If your solar panels are set up on a flat roof and don’t require climbing to access them, cleaning is relatively simple. You can wash away most dirt using an average garden hose and some soap.
If localized soiling blocks parts of a panel, energy output may drop. A professional cleaner can use demineralized water to remove stubborn dirt buildup and restore energy production.
Safety
When a solar panel is dirty, it cannot absorb sunlight as effectively. This reduces the amount of energy it produces, and over time this can add up to significant losses. Solar panel cleaning services typically use cleaning solutions that are safe for panels, and they will never spray anything abrasive on the surface or otherwise risk damaging or unintentionally voiding the warranty. The cleaners will also know the best time of day to clean the panels to avoid any potential damage.
Professional solar panel cleaners work at heights and use proper safety equipment. This is crucial for panels on roofs. Sturdy ladders with ground support are essential. Harnesses and hard hats might be needed for greater heights. Though a hose rinse removes dirt, residue remains. To prevent damage, use a gentle brush or sponge. Cleaning during cooler morning or evening hours is advisable for panel longevity.
Solar panel soiling is a serious problem because it blocks sunlight from reaching all solar cell parts. This can cause the cells to overheat, and while modern solar panels have built-in bypass diodes that will mitigate this issue, it’s still important to keep them clean to ensure maximum performance.
Several solar installers offer routine cleaning in their performance guarantees or O&M agreements. This keeps your system well-maintained, saving you trouble and costs. Just make sure you read the fine print carefully, as not all manufacturers provide this service as standard.
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Efficiency
Cleaning your solar panels regularly can improve their overall energy production by up to 5%. This may not seem like a big deal, but it can add up. In fact, some of the largest solar farms in the world clean their modules constantly to keep energy production at maximum levels. They do this because they realize that even minute dips in electricity production can cost them a lot of money.
While it is true that regular rain should take care of most of the dirt buildup on your solar panels, it is not enough. Many pollutants can actually combine to form a slurry that can’t be rinsed away by rain or regular hose-downs. Even with a thorough rinse by a professional using non-toxic cleaners, monitoring your energy production after cleaning is important to ensure you are getting the full benefit of your investment.
It is also important to understand that your manufacturer’s warranty rarely covers solar panel cleaning. In fact, it is very often an add-on service that you will have to pay for out of pocket. Some installers include it in their operations and maintenance (O&M) agreements, but it is important to read the fine print to find out the specifics of your contract.
Luckily, cleaning your solar panels can cost much less than professional services. A basic approach involves using soapy water and a garden hose. Avoid high-pressure water or pressure washers to prevent surface damage. Opt for cooler times like dawn or dusk to prevent glass cracking due to sudden cold water on hot surfaces. Certain professionals use deionized water for cleaning, which lacks minerals to avoid streaks or residue on panels.
Reduced Risk of Damage
Professionals have tools to prevent damage and warranty issues. They use safe water pressure and soft brushes. Dirty panels reduce energy production and profitability over time. Regular cleaning maintains efficiency and full potential.
While some homeowners may attempt to clean their own solar panels, this can be a dangerous and complicated task if it’s done incorrectly. In addition to posing safety risks, using the wrong cleaning tools or products can cause permanent damage. It’s best to leave this task to the experts if you are unsure how to safely clean your panels.
Schedule solar panel cleaning at dawn or dusk to avoid heat absorption. Hot panels cause soapy water to evaporate and leave smears, hampering performance. Alternatively, several over-the-counter solar panel cleaning products are available to help you keep your panels clean and efficient. Such products eliminate manual washing, saving time and money. They feature coatings repelling dust, applied to panel surfaces for lasting protection.
When deciding how often to clean your solar panels, consider the type of climate you live in. For example, desert regions may require frequent cleaning due to the buildup of sand and dirt. Conversely, areas with heavy rain or snow might not need cleaning as frequently because natural rainfall better keeps your panels clean. You should also observe the panels’ energy output before and after cleaning and clean them more frequently if you notice a significant loss in power generation.
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Reduced Cost
Homeowners can clean solar panels a few times yearly using a garden hose or telescopic wand with a brush attachment. This DIY approach saves money but demands safety awareness and panel-friendly techniques.
A bit of vinegar mixed into the water may help dissolve stains that the hose can’t remove. A good scrub is the next step to make sure the panels are completely clean. Opt for a non-abrasive sponge to prevent scratches and water spots that reduce energy production. Conclude by rinsing with distilled or deionized water to prevent corrosion from minerals.
Cleaning your solar panels is relatively inexpensive and takes little time. However, if you don’t feel comfortable climbing on your roof or are worried about your ability to do so safely, hiring a professional is worth the small fee.
Many solar panel installation companies include cleaning as part of their performance guarantees and as an add-on service. Some have a dedicated team to handle maintenance and cleaning, while others will refer you to an outside outfit that specializes in these tasks. If you possess a solar O&M contract, the company should include regular cleaning, but it’s crucial to read the fine print as terms and conditions differ between companies.
If you’re a homeowner with a rooftop PV system, it’s vital to ensure the system is cleaned regularly to protect its performance and efficiency. Investing in a professional service can reduce risk, increase longevity and warranty protection, and improve overall energy output. This makes it an excellent investment for anyone looking to reap the benefits of solar power.
