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How to Clean Solar Panels: Step by Step Guide

When you invest in solar panels, you’re not just purchasing energy-efficient equipment; you’re committing to a sustainable future. However, like any investment, it requires a bit of upkeep to ensure it continues to function at its best. Learning how to clean solar panels is a fundamental part of this maintenance. It’s a simple process that makes a significant difference in your solar panels’ performance.

How to Clean Solar Panels

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How to Clean Solar Panels at Home?

How to Clean Solar Panels
A homeowner’s approach to cleaning solar panels

Maintaining your solar panels is crucial for optimal energy production. Here’s a step-by-step guide on how to clean solar panels at home, ensuring safety and effectiveness.

Step 1: Assembling Cleaning Tools and Safety Gear

How to Clean Solar Panels
Gathering solar panel washing equipment for effective cleaning

Prepare for the cleaning process by collecting all necessary equipment. This should include a ladder, safety harness, gloves, soft bristle brush, garden hose, mild detergent, squeegee, and a soft cloth. Prioritising your safety with the correct gear is just as crucial as the cleaning itself.

Step 2: Safely Shutting Down the Solar Panel System

How to Clean Solar Panels
Ensuring safety by shutting down the solar panel system

Before any cleaning begins, ensure that the solar panel system is completely turned off. This is a critical safety step to prevent any electrical incidents. Consult the manufacturer’s manual for detailed shutdown procedures.

Step 3: Brushing Off Loose Debris

How to Clean Solar Panels
Using a soft brush for solar plate cleaning without scratching

Start the cleaning process by gently removing any loose debris from the surface of the panels. A soft bristle brush is ideal for this task, allowing you to clear away leaves, bird droppings, and dust without scratching the panels.
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Step 4: Rinsing the Panels with Water

How to Clean Solar Panels
Washing solar panels with water to remove the remaining dirt

Rinse the solar panels with a garden hose to wash off any remaining dust and dirt. The water pressure should be moderate to avoid any potential damage to the solar panels.

Step 5: Spot Cleaning with a Soft Brush

How to Clean Solar Panels
Spot cleaning solar panels to address persistent dirt areas

After rinsing, inspect the panels for any spots that didn’t come clean. Use a soft brush dipped in water to gently scrub these areas. The goal is to address any persistent dirt without using abrasive techniques.

Step 6: Applying Cleaning Solution to Tough Stains

How to Clean Solar Panels
Applying a gentle solar panel cleaning solution to stubborn stains

For areas with heavy soiling, a mild detergent mixed with water can be used. Apply the solution with a soft cloth or sponge, scrub gently, and then rinse thoroughly to ensure no soapy residue is left behind.

Step 7: Drying the Panels to Prevent Water Spots

How to Clean Solar Panels
Squeegeeing solar panels to prevent water spots after cleaning

Once the solar panels are clean, use a squeegee to remove excess water, followed by a soft cloth to dry any remaining moisture. This helps prevent water spots, which could potentially affect the panels’ ability to absorb sunlight efficiently.

Step 8: Reactivating the Solar Panel System

How to Clean Solar Panels
Reactivating the solar panel system following the maintenance routine

With the panels clean and dry, it’s time to reactivate your solar panel system. Carefully follow the startup procedures as outlined by the manufacturer or your installer. After the system is back on, monitor the solar output to assess the effectiveness of your cleaning efforts.

How Often Should You Clean Your Solar Panel?

How to Clean Solar Panels
Schedule routine cleaning sessions to ensure maximum efficiency.

Cleaning your solar panels is essential for maintaining their efficiency. The general consensus among solar companies and experts is to clean your solar panels at least twice a year​​​​​​​​. This frequency helps to prevent excessive build-up of dirt and debris, which can become more difficult to clean over time and potentially reduce the energy output of the panels by as much as 20%​​​​.
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However, the exact frequency can depend on your specific situation. If you live in an area where the panels get dirty quickly, perhaps due to dust, pollen, or leaves, you might need to clean them more often​​. It’s also advisable to monitor your monthly electricity bill or a monitoring app for any noticeable drop in production, which could signal that your panels need a clean​​.

When is the Best Time to Clean Solar Panels?

How to Clean Solar Panels
Optimal solar panel cleaning during cooler times to prevent damage and residue.

In India, the best time to clean solar panels is during the spring season, when the temperatures are not as high as in the summer, which can make the panels too hot to handle​​. Furthermore, the best time of day to conduct the cleaning is either early in the morning or late in the evening when the panels are cooler​​​​​​.

Cleaning during these cooler parts of the day is advised because when the sun is at its strongest, the panels might be too hot, and using water could result in quick evaporation, leaving mineral deposits behind​​. Additionally, during peak hours, cleaning could result in a loss of energy generation due to the panels being shaded or off during the cleaning process​​.
Read: How to Clean Kitchen Exhaust Fan Properly?

Automated Solar Panel Cleaning: Investing in the Future 

How to Clean Solar Panels
Advanced automated solar panel cleaning system in action

Automated solar panel cleaning systems are devices that use sensors and robotics to clean solar panels without human intervention. They are becoming increasingly popular as the cost of solar energy decreases and the need for clean energy increases. 

