How to Maintain Solar Panels

Joe Brennan
Jul 24, 2023

Solar panels are an excellent investment for homeowners, offering cost savings, a reduced carbon footprint, and long-term energy efficiency. However, proper maintenance is crucial to maximising the value and productivity of your solar panels.

While solar panels require minimal upkeep compared to other home systems, neglecting their maintenance can lead to decreased performance and potentially void your warranty.

This comprehensive guide will walk you through everything you need to know about maintaining your solar panels, including frequency, cost, monitoring, and best practises.

Why is Solar Panel Maintenance Important?

Solar panels are designed to be durable and reliable, with minimal moving parts. However, they are exposed to the elements year-round, which can accumulate dirt, debris, and other contaminants. These external factors can reduce the efficiency of your solar panels, limiting their energy production capacity. Regular maintenance ensures that your panels remain clean, unobstructed, and in optimal working condition, maximising their performance and longevity.

Creating a Maintenance Checklist

To stay organised and ensure that all necessary maintenance tasks are completed, it's helpful to create a maintenance checklist. This checklist should include regular cleaning, inspections, and additional manufacturer-recommended guidelines for your panels. Following a checklist, you can track your maintenance activities and identify potential issues early on.

Consider hiring a professional solar panel installer who may offer a maintenance plan. These plans often include yearly inspections and cleanings, providing peace of mind and expert care for your solar panels. If a maintenance plan is not available, consult your installer for a recommended checklist or create your own based on the guidelines provided in this article.

Monitoring Solar Panel Performance

Monitoring the performance of your solar panels is essential for identifying any deviations in energy production. While it's natural for panels to experience a gradual decline in efficiency over time, significant underperformance may indicate the need for maintenance or cleaning. Some solar companies provide mobile apps that allow you to track the energy production of each panel in real time. These apps can alert you to any unusual drops in performance, enabling you to take prompt action.

Cleaning Your Solar Panels

Regular cleaning is the primary maintenance task for solar panels. As mentioned earlier, dirt, debris, and other contaminants can accumulate on the surface, hindering sunlight absorption and reducing energy production. Cleaning your panels at least twice a year is recommended, regardless of the weather conditions or location.

Cleaning Method

You can simply use a hose or bucket of water to clean your solar panels to spray off any dirt or debris. A non-abrasive sponge or microfiber cloth can be used for stubborn stains or heavy soiling. Avoid harsh cleaning agents or soap, as these can leave streaks and damage the panels. Lukewarm water is sufficient for most cleaning needs.

Safety Precautions

When cleaning your solar panels, it's essential to prioritise safety. If your panels are installed on the roof, consider hiring a cleaning professional to prevent accidents. If you choose to clean them yourself, take the necessary precautions, such as using a safety harness or working from a ladder cautiously. Additionally, avoid cleaning your solar panels on a sunny day, as the water can quickly evaporate, leaving streaks.

Additional Tips

  • Ensure your solar panels are turned off before cleaning to prevent electrical hazards.
  • If you live in an area prone to heavy snowfall, gently remove any accumulated snow from the panels using a soft brush or broom. Avoid hot water, as the sudden temperature change can cause the panels to crack.
  • Regularly inspect the seal around the panel seams, especially if your panels are split into two pieces. Ensure that no cracks or damage could compromise their efficiency.

Inspecting Your Solar Panels

In addition to regular cleaning, periodic inspections are crucial for identifying potential issues or damage to your solar panels. Inspections should be conducted at least once a year, and hiring a solar specialist or installer for a professional assessment is recommended. However, you can also perform a visual inspection to check for any visible signs of damage or wear.

What to Look for During Inspections

During inspections, pay attention to the following:

  • Debris and Obstructions: Check for any accumulated debris, such as leaves, twigs, or bird droppings, that may obstruct sunlight absorption. Remove any obstructions carefully without scratching or damaging the panels.
  • Cracks or Damage: Inspect the surface of the panels for any cracks, chips, or broken cells. These can impact the efficiency and performance of your solar panels and should be addressed promptly.
  • Seal Integrity: If your panels have seams, inspect the seal around the seams to ensure that it is intact and free from any signs of degradation or damage.
  • Wiring and Connections: Examine the electrical wiring and connections to ensure they are secure and free from fraying or damage. If you notice any issues, it's best to contact a professional electrician for assistance.

Tightening Bolts and Screws

Over time, temperature changes and vibrations can cause the bolts and screws securing your solar panels to loosen. Loose fasteners not only affect the aesthetics but can also compromise the stability and performance of your panels. Regularly check and tighten any loose bolts and screws using a torque wrench if necessary as part of your maintenance routine. This simple step helps ensure your panels remain securely fastened and aligned for optimal energy production.

If your solar panels are ground-mounted, pay attention to their stability. If they show movement or instability when pushed or rocked, take measures to increase their stability. This can include adding stakes or weights, such as water barrels, to the base of the mounting structure.

