in the face of mother nature’s whims, they can’t do much about a thick layer of dust or a stray football from next door.

As the saying goes, “With great power, comes great responsibility.” And when it comes to harnessing the power of the sun, the responsibility to maintain clean solar panels lies squarely on our shoulders.

The Big Question: How Often Should You Clean Solar Panels?

According to the CEO of MyRoofingPal, the general rule is to clean your solar panels every six months. But it does depend on your local weather and other factors​​. 

Most professionals recommend cleaning solar panels every six months to a year, depending on the dirt and pollution in your area​. At a minimum, you should give them a thorough clean at least once a year. It can improve energy output by as much as 12% compared to panels only cleaned by rainfall if you can manage it twice a year, even better​4​.

Remember, this isn’t just about cleanliness. It is about the longevity and performance of your solar panels. It’s like taking your car for regular oil changes. You wouldn’t want to break down during a road trip, would you?

Cleaning solar panels doesn’t necessarily require specialized products. A simple combination of mild dish soap and water is usually sufficient. However, if you’re looking for more professional solutions, there are several products on the market designed specifically for solar panel cleaning:

  1. Solar Panel Cleaning Kits: These kits often include a biodegradable soap, a wiper, and sometimes even a telescopic pole for hard-to-reach panels. They provide all the tools you need for a thorough, safe cleaning.
  2. Eco-friendly Solar Panel Cleaners: If you want to ensure that your cleaning process is as environmentally friendly as your energy source, eco-friendly solar panel cleaners are available. These products are made from natural ingredients and are designed to clean your panels without causing harm to the environment.
  3. Deionized Water Systems: While this option is more expensive, deionized water systems are incredibly effective for cleaning solar panels. They use water with its ions removed, allowing it to clean the panels without leaving residue behind.
  4. Solar Panel Cleaning Robots: For those willing to make a significant investment, solar panel cleaning robots provide an automated solution. They can be programmed to clean your panels regularly without any intervention needed.

Remember, while specialized products can help, they aren’t necessary for maintaining clean solar panels. Regular cleaning with mild soap and water can often be just as effective. And regardless of the method you choose, always be sure to follow safety procedures to avoid any accidents or damage to your panels.

Frequently Asked Questions:

Can I use any detergent to clean my solar panels?

Not all detergents are created equal, my friend. Some are too harsh for the delicate solar panels. Stick to mild ones, or use a solar panel cleaning solution. It’s like choosing a mild shampoo for your baby’s hair. You wouldn’t use the one that promises ‘extra volume and bounce’, would you?

Can I use a power washer to clean my solar panels?

Imagine going to a gallery and seeing someone using a power washer to clean the Mona Lisa. Sounds horrifying, right? That’s pretty much what using a power washer on your solar panels would look like. They’re delicate pieces of technology, not your backyard patio.

How can I tell if my solar panels need cleaning?

If you start noticing a decrease in your energy output, that might be a sign your panels need a good scrubbing. A visual check can also reveal dirt, bird droppings, or leaves. It’s a bit like when your computer starts slowing down, you don’t need to be a tech whiz to know something’s up.


Harnessing the sun’s power is a noble endeavor, but like all good things, it comes with responsibilities. Remember to clean your solar panels regularly, treat them gently, and when in doubt, seek professional help. After all, a clean solar panel is a happy solar panel, and who doesn’t want to spread a bit of happiness?

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MC Electrical & Communications
1 year ago