There are two main types of automated solar panel cleaners:
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  1. Self-cleaning systems: These systems use a series of low-pressure nozzles to spray water onto the panels, which then flows off and carries away dirt and debris. Some self-cleaning systems also use a cleaning agent to help remove stubborn contaminants. 
  2. Robotic systems: These systems use a mobile robot that travels along the rows of solar panels and cleans them with high-pressure water jets. Robotic systems can be more effective than self-cleaning systems at removing dirt and debris, but they are also more expensive.

Regardless of the type of system, automated solar panel cleaners typically use the following steps to clean solar panels:

  1. Detection: The system uses sensors to detect the cleanliness of the solar panels. This may involve measuring the amount of sunlight that is reflected off of the panels or using a camera to image the panels.
  2. Scheduling: The system schedules cleanings based on the detected level of dirt and debris. This ensures that the panels are cleaned regularly, but not so often that it wastes water or energy.
  3. Cleaning: The system dispenses water onto the panels and cleans them with a nozzle or a high-pressure jet. The cleaning agent may also be dispensed at this time.
  4. Rinsing: The system rinses the panels with clean water to remove any remaining dirt and debris.
  5. Drying: The system may use fans or heaters to dry the panels after they have been cleaned.

What NOT to do While Cleaning Solar Panels

How to Clean Solar Panels
Proper maintenance techniques being applied to preserve solar panel functionality.

Solar panels are a valuable investment that can help you save money on your energy bills. However, it’s important to clean them properly to ensure they continue to function efficiently. Here are some things you should NOT do when cleaning solar panels:

1. Don’t use harsh chemicals: Harsh chemicals like bleach, ammonia, or scouring powderscan damage the surface of solar panels, reducing their efficiency and lifespan. Stick to using mild dish soap or a specialized solar panel cleaner.

2. Don’t use abrasive materials: Abrasive sponges, brushes, or scouring pads can scratch the glass surface of solar panels, causing them to lose their effectiveness. Use a soft, lint-free cloth or a non-abrasive sponge instead.

3. Don’t use high-pressure water: The force of a pressure washer can damage the delicate wiring and seals inside solar panels. Instead, use a gentle stream of water from a hose or bucket.

4. Don’t clean them on hot days: Solar panels can get very hot when exposed to direct sunlight. Cleaning them on a hot day can cause the panels to crack or warp. Instead, clean them early in the morning or in the evening when they are cooler.

5. Don’t climb on or walk on solar panels: The weight of your body can damage the panels and their mounting system. If you need to reach the panels for cleaning, use a ladder with rubberized feet to prevent scratching the panels.

6. Don’t clean them during the rainy season: Rainwater can help to clean solar panels naturally, so there’s no need to clean them during the rainy season. In fact, cleaning them during heavy rain can be dangerous due to the risk of slipping on wet surfaces.

How Can NoBroker Help?

Maintaining the cleanliness of your solar panels is paramount to ensure they function at peak efficiency. While there are methods to undertake this task yourself, the risks and potential for inefficiency make it a less than optimal solution.

This is where the expertise of professional services becomes invaluable. Professionals, such as those from NoBroker Cleaning Services, are equipped with the necessary tools, knowledge, and safety protocols to execute this task with precision. Their services not only alleviate the burden of doing it yourself but also ensure that your solar panels are serviced with the utmost care, ultimately optimising their output and prolonging their lifespan.

Frequently Asked Questions

1. Why is it important to clean solar panels?

Solar panels in India can accumulate dust, bird droppings, and other debris due to the local climate and environment, which can significantly reduce their efficiency. Regular cleaning ensures that the panels operate at optimal efficiency, providing maximum energy output and a better return on investment.

2. How often should I clean my solar panels in India?

The frequency of cleaning solar panels in India depends on the location and environment. In dusty areas or places with high pollution, solar panels may require cleaning every few months. During the monsoon, the rain may naturally clean the panels, but a check-up is advisable afterwards to ensure no residue remains.

3. Can I clean solar panels by myself, or do I need professional help?

While it’s possible to clean solar panels by yourself using water and a soft brush, professional cleaning is recommended for safety reasons and to prevent any accidental damage to the panels. Professionals use specialised tools and have the expertise to thoroughly clean without causing any harm to the solar panel system.

4. What is the best time of day to clean solar panels in India?

The best time to clean solar panels in India is during the early morning or late evening when the sun is not at its peak. This prevents water from evaporating too quickly and leaving marks, and it’s also safer as the panels won’t be as hot.

5. Are there any specific cleaning solutions I should use for my solar panels?

Typically, solar panels can be cleaned with just clean water. If a cleaning solution is necessary, it is important to use mild, soapy water without any abrasive materials. Harsh chemicals should be avoided as they can damage the panel’s surface. Always check the manufacturer’s recommendations before applying any cleaning solution.

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srivalli susarla

Srivalli is a finance wizard with a refreshing voice in the often-stodgy world of personal finance and investment. An ardent admirer of literature, she brings a deep understanding of language and storytelling to her writing. Srivalli's Blogs on NoBroker brings a unique perspective to her writing on the Indian realty sector as a writer for the NoBroker Blog.

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