What to watch out for before buying a solar system
In a world where climate change and pollution are major challenges, the transition to green energy is becoming increasingly necessary. One of the most accessible and effective ways to contribute to a cleaner environment is using solar panels. Choosing a quality solar system can be a challenge, however, given the variety of products on the market. In this article, we look at the important certifications and technical specifications you should check when buying a solar panel system.
Important certifications for solar panels and inverters
To ensure the quality and performance of a solar system, it is essential that it holds certain internationally recognised certifications. Here are the most important ones:
- IEC 61215: certifies the long-term performance and reliability of solar panels, which undergo rigorous testing to verify their resistance in various environmental conditions.
- IEC 61730: certifies the operational safety of solar panels, ensuring they are safe to use.
- IEC 62109: the safety standard for solar inverters, ensuring they operate safely and efficiently.
- ISO 9001: certifies that the manufacturer follows a quality management system.
- ISO 14001: certifies that the manufacturer follows an environmental management system, underlining its commitment to protecting the environment.
Advanced technologies in solar panels
Beyond the essential certifications, the technologies used in manufacturing solar panels play a crucial role in determining their performance and durability.
N-type technology
- Superior efficiency: N-type panels have a solar conversion efficiency of up to 22–23%, ensuring high electricity output.
- Longer service life: N-type panels have an annual degradation rate of around 0.3%, meaning they retain their performance for longer.
- Performance at high temperatures: N-type panels maintain high efficiency even at high temperatures, thanks to a lower temperature coefficient (-0.32%/°C). This is crucial in warm climates, where high temperatures are frequent and can affect panel performance.
- Resistance to light-induced degradation (LID): performance losses are reduced with this type of panel, usually below 1% in the first years of use, ensuring steady energy output.
Key specifications when buying a solar system
To make the best choice, here are some essential specifications to look for in solar panels:
- Panel efficiency: look for panels with an efficiency of at least 20–21% to maximise energy production.
- Rated power (Watt-Peak): make sure the panels' rated power suits the energy needs of your home or business.
- Warranty: opt for panels with a 25-year performance warranty and a 12–15 year product warranty.
- Temperature coefficient: a lower temperature coefficient indicates better performance in heat.
- Shade tolerance: choose solar systems that include optimisation technologies to minimise energy losses caused by shade.
Conclusion
Choosing a solar system comes down not only to price but also to the quality and performance of the panels and inverters. Make sure the panels and inverters you buy are certified and use advanced technologies. That way, you will benefit from a durable, efficient system that helps protect the environment and delivers significant long-term savings.
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