How to Clean Solar Panels: A Comprehensive Guide

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If you’ve invested in solar panels, you understand their power. But just like any other investment, they need care to perform at their best. This is where cleaning comes into play.

Dirt and debris can cause a significant drop in your system’s efficiency—up to 25%. So how do we tackle this? Well, knowing how to clean solar panels on the roof or from the ground is essential.

Regular upkeep can not only aid in the production of solar energy, but it can also help to prolong the life of your apparatus. Think of it as giving your car a good wash and tune-up—it runs better afterward, right?

The great news? Cleaning solar panels isn’t rocket science. With some basic tools and know-how, anyone can get started on keeping their panels shining bright for optimal performance.

Basic Cleaning Methods

Cleaning solar panels with soft brush and water

Cleaning your solar panels isn’t as tricky as you might think. One of the simplest methods is to use water and a soft brush. This method can help remove light dust or bird droppings without damaging the panel’s surface.

If you’re dealing with more stubborn grime, consider rinsing your panels with a water hose on a low-pressure setting. But remember, don’t go full blast; high pressure could damage them.

DIY cleaning solutions are also an option for those who prefer homemade fixes. A mix of warm water and dish soap often does the trick. Just make sure to rinse thoroughly afterward so no residue remains.

The ground-based cleaning method offers safety benefits, especially if your roof is steep or slippery when wet. Tools like extension poles fitted with soft brushes let you clean from below safely while giving those hard-to-reach spots some love too.

Best Practices for Cleaning

Cleaning solar panels might seem daunting, but with the right tips, it’s a breeze. Accurately timing and executing the process is key.

The first tip is cleaning frequency. Dust can reduce your panels’ efficiency by up to 25%. So, aim for at least two cleanings per year – once after winter and another during late summer.

Next, let’s talk about the best time of day for cleaning. Early morning or late evening are ideal because the sun isn’t as strong then. This helps prevent water spots from forming on your panels due to quick evaporation in intense sunlight.

Safety should always be paramount when dealing with rooftop installations like residential solar power systems. Make sure you’re wearing sturdy shoes that grip well on rooftops along with gloves to protect your hands from sharp edges or hot surfaces during midday cleanings.

Last but not least: equipment. Use soft brushes or squeegees attached to long poles so you don’t need ladders – think window cleaner style.

Cleaning from the Ground

Cleaning Solar Panels from the Ground

Keeping solar panels clean is crucial, but climbing on your roof might not be ideal. Fortunately, you can get the job done right from terra firma. It’s possible to clean your solar panels without ever setting foot on a ladder.

To do this effectively, you’ll need some specialized tools like an extension pole and a soft brush. Attach the brush to the pole and gently scrub away any dirt or grime present on the panel surfaces. Don’t forget to rinse them with water after brushing.

The advantages of ground-based cleaning are many. First off, it keeps you safe – no risk of falls or injuries here. Secondly, it saves time as there’s no constant ascending and descending ladders involved. Lastly, using long-reach equipment lets you maintain consistent pressure while cleaning across all areas of your array.

Impact Energy, our Denver-based company has years of experience helping homeowners keep their systems in top shape—ground level maintenance included.

Cleaning Solutions and Materials

Selecting the appropriate materials for cleaning your solar panels is critical. Using a soft brush or squeegee can help avoid scratches that might impact panel efficiency.

A basic solution of warm soapy water often does the trick for regular cleanings. But, if you’re dealing with more stubborn grime like bird droppings or tree sap, you may need a specialized solar panel cleaning products.

If heights aren’t your thing or accessing the roof seems risky, consider using an extension pole with a soft brush attachment for ground-based cleaning. Not only will this let you keep your feet firmly on terra firma but also helps ensure safety while doing routine maintenance.

Remember though: never use harsh chemicals or abrasive tools as they can damage the surface of panels and affect their ability to absorb sunlight effectively.

Automatic Cleaning Systems

Cleaning solar panels with Automatic Cleaning Systems

Cleaning solar panels manually can be a bit of work. But don’t worry, automatic cleaning systems are here to help. These systems take the stress out of maintaining your panels’ efficiency.

Some automatic cleaners use robotic technology that glides over your solar array, gently removing dust and grime. This is similar to how Roomba vacuums clean floors.

The main advantage? You won’t need to climb onto the roof or hire professionals for routine cleaning jobs. Plus, these devices operate at night when panels are cool and energy production is idle, reducing risks associated with daytime heat exposure.

A few brands offer such solutions – like Heliotex, known for their quality products. It’s important though to weigh up costs as these systems might require an initial investment.

Polishing Solar Panels

Some may wonder if they need to shine their solar panels, but it’s usually not required. Solar panels are designed with durability in mind and their surfaces are generally self-cleaning.

Solar panel glass often has an anti-reflective coating that helps maximize light absorption. Polishing could potentially damage this coating, leading to reduced energy production.

If your panels seem dull or dirty after a simple cleaning procedure using water and mild detergent, you might be dealing with more stubborn grime like bird droppings or sap. In such cases, professional cleaning services can help without causing any harm to your panels.

Solar Panel Inspection

Solar Panel Inspection

Regular inspection of your solar panels is crucial. This not only helps to identify any issues or damage early but also ensures that cleaning efforts are effective.

