6 WARNING SIGNS YOUR SOLAR PANELS ARE FAILING

28 March, 2025.

Solar panels are a highly efficient and sustainable energy solution, built to provide reliable performance for decades. With advancements in materials and design, most panels are expected to operate effectively for 25 years or more when maintained properly.

However, external factors and wear can gradually reduce their efficiency. Identifying key indicators of declining performance is essential to keep your energy system running optimally.

1. DECREASED PERFORMANCE AND OUTPUT

A decline in energy production is often the first sign that your solar panels may not be functioning optimally. Regularly compare your system’s output with the manufacturer’s specifications. This can be done using your system’s integrated monitoring software or a multimeter for manual checks.

Conduct these assessments during peak sunlight hours on clear days for the most accurate results.

On average, solar panels experience a degradation rate of 0.5% per year. By their 20th year, most panels should still operate at approximately 90% of their original efficiency.

While this gradual decline is normal, significant underperformance may indicate issues such as environmental wear, improper installation, or manufacturing defects.

Factors Affecting Efficiency Loss

• Excessive shading can lead to reduced efficiency
• Debris accumulation may worsen performance over time
• Exposure to extreme weather conditions such as hail or strong winds can intensify efficiency loss
• Hidden damage from weather events can decrease performance without clear visual indicators

To ensure consistent energy production, it’s crucial to monitor your system regularly and schedule periodic inspections by certified technicians. Early detection of performance issues allows for timely intervention, preventing further energy loss and ensuring your system operates efficiently for its intended lifespan.

2. PHYSICAL DAMAGE OR DEGRADATION

Physical damage is a common issue that affects solar panels over time. Cracks, chips, or scratches on the surface can compromise the panel’s protective glass layer, allowing moisture and debris to infiltrate and damage internal components.

This leads to reduced energy output and accelerates degradation.

Australia’s unpredictable weather, including hailstorms, strong winds, and extreme heat, poses risks to solar panels. Regular inspections after severe weather events are essential to identify and address potential damage.

While minor scratches or chips can sometimes be repaired, significant damage often necessitates replacement.

Using high-quality, durable panels designed for harsh conditions can reduce the risk of damage. Panels with tempered glass and reinforced frames are better suited for long-term reliability.

3. EXPIRED LIFESPAN AND COMPATIBILITY ISSUES

Most solar panels have a functional lifespan of 20 to 30 years. Beyond this, their ability to convert sunlight into electricity diminishes significantly. Additionally, older panels may not be compatible with modern inverters, mounting systems, or energy storage solutions.

As technology advances, newer panels offer improved efficiency, higher wattage, and better compatibility with smart energy management systems. Upgrading to modern panels ensures your solar system continues to meet your household or business energy needs.

If your energy consumption has increased or your current system relies on outdated technology, replacing old panels with newer models is a cost-effective and future-proof solution.

4. DISCOLOURATION AND BURN MARKS

Discolouration and burn marks are visible signs of panel degradation. Yellowing, browning, or dark streaks often result from prolonged exposure to ultraviolet radiation or the use of low-quality materials during manufacturing. These defects disrupt heat distribution and reduce the panel’s efficiency.

Burn marks near conductive strips are usually caused by overheating and may indicate underlying electrical issues. Such problems can pose safety risks if not addressed promptly. Regular visual inspections can help identify these signs early.

If discolouration or burn marks are found, consult a certified technician to evaluate the damage and determine whether replacement is necessary.

5. MICROFRACTURES AND STRUCTURAL WEAKNESSES

Microfractures are tiny cracks that form in photovoltaic cells due to temperature fluctuations, hail, or improper handling during installation. These cracks are often microscopic and not immediately visible but can disrupt the flow of electricity, leading to reduced energy production over time.

Studies indicate that microfractures can lower panel efficiency by measurable percentages annually, depending on their size and location. Over time, they may lead to hot spots that accelerate further degradation. Regular professional inspections, including electroluminescence (EL) imaging, can detect these hidden issues early.

Replacing panels with significant microfractures is necessary to maintain consistent energy output and prevent ongoing performance losses. Ensuring proper handling during installation and maintenance can minimise the occurrence of microcracks, extending the lifespan of your solar panels.

6. COUNTERFEIT OR SUBSTANDARD PANELS

Counterfeit or substandard panels present significant challenges, as they often fail to meet industry standards for efficiency and durability. These panels may degrade faster, offer poor energy absorption, and have shorter lifespans compared to certified products.

The Clean Energy Regulator in Australia advises consumers to verify that their panels are accredited and meet local standards. Accredited panels undergo rigorous testing to ensure they can withstand Australia’s diverse climate conditions.

If your system contains counterfeit or substandard components, replacing them with high-quality, certified alternatives ensures better performance and long-term reliability.

ADDITIONAL CONSIDERATIONS FOR SOLAR PANEL REPLACEMENT

Upgrading to Advanced Technologies

Replacing ageing panels provides an opportunity to adopt the latest advancements in solar technology. Modern panels are designed for higher efficiency, better low-light performance, and greater resilience to environmental stressors. These upgrades can significantly lower energy costs while enhancing system reliability.

Recycling and Sustainability

Proper disposal of old panels is crucial for environmental responsibility. Recycling programs in Australia, such as those supported by PV Industries, recover valuable materials like silicon, glass, and metals, reducing waste and supporting the creation of new panels.

Partnering with certified recycling facilities ensures eco-friendly disposal practices.

Routine Professional Inspections

Scheduling inspections with Clean Energy Council-accredited solar technicians is key to maintaining a high-performing system. These professionals can detect potential issues early, recommend timely repairs or replacements, and optimise your system’s efficiency.

Regular check-ups also help plan for upgrades proactively, ensuring uninterrupted energy production.

PRACTICAL ADVICE FOR LONG-TERM PERFORMANCE

Maintaining your solar panels’ efficiency requires proactive care and timely action. If you observe signs of reduced output, visible damage, or incompatibility with newer components, consulting a certified solar expert is essential. Upgrading panels at the appropriate time can maximise energy production and support sustainable energy use.

Regular maintenance, adherence to best practices, and investing in quality components are the cornerstones of a durable solar energy system. Staying informed and addressing issues promptly helps you enjoy consistent, cost-effective renewable energy for years to come.

Working with dependable service providers guarantees your system is inspected, maintained, and upgraded as required. Investing in top-quality components and expert support ensures long-lasting, cost-effective renewable energy.

Conclusion

Solar panels are a long-term investment in clean energy, but like any technology, they can experience issues over time. By recognizing these six warnings - you can take quick action to prevent further deterioration and costly repairs.

Regular maintenance, professional inspections, and prompt troubleshooting are key to ensuring your solar system operates at peak efficiency for years to come. If you notice any of these signs, don’t ignore them, contact a trusted solar technician to diagnose and resolve the problem. A well-maintained solar system not only saves you money but also maximizes your environmental impact.

Stay vigilant, stay informed, and keep your solar panels performing at their best!

Reach Out to SunSelect at 1300 867 353 for Expert Guidance and Money-Saving Options.
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