Solar panels are a fantastic way to save on energy bills while helping the environment. However, regular maintenance is key to keeping them running efficiently. One often overlooked aspect of maintenance is cleaning the panels. You might be surprised to know that dust, grime, bird droppings, and other debris can significantly reduce the energy output of your solar panels over time. So, what’s the best way to clean solar panels? Let’s discuss the most effective strategies.

Best Way to Clean Solar Panels for Peak Performance

Below is a detailed explanation of the best way to clean solar panels, focusing on safety, efficiency, and eco-friendliness:

1.) Safety First

Before you start cleaning your solar panels, safety should be your top priority. Here are a few important steps to follow:

• Turn off the solar panel system: Before any cleaning begins, switch off the solar power system. This helps prevent electrical issues or accidents.
• Use proper equipment: If you need to climb onto your roof, use a sturdy ladder and, if necessary, safety harnesses. Be cautious on sloped or wet surfaces.
• Avoid cleaning when panels are hot: Solar panels can get extremely hot during the day. Clean them early in the morning or late in the evening when the panels are cooler, reducing the risk of damage or injury.

2.) The Right Tools for Cleaning

You don’t need any fancy or expensive tools to clean solar panels effectively. The basics include:

• Soft cloth, sponge, or brush: A non-abrasive brush or soft sponge will ensure you don’t scratch the surface of the panels. Avoid using anything rough or sharp.
• Garden hose: A hose with low-pressure water is sufficient to rinse the panels. High-pressure water (like from a pressure washer) can damage the glass or the wiring underneath.
• Mild, biodegradable soap: If your panels are especially dirty, you can use a gentle soap. Make sure the soap is biodegradable and environmentally friendly to avoid harming your plants or polluting water sources.

3.) Step-by-Step Cleaning Process

Step 1: Inspect the Solar Panels

Before you start cleaning, inspect the panels for any cracks, loose wiring, or damage. If you spot any issues, it’s best to contact a professional to repair them before cleaning.

Step 2: Rinse the Panels with Water

Use a garden hose to rinse the panels with clean, low-pressure water. This will help remove most of the loose dust, dirt, and debris. Make sure the water temperature is close to the temperature of the panels to avoid sudden cooling or heating, which can cause damage.

Step 3: Scrub Gently with a Soft Brush or Sponge

For more stubborn dirt like bird droppings, you’ll need to scrub the panels gently. Use a soft brush or sponge along with a bucket of water mixed with mild soap. Scrub in circular motions, ensuring you cover the entire surface of the panel. Be gentle to avoid scratching or damaging the panel surface.

Step 4: Rinse Again

After scrubbing, rinse the panels again with water to remove any soap residue. Leaving soap on the panels can create a film that attracts more dirt over time, reducing the effectiveness of the cleaning.

Step 5: Let the Panels Dry Naturally

Once you’ve rinsed the panels, there’s no need to dry them manually. Let the panels dry naturally in the sun. However, if you want to avoid water spots, you can use a squeegee to remove excess water, especially if you live in a hard-water area where mineral spots might form.

4.) What to Avoid When Cleaning Solar Panels

• No Pressure Washers: High-pressure washers can damage the panel’s glass and even dislodge the seals around the edges, which can lead to water infiltration and damage to the internal wiring.
• No Abrasive Cleaning Tools: Stay away from scrub brushes with hard bristles, steel wool, or any other abrasive cleaning tools. These can scratch the glass and reduce the efficiency of your panels by creating tiny cracks that diffuse the light.
• Avoid Harsh Chemicals: Stick to water and mild soap. Strong chemicals like ammonia or bleach can wear down the protective coatings on the panels, reducing their lifespan.

5.) Eco-Friendly Cleaning Solutions

You can use collected rainwater to clean your solar panels if you’re environmentally conscious. Not only does this save water, but it also reduces the risk of mineral deposits that can form if you use tap water with a high mineral content.

Additionally, some companies offer eco-friendly cleaning solutions specifically formulated for solar panels. These biodegradable cleaners are safe for your plants, soil, and water sources.

How Often Should You Clean Solar Panels?

How frequently you should clean your solar panels depends on several factors. If you live in a dusty area or near construction sites, you’ll need to clean them more often. Rain may help rinse away some dirt, but it won’t completely clean your panels, especially if you live in areas prone to dust storms or pollen accumulation. Industry experts recommend inspecting and cleaning your panels once or twice a year to ensure optimal performance.

Signs That Your Solar Panels Need Cleaning

1.) Decline in Energy Output

One of the most noticeable signs that your solar panels need cleaning is a decrease in energy production. If you observe a significant drop in the energy your system is generating compared to previous months (while weather conditions remain similar), it could be due to dirt or debris on the panels blocking sunlight.

2.) Visible Dirt, Dust, or Debris

If you can visibly see layers of dust, bird droppings, leaves, or other debris on your panels, it’s a clear sign they need cleaning. Even a thin layer of dust can reduce the panels’ efficiency by preventing sunlight from hitting the solar cells properly.

3.) Accumulation of Bird Droppings

Bird droppings are more problematic than dust because they are often sticky and harder to wash off. If you notice large patches of droppings, especially if they’ve been there for a while, it’s time for a thorough cleaning. Bird droppings can significantly impact energy output by shading parts of the panel.

