The Hidden Cost of Solar Panels in Australia
As energy prices continue to rise, more than 4.3 million Australians have turned to solar panels as a way to reduce their electricity bills. However, the investment required for a basic system—ranging from $5,000 to $10,000—means that households expect these panels to last at least 20 years. Unfortunately, new research suggests that this expectation may not be realistic, especially for those living in certain regions.
The issue stems from ultraviolet (UV) radiation, which is known to cause skin cancer and is prevalent in Australia due to the country’s intense sunlight. Recent studies by the University of NSW have revealed that UV radiation is also damaging solar panels, causing them to degrade faster than expected.
Dr Shukla Poddar, the author of the study, explained that some panels are failing seven to 10 years earlier than anticipated. “We might be getting five per cent more energy, but it’s also reducing the longevity of the module because UV is harmful,” she said. Her findings highlight a growing concern: the harsh Australian environment is affecting solar panels more than manufacturers predict during lab testing.
Regional Differences in Panel Degradation
The 2024 research found that solar panels in cities like Sydney, Brisbane, and Perth are degrading faster than those in more temperate areas such as Melbourne, Hobart, and Adelaide. Factors like moisture, heat, and sunlight contribute to this accelerated degradation.
The problem is particularly pronounced in arid regions like Alice Springs, where the combination of high UV exposure and extreme temperatures is taking a toll on solar technology. This issue isn’t limited to Australia; it affects areas such as Sub-Saharan Africa, parts of China, India, the southern United States, and the Atacama Desert in northern Chile.
With climate change worsening in these regions, the problem is expected to become even more severe. To address this, Dr Poddar suggests that solar panels need to be redesigned to better withstand harsh environmental conditions. This includes testing them in arid and semi-arid environments rather than relying solely on standard lab conditions.
New Technologies and Solutions
Over the past seven years, the rollout of advanced solar technologies such as Heterojunction (HJT) and TOPCon modules—also known as N-Type panels—has introduced new challenges. These newer models, which promise up to 35 per cent greater efficiency, are also susceptible to UV damage. Dr Poddar predicts that these issues will persist with future models unless improvements are made.
In the short term, some solar farms in harsh environments have started experimenting with UV blockers to reduce exposure. However, more research is needed to determine whether these solutions affect other types of light or interfere with panel performance.
Another potential solution is the use of better tracking systems. Dr Poddar believes that adjusting these systems to steer panels away from the sun during peak hours could help prolong their lifespan. She noted that single-axis tracking systems, which follow the sun, expose panels to higher levels of UV radiation compared to fixed-position systems.
The Path Forward
Dr Poddar emphasized the need for improvement in the next five to 10 years. “There’s a lot of scope for improvement, and we just want to make sure we’re in a better place,” she said. Her research, published in the IEEE Journal of Photovoltaics, highlights the importance of adapting solar technology to meet the unique challenges of Australia’s environment.
Looking Ahead
As the demand for renewable energy continues to grow, addressing these challenges will be crucial for ensuring the long-term viability of solar power in Australia. While the current issues with UV damage are concerning, they also present an opportunity for innovation and improvement in solar technology.
By redesigning panels to better withstand harsh conditions and implementing smarter tracking systems, the industry can work towards providing more durable and efficient solar solutions. This will not only benefit Australian households but also contribute to global efforts in combating climate change through sustainable energy practices.
