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Jordan Bennett wrote about "solar panel degradation" (Wednesday, December 20, 2023)

Solar Panel Degradation: Understanding the Long-Term Performance of Solar Panels

Solar Panel Degradation: Understanding the Long-Term Performance of Solar Panels

Solar panels are a popular and environmentally-friendly choice for generating electricity. They harness the power of sunlight and convert it into usable energy, offering numerous benefits such as reduced electricity bills and reduced carbon emissions. However, like any other technology, solar panels undergo degradation over time. Understanding this process is crucial for evaluating the long-term performance and efficiency of solar panels.

What is Solar Panel Degradation?

Solar panel degradation refers to the gradual decline in the performance and efficiency of solar panels over their lifespan. This degradation is influenced by various factors, including the quality of the solar cells, environmental conditions, and maintenance practices.

Causes of Solar Panel Degradation

Several factors contribute to solar panel degradation:

  1. Light-induced degradation (LID): LID occurs in the first few hours of solar panel usage and results in initial power loss. However, this decrease stabilizes after a short period.
  2. Temperature-induced degradation: Solar panels produce less electricity as temperatures rise above the standard operating conditions. Overheating can cause damage to the panels, reducing their efficiency.
  3. Material degradation: Over time, the materials within solar panels may deteriorate due to exposure to UV radiation, extreme weather conditions, and humidity. This can lead to a decline in performance.
  4. Soiling and shading: Accumulation of dust, dirt, or debris on the surface of solar panels can obstruct sunlight absorption, reducing efficiency. Similarly, shading caused by nearby objects, such as trees or buildings, can significantly impact performance.

Efficiency Loss and Mitigation Measures

The rate of solar panel degradation varies depending on multiple factors, but as a general guideline, most panels experience an efficiency loss of around 0.5% to 1% per year.

However, solar panel manufacturers are continuously improving their technology to minimize degradation effects. Here are a few mitigation measures:

  • High-quality materials: Choosing solar panels made with high-quality materials and advanced manufacturing processes can help reduce degradation rates.
  • Regular maintenance: Proper cleaning and maintenance of solar panels, especially removing dirt and debris, can prevent further efficiency loss.
  • Efficiency monitoring: Regular monitoring of the panels' output and performance allows for early detection of any issues, enabling prompt maintenance or replacement.
  • Panel placement: Ensuring solar panels are installed in locations with minimal shading and optimal sunlight exposure can significantly impact long-term efficiency.


Solar panel degradation is an inevitable process that affects the performance and efficiency of solar panels over time. However, with the right quality materials, regular maintenance, and proper placement, the rate of degradation can be minimized, ensuring stable and efficient electricity production for many years. Solar energy remains a sound investment, providing both economic and environmental benefits.

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