Bird Droppings on Solar Panels: How They Reduce Efficiency and What to Do

Solar panels are an excellent investment for clean and renewable energy. However, they require proper maintenance to ensure optimal efficiency. One often-overlooked issue that can significantly impact their performance is bird droppings. Unlike dust or leaves, bird droppings create a stubborn layer that not only blocks sunlight but also causes long-term damage to your solar panels.

Homeowners and businesses using solar power need to take proactive steps to protect their panels. Investing in solar critter guard solutions and professional solar panel cleaning services can help keep bird droppings and other debris at bay. This article explores how bird droppings affect solar panel efficiency and the best solutions to mitigate the problem.

How Bird Droppings Reduce Solar Panel Efficiency?

Bird droppings on solar panels are more than just an eyesore—they can significantly hinder energy production and lead to long-term damage. Understanding their impact is crucial for maintaining the efficiency and lifespan of your solar investment.

1. Blocking Sunlight and Reducing Energy Output

Bird droppings create an opaque layer on the panel surface, blocking sunlight from reaching the photovoltaic (PV) cells. Unlike dust or leaves that might be blown away by the wind, bird droppings are sticky and thick, leading to more severe obstruction. Research from the National Renewable Energy Laboratory (NREL) indicates that dirty solar panels can experience a 15-25% drop in energy output, and bird droppings contribute significantly to this issue.

2. Hot Spot Formation and Panel Damage

When a portion of the solar panel is covered by bird droppings, it disrupts the flow of electricity. This leads to “hot spots,” where the affected areas overheat, potentially causing damage to the PV cells. Over time, repeated exposure to hot spots can degrade the efficiency and lifespan of your solar panels.

3. Corrosion and Long-Term Panel Deterioration

Bird droppings are acidic and can corrode the protective glass and metal frames of solar panels. Without timely cleaning, this can lead to permanent etching, reducing the panel’s efficiency and overall durability.

4. Attracting More Pests

Bird droppings indicate the presence of birds, which can attract other pests such as rodents and insects. Nesting materials and droppings can clog drainage systems, further increasing maintenance costs.

5. Increased Maintenance Costs

Allowing bird droppings to accumulate on solar panels leads to higher maintenance expenses over time. Regular cleaning and repairs become necessary to prevent lasting damage and ensure efficient energy production.

Effective Solutions to Prevent Bird Droppings on Solar Panels

Bird droppings on solar panels are a persistent problem, but fortunately, there are effective ways to prevent and manage them. By implementing the right protective measures, homeowners can ensure their solar panels remain clean, efficient, and long-lasting.

1. Install a Solar Critter Guard

One of the best ways to prevent birds from nesting under solar panels is by using a critter guard for solar panel systems. These guards create a physical barrier around the edges of your panels, preventing birds from perching or nesting beneath them.

• Critter guards are made from durable materials like galvanized steel or PVC-coated mesh, ensuring long-term protection.
• They are easy to install and do not interfere with the panel’s performance.
• By keeping birds away, critter guards also reduce the accumulation of droppings on the panels.

2. Schedule a Professional Solar Panel Cleaning Service

Bird droppings require specialized cleaning techniques to avoid damaging the panel’s surface. Hiring a solar panel cleaning service ensures thorough and safe removal of droppings without causing scratches or streaks.

• Professional cleaners use PURE water, either a reverse osmosis or deionized water system, and soft brushes to prevent scratching the glass.
• Regular cleaning maintains optimal energy production and extends the lifespan of your solar system.
• Cleaning services also inspect for any damage, allowing early intervention before issues worsen.

3. Use Pest Exclusion Methods for Solar Panels

Critter guards are the only effective long-term or permanent solution for keeping birds and pests away, however , other pest exclusion for solar panel strategies can help keep birds and pests away temporarily:

• Bird Spikes: Installing bird spikes in small areas or ledges can discourage birds from landing and roosting in those places, but should not be used to install around the edges of the panels.  Bird spikes do not work long-term for keeping birds from getting under your panels.
• Reflective Deterrents: Devices like reflective tape, owl decoys, rubber snakes or ultrasonic bird repellents will temporarily work to deter birds from approaching your solar installation, however, they will not work as a permanent solution. Most birds, and especially pigeons, have exceptional eyesight and notice the spinners and fake decoys are only moving in one way direction.  They also have a keen sense of smell and notice that those decoys are not emitting a smell.
• Gel Repellents: Special non-toxic gels create a sticky surface that birds dislike, discouraging them from landing on the roof. Most of these gels have reflective qualities that look like fire in the sun as well as emit a smell that birds, especially pigeons, dislike, further helping to deter them from your roof.  However, they do slowly lose their effectiveness over time and are not a long-term solution.

4. Trim Nearby Trees and Maintain Surroundings

Birds are more likely to nest on roofs with easy access to food and shelter. Trimming tree branches near solar panels can reduce perching spots and minimize the likelihood of birds nesting in the area.

5. Install Automatic Cleaning Systems

Some modern solar systems come equipped with self-cleaning technologies, such as water sprayers or robotic cleaners. These systems can help remove minor debris and reduce buildup over time, though they may not be sufficient for stubborn bird droppings.  Investing in a system like this is very expensive and not cost effective for most homeowners.

Why is Investing in Solar Maintenance Essential?

Ignoring bird droppings on your solar panels can lead to significant energy losses, costly repairs, and reduced system lifespan. Investing in solar panel service that includes regular cleaning and pest exclusion ensures maximum efficiency and long-term savings.

Benefits of Regular Solar Maintenance:

• Higher Energy Output: Keeping panels clean ensures you get the most out of your solar investment.
• Prevention of Damage: Avoid corrosion, hot spots, and structural issues caused by accumulated bird droppings.
• Lower Repair Costs: Addressing issues early reduces the need for expensive repairs or replacements.
• Improved Aesthetics: Clean panels enhance the appearance of your home and maintain property value.

Protect Your Solar Panels From Birds Effortlessly

Bird droppings may seem like a minor nuisance, but they can have a major impact on your solar panels’ performance and longevity. Installing a solar critter guard and scheduling a solar panel cleaning service are essential steps in maintaining your system’s efficiency and protecting your investment.

Don’t let bird droppings reduce your solar energy savings. Protect your solar panels with professional cleaning and pest exclusion solutions. Contact Wash Me Solar today for expert maintenance and installation services!