Start by looking for signs of physical damage, like cracks or chips in the glass surface. While solar panels are built to withstand weather conditions, hail storms and falling debris can cause harm.

You’ll also want to keep an eye out for dust and dirt build-up which might affect power generation efficiency. Bird droppings can be a bit more stubborn, so take note if you see these too.

Detecting Efficiency Issues

If your energy bills have been higher than usual despite normal usage patterns, it could indicate an issue with your solar panel system’s efficiency. Perhaps there’s shade obstructing sunlight from reaching the panels properly or maybe one or more components need replacing.

An annual professional inspection can help detect such problems early on. But remember: safety first. If climbing onto the roof feels risky, don’t hesitate to call in professionals who specialize in Denver-based solar installations.


Cleaning your solar panels is a key part of maintaining their efficiency and longevity. With regular cleaning, you can make sure they’re working at full capacity, turning the Colorado sun into power for your home or business.

Whether you use water and a soft brush, rinse with a garden hose, create DIY cleaning solutions or clean from the ground using extension poles and brushes; each method has its own merits. The right choice depends on your specific situation.

The value of regular inspections cannot be overstated either. They help identify any issues that might compromise energy production before it becomes costly damage.

If climbing up to your roof isn’t appealing or safe for you, consider automatic cleaning systems or hiring professionals like us here at Impact Energy. We provide top-notch service in Denver and across greater Colorado – we take care of all aspects including installation to maintenance so you don’t have to worry about how often to clean panels on the roof yourself.

FAQs in Relation to How to Clean Solar Panels

What is the best thing to clean solar panels with?

For gentle yet effective cleaning of your solar panels, opt for soft brushes and a mild, non-abrasive soap solution. Always rinse the panels thoroughly after cleaning to remove any soap residue.

Can I clean solar panels myself?

Yes, you can certainly handle basic solar panel maintenance tasks yourself. Simply gather the necessary supplies, such as a soft brush, gentle detergent, and a garden hose, and follow these steps:

  • Safety first: Disconnect or shut down your solar panel system before cleaning to prevent electrical hazards.
  • Rinse thoroughly: Start by rinsing the panels with water to remove loose dirt and debris.
  • Clean gently: Use a soft brush and a mild soap solution to clean the panels, avoiding harsh scrubbing or abrasive materials that could scratch the surface.
  • Rinse again: Rinse the panels thoroughly with water to remove any soap residue.
  • Dry the panels: Use a squeegee or chamois to remove excess water and prevent water spots.

Can I use Dawn dish soap to clean my solar panels?

Yes, Dawn dish soap is generally considered safe for cleaning solar panels. Mix a small amount of Dawn with water to create a cleaning solution. Remember to rinse the panels thoroughly after cleaning to avoid leaving any soap residue.

Do you need to turn off solar panels before cleaning?

Yes, it is essential to disconnect or shut down your solar panel system before cleaning. Working with wet surfaces around electrical equipment poses safety risks. Disconnecting the system ensures that you are working in a safe environment.

Additional Tips

  • Choose a cool, cloudy day for cleaning to avoid water spots and potential damage from high temperatures.
  • Use a ladder or scaffolding to safely access your solar panels.
  • Wear gloves and protective eyewear to prevent injuries.
  • Inspect your panels regularly for signs of damage or debris buildup.

If you are unsure about cleaning your solar panels yourself or have concerns about potential damage, consider hiring a professional solar panel cleaning service.

How often should I clean my solar panels?

The frequency of solar panel cleaning depends on various factors, including your location, the environment, and the amount of debris accumulation. In general, it is recommended to clean your solar panels at least once or twice a year. However, if you live in an area with heavy dust, pollen, or bird droppings, you may need to clean your panels more frequently.

What are the signs that my solar panels need cleaning?

Visible dirt, debris, or stains on the surface of your solar panels are clear indicators that they need cleaning. Additionally, a noticeable decrease in your solar energy production can also be a sign that your panels need to be cleaned.

When should I consider hiring a professional solar panel cleaning service?

If you are uncomfortable cleaning your solar panels yourself, lack the necessary equipment, or have concerns about safety, hiring a professional solar panel cleaning service is a wise choice. Professional cleaners have the expertise and tools to clean your panels thoroughly and safely, ensuring optimal performance.

How much does professional solar panel cleaning cost?

The cost of professional solar panel cleaning varies depending on the size of your system, the location, and the complexity of the cleaning process. Typically, you can expect to pay between $50 and $200 per cleaning.

What should I avoid when cleaning my solar panels?

Harsh chemicals, abrasive scrubbers, and high-pressure water can damage your solar panels. Avoid using these substances or methods during cleaning.

What time of day is best for cleaning solar panels?

Early morning or late afternoon are ideal times for cleaning solar panels. Avoid cleaning during the hottest part of the day to prevent water spots and potential damage from high temperatures.

What safety precautions should I take when cleaning solar panels?

Always disconnect or shut down your solar panel system before cleaning. Use a ladder or scaffolding to safely access your panels. Wear gloves and protective eyewear to prevent injuries. Be cautious when working on wet surfaces near electrical equipment.