4.) Streaks or Water Spots

After rain or cleaning, water spots or streaks can form on the panels, especially if you live in an area with hard water. These streaks leave behind mineral deposits that reduce the panels’ effectiveness over time. If you notice these streaks, they should be cleaned off with soft water or deionized water to avoid further buildup.

5.) Pollen Buildup

In areas with a lot of trees or plants, pollen can accumulate on your solar panels, especially during the spring season. Pollen creates a fine, powdery layer on the panel’s surface that can be difficult to notice but still impacts energy production. If your panels look dull or have a yellowish tint, they may have a pollen buildup that needs to be cleaned.

6.) Regular Monitoring Alerts

Many solar systems come with monitoring systems that alert you when there’s a drop in performance. If your system has this feature and you’re receiving alerts about lower energy generation, it’s worth inspecting the panels for dirt, dust, or any other debris.

Best Time of Day to Clean Solar Panels

It’s best to clean your solar panels either early in the morning or late in the evening. During these times, the panels are cooler, reducing the risk of cracking the glass or accidentally damaging the equipment due to temperature fluctuations. Avoid cleaning in the middle of the day when the panels are hottest, as sudden temperature changes from water can be harmful.

What to Avoid When Cleaning Solar Panels

1.) Avoid Using High-Pressure Washers

While it might seem efficient to blast away dirt with a high-pressure washer, this can cause significant damage to your solar panels. The intense pressure can crack the glass, damage seals, and even dislodge wiring. Instead, use a regular garden hose with low pressure to rinse the panels. High-pressure water can also push water under the edges of the panels, leading to electrical issues or corrosion over time.

2.) Avoid Abrasive Tools and Cleaning Agents

Never use abrasive brushes, steel wool, or harsh cleaning agents like bleach or ammonia to clean your solar panels. These materials can scratch or wear down the protective coating on the surface of the panels, leading to reduced efficiency and even permanent damage. Instead, use a soft cloth, sponge, or a non-abrasive brush along with mild, biodegradable soap if needed.

3.) Avoid Cleaning in Direct Sunlight or When Panels are Hot

Cleaning solar panels in the middle of the day when they are hot from the sun can lead to thermal shock, which can cause the glass to crack. Additionally, the water or cleaning solution may evaporate quickly, leaving behind streaks or spots. It’s best to clean the panels early in the morning or late in the evening when they’re cooler, ensuring a safer and more effective cleaning process.

FAQs

1.) How often should I clean my solar panels?

The frequency of cleaning depends on your environment. If you live in a dusty area, near construction, or under trees where bird droppings are common, you may need to clean your solar panels every 2-4 months. In areas with regular rain or less pollution, cleaning once or twice a year might suffice. Monitoring your system’s energy output can help you decide when cleaning is necessary. If you see a noticeable drop in performance, it might be time for a clean.

2.) Can I clean my solar panels myself, or should I hire a professional?

Yes, you can clean your solar panels yourself if they are easily accessible and you follow the correct safety precautions. However, if the panels are on a steep roof or you’re uncomfortable with heights, it’s safer to hire a professional. Professionals have specialized tools and knowledge to clean the panels without causing damage and can also inspect for any issues that might need repair.

3.) What tools and materials should I use to clean my solar panels?

To clean solar panels, you don’t need anything fancy. A soft cloth, sponge, or non-abrasive brush is ideal for scrubbing the panels. Use a garden hose with low-pressure water to rinse them off. If there’s stubborn dirt or bird droppings, mix a bucket of water with a mild, biodegradable soap. Avoid using harsh chemicals, pressure washers, or abrasive materials, as they can damage the panels.

4.) Does cleaning my solar panels improve their efficiency?

Yes, cleaning your solar panels can significantly improve their efficiency. Dirt, dust, pollen, and bird droppings can block sunlight from reaching the solar cells, reducing the amount of energy the panels produce. Regular cleaning helps ensure that your panels are receiving maximum sunlight, which boosts energy production and saves you more on your energy bills.

5.) Can I clean my solar panels with tap water?

You can clean your solar panels with tap water, but in areas with hard water, mineral deposits may form on the panels and reduce their efficiency over time. To prevent this, use soft or deionized water for cleaning, which leaves no residue. If you must use tap water, consider rinsing the panels thoroughly to minimize spotting or streaking.

6.) Is it safe to use a pressure washer to clean solar panels?

No, it is not safe to use a pressure washer on solar panels. The high pressure can crack the glass, damage the protective seals, and potentially dislodge wiring, leading to costly repairs. Stick to a garden hose with low-pressure water for rinsing and a soft brush for scrubbing. If you need a deeper cleaning, it’s best to hire a professional who knows how to handle the panels safely.

Contact Cre8 Zero

Are you ready to make a positive impact on the environment while reducing your energy costs? Our team specializes in Solar Panels & Inverters, Battery Storage, and EV Chargers, offering tailored solutions for homes and businesses in Brighton & Hove. Whether you’re looking to harness solar power, store excess energy, or switch to electric vehicles, we have the expertise to guide you every step of the way. Contact us today to schedule a consultation and discover how we can transform your energy usage for a brighter, more sustainable future.