Solar Panel Maintenance and Cleaning Tips

Solar Panel Maintenance

Last updated 05/29/2024

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Solar panel maintenance can lead to long-term panel performance and electricity production, helping you save money on energy bills and maximize your investment.
Clean solar panels at least twice a year to remove dirt, dust, pollen, and other debris.
While you can clean your own solar panels, hire a professional if you have limited roof access or electrical concerns.

Importance of solar panel maintenance

Solar panels are expensive, but regular maintenance can support your system’s longevity and efficiency, making your investment worthwhile. Solar panel maintenance is relatively hassle-free compared to other household maintenance tasks, such as cleaning gutters. Two main solar maintenance factors include condition and performance.

Condition: Remove any dirt buildup, debris, snow, or other obstructions on your solar panels.
Performance: Regularly check on the performance of your system. If you notice unusually low production, you may have an issue or need an inspection.

Regular inspection of solar panels

You can hire a professional or ask your solar company to inspect your system. Regular solar panel inspections involve a comprehensive check of your system’s components and performance. They also include searching for physical damage and corrosion, electrical wire checks, and reviewing performance data for any issues. While you can clean panels of dirt or obstructions and visually check for damages, a professional should check the wiring to ensure no loose connections or safety concerns exist.

Checking for dirt and debris

Since solar panels are typically installed on your rooftop or outside, they can collect dirt, dust, and other debris on the surface. Keeping your solar panels clear ensures maximum sunlight absorption and optimal production performance. You can clean solar panels by spraying them with water to loosen dirt and debris and using a soft brush to scrub the surface. Avoid using pressure washers because they can damage the panels — use gentle materials and low-pressure water to avoid scratching the panels.

Depending on location, you may need to clean your panels more frequently. For example, if you live in an area with significant dust and pollen, more frequent cleaning is needed to maintain solar panel performance.

Inspecting for damage

Extreme weather, like high winds and heavy rain or snow, can damage your solar panels and reduce efficiency. If you notice lower performance following a storm, it could be a sign your solar panels are damaged. A regular inspection by a solar professional can identify and recommend repairs to ensure your solar panels work properly. Although most reputable solar panel companies have at least a 25-year warranty on panels, they typically don’t cover damage from extreme weather. Check with your homeowner’s insurance company to determine if your coverage includes solar panel insurance.

You should also read the fine print of your solar system agreement, as some may have a maintenance requirement. This means the company may not cover repairs under the warranty if you don’t regularly maintain and clean solar panels.

Cleaning solar panels

Many solar companies recommend cleaning your panels at least twice a year. Regular cleaning prevents the buildup of dirt and debris. The longer you wait to clean your panels, the more buildup there may be. Consider keeping a record of cleanings to stay informed and organized.

When to clean solar panels

The best time to clean your solar panels may vary by location, weather patterns, and environmental factors. For example, if you live in a dry area of Texas or California, you may need to clean more frequently due to dust. If you clean twice a year, you can plan based on the seasonal weather in your area. Consider cleaning in the spring to remove dirt or pollen and prepare for the summer sun, and again in the fall to clear any buildup before winter when sunlight is less available. This seasonal cleaning strategy helps maintain efficiency and ensure maximum production during peak sunlight.

How to clean solar panels

Solar panel cleaning is simple and you likely already have the equipment at home. Avoid using any harsh chemicals or tools that could damage your solar panels. Prioritize your safety when cleaning rooftop solar panels and consider hiring a professional for extensive cleaning needs. Follow these steps to clean your solar panels:

Begin by rinsing your panels with water to remove or loosen dirt and debris.
Use a soft brush or cloth to scrub the panels with a gentle soap and remove remaining stains or dust.
Rinse the panels with water and let them dry.

Professional solar panel maintenance and repairs

Whether or not you hire a professional depends on the tasks required and your level of expertise. While you can perform basic tasks like simple cleaning, hire a professional for comprehensive cleaning, complex electrical issues, or repairs. Review your solar contract or contact your solar company to determine what type of maintenance and repairs may be covered by the warranty.

When to hire professionals

While do-it-yourself repairs may save money upfront, professional services provide peace of mind that the job will be completed correctly, safely, and in line with industry standards. Here’s when you should hire a professional for solar panel maintenance:

Electrical issues: If you experience electrical problems like malfunctioning inverters or wiring issues, hire a licensed electrician or solar technician to repair the issue safely.
Warranty maintenance: If your panels are under warranty, your solar company may require professional maintenance to comply with warranty details.
Limited roof access: If your solar panels are installed on a roof with steep inclines or limited access, hire a professional with the necessary equipment and expertise to complete the project.
System upgrade or expansion: If you plan to upgrade, expand, or add solar batteries to your current system, consult a professional to ensure the project is executed smoothly with best practices for safety and care.
Performance decline: If you notice a decrease in energy production or efficiency of your solar panels, a professional can identify and repair any issues.

Monitoring solar panel performance

Monitoring the performance of your solar panels ensures they operate properly and generate the expected amount of energy. Stay updated on your solar panel performance to understand your system’s typical production levels and home energy consumption patterns. With this knowledge, you can adjust your usage habits and save money on energy bills while ensuring your system has no production issues.

How to monitor solar panel performance

Many solar companies, like SunPower and Tesla Solar, offer monitoring software or an online portal as part of the system to help track performance. The software provides real-time insights into data trends and may provide production or usage alerts.

If your solar panel system is not equipped with a monitoring tool, reputable companies like Enphase Energy offer a third-party tool you can add to your system. Alternatively, you can monitor it manually by checking energy production readings from the inverter display or smart meter. Manual monitoring effectively provides basic information, but an automated monitoring system is more convenient and provides valuable insights.

Identifying performance issues

If you notice any of the following when monitoring your solar panels, you may have a performance issue.

A sudden decrease in production
Inverter error messages
Some solar panels perform better than others
Low production during sunny seasons

Delaying performance concerns could extend the time it takes to experience a return on your investment. Review your solar panel system’s documents or contact your solar company for assistance.

Seasonal solar panel maintenance tips

Optimize your solar panel maintenance routine based on the seasons in your area. The following includes seasonal solar maintenance tips to maximize solar production year-round.

Winter: Snow and ice buildup is more likely in colder climates. Remove snow or ice from panels to ensure optimal energy production.
Spring: Inspect your panels after winter to check for any signs of damage. Clean panels of dirt and debris. Remove any tree limbs or other obstructions covering your panels.
Summer: Solar panels experience peak energy production during the summer due to longer daylight hours and increased direct sunlight. If you notice a decrease in production, consider cleaning your panels or hiring a professional to inspect your system.
Fall: Inspect for damage from any summer storms and clean off fallen leaves or debris before winter.

Solar panel maintenance FAQs

When should solar panels be cleaned? Clean solar panels regularly to maintain optimal performance. Solar companies recommend cleaning at least twice a year in the spring and fall to remove dirt, dust, pollen, and other debris on your panels. Cleaning once per season ensures panels are well-prepared for each season’s conditions.
What are the best methods for cleaning solar panels? Use water, gentle soap, and a soft brush or cloth to effectively clean your solar panels. Avoid using harsh chemicals or equipment that may damage your solar panels.
What are the common performance issues in solar panels? Common performance issues include buildup of dirt and debris, inverter or wiring problems, and impacts from environmental factors. Regular maintenance and inspections prevent common performance issues impacting the lifespan of your solar panel system.
How often should you perform system checks on your solar panels? Consider a comprehensive professional inspection every 1–2 years. However, you should visually inspect panels on a regular basis for signs of damage, shading, and debris buildup.