Inspecting Your Roof

Solar panels are typically installed on your roof, making it essential to include roof inspections in your solar panel maintenance. Your roof is crucial in protecting your home and solar panels from the elements. Regular inspections enable you to identify any potential issues that may affect the integrity or performance of your panels.

During roof inspections, look for signs of water leakage into the junction box or around the solar panels. If you detect any leaks, address them promptly to prevent further damage. Turning off the solar power system during roof inspections is recommended to avoid potential electrical hazards.

Frequency of Solar Panel Maintenance

The frequency of solar panel maintenance depends on various factors, including location, climate, and environmental conditions. As a general guideline, cleaning your panels at least twice a year is recommended. However, certain circumstances, such as areas with heavy rainfall or storm seasons, may require more frequent cleaning.

It's important to refer to the manufacturer's guidelines for your specific panels to determine the ideal maintenance frequency. The manual should recommend cleaning intervals, inspections, and any other maintenance practises specific to your panels.

The Cost of Solar Panel Maintenance

The cost of maintaining solar panels is typically low compared to the savings they provide. However, it's important to consider any associated costs when calculating the overall return on investment. The primary cost considerations for solar panel maintenance are inspections and professional cleanings.

An annual maintenance inspection, which is not typically included in the initial installation cost, can range from $150 to $300 per visit. This cost may vary depending on your location and the complexity of your solar panel system. Additionally, if you hire professionals for cleaning, the cost can be relatively affordable, especially considering the potential long-term benefits.

Some solar panel companies offer mobile apps or monitoring systems for tracking usage and performance. While these may come with a small fee, they can provide valuable insights and help optimise your solar panel system's efficiency.

Solar Panel Warranties

Solar panel warranties provide assurance and protection for your investment. Understanding the different types of warranties and what they cover is important to making an informed decision when selecting your solar panels. Warranties typically include manufacturer warranties and installer warranties.

Manufacturer warranties cover defects in materials, workmanship, and essential components of your solar panels, such as inverters and batteries. These warranties generally last 10 to 25 years, depending on the manufacturer. However, reviewing the warranty terms and conditions is crucial to understanding what is covered and any specific maintenance requirements.

On the other hand, installer warranties cover any damage or defects resulting from the installation process. These warranties ensure that your solar panels are installed correctly and comply with industry standards. The length and coverage of installer warranties may vary, so it's essential to review the terms and conditions provided by your installer.

 So, this is the way How to maintain solar panels. To maintain the validity of your warranties, it's important to adhere to the recommended maintenance practises outlined by the manufacturer. Failure to maintain your solar panels properly may result in the warranty being voided.


Maintaining your solar panels is essential for optimising their performance and longevity. Regular cleaning, inspections, and adhering to the manufacturer's guidelines ensure your panels operate efficiently. By following the maintenance practises outlined in this guide, you can enjoy the benefits of sustainable energy while maximising your savings. Remember to consult the manufacturer's guidelines and consider professional assistance when needed. With proper maintenance, your solar panels will continue to generate clean, renewable energy for years.

For reliable solar panel installation and maintenance services in Dublin, Leinster, and surrounding areas such as Cavan, Carlow, Kilkenny, Longford, and Offaly, contact Going Solar. Our team of experts is dedicated to delivering the best solar PV solutions for both residential and commercial locations. Visit our website to learn more or schedule a consultation.

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Frequently Asked Questions

How often should I clean my solar panels?

It's recommended to clean your solar panels at least twice a year, but the frequency may vary depending on your location and environmental conditions. Consult the manufacturer's guidelines for specific recommendations.

Can I clean my solar panels myself?

Yes, you can clean your solar panels yourself. However, ensure that you follow safety precautions and use appropriate cleaning methods to avoid damaging the panels.

Can I walk on my solar panels?

Walking on solar panels is generally not recommended, as it can cause damage. Refer to the manufacturer's guidelines to determine whether walking on the panels is permissible for your specific model.

What should I do if I notice a significant drop in solar panel performance?

If you observe a significant decline in performance, it's advisable to contact a solar specialist or installer for a professional assessment. They can identify and address any underlying issues affecting your panels' efficiency.

Can I use cleaning agents or soap to clean my solar panels?

No, it's best to avoid using cleaning agents or soap, as they can leave streaks and potentially damage the protective coating on the panels. Lukewarm water and a non-abrasive sponge or cloth are sufficient for most cleaning needs.

How long do solar panels typically last?

Solar panels are designed to have a lifespan of approximately 25 to 30 years. Regular maintenance and adherence to the manufacturer's guidelines can help ensure their longevity.

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*FYI, parts of this blog post were drafted by artificial technlogy. But rest assured, it's been thoroughly researched, edited, reviewed and me & my team.
Author Fahad Zahid
Founder @ Going Solar

Joe Brennan, the founder of Going Solar, is dedicated to making solar power mainstream in Ireland and meet SEAI objectives. With a focus on affordability and sustainability, he is bringing renewable energy solutions to homes, reducing costs & environmental impact.