Solar panels are a smart and natural way to power homes because once you install them, they'll run automatically, harnessing the energy of sunlight. In a world where depleting sources of energy is a matter of concern, solar panels use renewable sources of energy, making it a popular choice amongst homeowners. However, it doesn't mean these panels are fff-free, even if you install them with perfect tilt to wash away dirt and debris. Regular cleaning is essential because, over time, dust, bird droppings, and snow affect the efficiency of the panels. In this article, we discuss "How to clean solar panels on the roof" in detail, so if you are looking for more input on this, you seem to have landed on the right page.
Why is It Essential to Clean Solar Panels?
There are several reasons to support the importance of cleaning. Solar panels are made up of photovoltaic cells that absorb the sun's rays, and when dust, debris, leaves, or snow blocks the cells, it lowers the efficiency of the cells by approximately 7% ( as per research done by the National Renewable Energy Laboratory). These hindrances occur more with horizontal panels as rainwater or debris don't get washed away. If there's a deciduous tree near the panels, it may attract birds and chances of leaves dropping may also increase, so ensure there are no such trees around.
The lifespan of solar panels also increases with regular cleaning because cleaner the panel, higher the operation. Also, the warranty is covered only when the panels are clean and then something goes wrong. When a panel's function is disrupted due to non-maintenance, you can't claim a warranty.
What is the Right Time to Clean Solar Panels?
There's no defined deadline to clean the panels. The right time is the time when you identify any dust or debris build up or any other problems that may arise due to the factors mentioned below.
The Location
The frequency of cleaning depends on the local weather conditions which rely on the location where you live. If there's enough rainfall in the location of stay, dust and debris will wash off with the rain water. If you stay in a dry area, you may have to clean the panels more often.
Landscaping
The solar panels require direct sunlight for better functioning. If there are trees near them, the chances of leaves, pollen, branches or any other debris may accumulate, raising the need for frequent cleaning.
Roof's Pitch
Roofs with proper tilt will automatically wash away the dirt and debris stored on the panels. However, roofs with low pitches won't wash away, resulting in regular cleaning.
Tips to Consider Before Cleaning the Panels
Safety Precautions
Safety is the primary and most important factor to consider when planning to clean solar panels because climbing on the roof requires safety precautions. A minor mistake may lead to a major accident. If you are not sure about DIY, hire a professional to do the job.
External Weather Conditions
Plan the cleaning considering the weather predictions. If the weather forecast is to rain on the day you've planned to clean, postpone it to a day with a normal climate. If the exterior temperature is too high, that's not the time to clean the panels.
Opt for an Eco-friendly Way of Cleaning
Select biodegradable soap or cleaning solution to protect the environment. If possible or as and when required, collect rainwater.
Things Not to Do
Never use a pressure water to clean as this can damage the solar panel's glass and don't spray cold water on the panels as panels might crack.
Method to Clean Solar Panels on the Roof
The method of cleaning varies depending on the situation, but there are usually two methods of cleaning: manual and professional.
Manual Cleaning
Manual cleaning is the simplest method that uses labour. First, gather all the tools and materials needed and proceed with cleaning. The steps are mentioned below:
Tools and Materials Required
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Extensions ladder
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Hose with spray attachment
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Soft, long-handled brush to ensure safety when cleaning from the ground
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A bucket
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Gloves
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Soap-free cleanser
Steps to Follow :
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Turn off the solar panel for your safety and the system's safety.
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Add mild detergent to a bucket of water.
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Climb the ladder wearing rubber-soled shoes for better grip and scrub the panel gently using a long-handled brush.
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Rinse the panel using the hose with a spray attachment.
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Apply a cleaning solution to a small part of the panel for a couple of minutes to cut through the dirt, but don't let it dry. Using a sponge, wipe the area where you applied the cleaning solution.
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Clean all the panels similarly.
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Finally, rinse all the panels with a sponge and dry them completely. Then turn on the solar panel power.
Professional Cleaning
If the home size is big and the panels too, then it calls for professional help. There could be other situations such as storms, annual thorough cleaning if you are staying in a polluted area, there's a deciduous tree around the panels or a sudden drop in efficiency when you should call an expert.
The Automated System of Cleaning
Apart from manual and professional methods, there is an automated cleaning system you can think of. There are three systems; Robotic, Sprinkler and Electrostatic cleaning. The robotic system helps in automated cleaning efficiently, but costs a lot of money initially. Electrostatic system removes dust from the panels using electrostatic force and the sprinkler system cleans the panels uniformly all over.
Price Range
The basic cost lies between $100-$300, however, it varies from region and the panel size.
Conclusion
Solar panels undoubtedly are a great way to generate power in an environmentally friendly manner, save energy bills, and protect the environment. All you need to consider are the safety precautions and the proper steps to clean them.
