Investing in solar panels is a significant decision, as they play a crucial role in energy efficiency and cost savings. Choosing high-quality panels ensures better performance, longevity, and a higher return on investment. But how do you determine if a solar panel is of good quality?
How to Check Solar Panel Quality from the Official Website
To avoid fake or low-quality panels, it’s important to verify your solar panel using the official source provided by the brand. Most manufacturers offer an online tool or contact method for checking authenticity. You’ll typically need the serial number printed on the back of the panel to complete the process. Below is a list of official websites and contact details for major solar panel brands.
Canadian Solar Panel
Canadian Solar panels can be verified through their official online tool. You just need the serial number printed on the panel’s label. This helps confirm the product is genuine and eligible for warranty.
Link: https://snquerycn.csisolar.com/indexEn.html
Jinko Solar Panel
Jinko Solar offers an online platform to confirm the authenticity of your panel. Simply enter the serial number from the panel to check if it’s original. The verification process is quick and easy to use.
Link: https://cs.jinkosolar.com/app/index.html#/customer-complaint/authenticity?lang=en_US
LONGi Solar Panel
LONGi Solar allows users to check panel authenticity via their website. Just input the serial number printed on the back of your module. For local support in Pakistan, you can also email them directly.
Link: https://www.longi.com/en/modules-authenticity/
Email: LONGicare.pakistan@longi.com
JA Solar Panel
JA Solar has a dedicated product verification page. Use the serial number or product code to verify authenticity. This ensures you are using a certified original product.
Link: https://product.jasolar.com/en.html
Astronergy Solar Panel
Astronergy provides an official tool to verify their solar modules. Just locate the serial number on your panel and enter it online. You’ll receive confirmation if the panel is authentic.
Link: https://www.astronergy.com/module-authenticity/
Trina Solar Panel
Trina Solar panels can be verified through both their website and mobile app. Simply input your panel’s serial number to confirm its authenticity. Both options are user-friendly and reliable.
Web Link: https://customerservice.trinasolar.com/#/moduleQuery/index
App Link: https://apps.apple.com/us/app/voice-of-customer/id1124386873
Sunova Solar Panel
Sunova Solar does not currently have an online verification tool. However, users in Pakistan can send their panel details via email. The support team will assist with manual verification.
Email: Pakistan@sunova-solar.com
Huasun Solar Panel
Huasun Solar panels can be verified through their official verification webpage. Enter the serial number from the panel to check its authenticity. It’s a simple and secure process.
Link: https://www.huasunsolar.com/query.html
Yingli Solar Panel
Yingli Solar provides an online tool for checking the originality of their panels. Just visit the website and enter the serial number printed on the panel. You’ll get instant verification status.
Link: https://ylnyph.yinglicloud.com/pclogin/query
Here are some key factors to consider when checking the quality of solar panels:
- Steps to Testing a Solar Panel With Multimeter
- Efficiency rating
- Build quality aCnd durability
- Type of solar cells used
- Performance in different weather conditions
- Manufacturer warranty and certifications
- Temperature coefficient and degradation rate
Understanding these factors will help you make an informed decision and choose the best solar panels for your needs.
1.Steps to Testing a Solar Panel With Multimeter
Using a multimeter to test a solar panel ensures it is producing the expected voltage and current. This simple test helps diagnose performance issues and verify the panel’s condition during solar panel installation.
Steps to Follow:
- Set the Multimeter: Switch your multimeter to the DC voltage setting.
- Measure Open Circuit Voltage (Voc): Connect the multimeter probes to the positive and negative terminals of the solar panel and compare with the manufacturer’s specified Voc.
- Measure Short Circuit Current (Isc): Switch the multimeter to the current (Amps) setting, then connect it directly to the panel terminals to check Isc.
- Measure Operating Voltage and Current: Connect the panel to a load and measure the voltage and current under real operating conditions.
These steps will help verify the panel’s performance and ensure it is working efficiently.
2. Efficiency Rating
Solar panel efficiency refers to how well a panel converts sunlight into usable electricity. Higher efficiency means more power generation per square meter. Choosing an efficient panel helps maximize energy output and reduce installation space requirements.
How to Check Efficiency
- Look for efficiency ratings on the product specification sheet.
- Standard panels have efficiency levels between 15% to 22%.
- Higher efficiency panels may cost more but deliver better long-term results.
3. Build Quality and Durability
High-quality solar panels are built with robust materials to withstand environmental conditions. Poor build quality can lead to early failures, affecting performance and return on investment.
Key Indicators of Good Build Quality
- Frame Material: High-quality panels use anodized aluminum frames.
- Glass Cover: Tempered glass provides better protection against harsh weather.
- Backsheet and Encapsulation: Durable backsheet and EVA encapsulation enhance panel longevity.
- Junction Box Quality: A well-sealed, IP67 or IP68-rated junction box prevents moisture and dust from damaging internal connections, ensuring long-term reliability in both Hybrid and On-Grid Solar Systems.
How to Inspect
- Examine the panel for any visible cracks, scratches, or defects.
- Ensure the panel has a strong frame that resists corrosion and physical damage.
- Look for IP67 or IP68-rated junction boxes for better efficiency during winter and dust resistance.
4. Type of Solar Cells Used
The type of solar cells used in a panel affects its efficiency, performance, and lifespan. Different types of cells are available, each with its own advantages and disadvantages.
Different Types of Solar Cells
- Monocrystalline – High efficiency, long lifespan, and excellent performance.
- Polycrystalline – Lower efficiency but cost-effective and widely used.
- Thin-film – Flexible and lightweight but less efficient.
How to Choose
- For residential and commercial use, monocrystalline panels are the best choice.
- Polycrystalline panels are budget-friendly but take up more space.
- Thin-film panels are ideal for portable and off-grid applications.
5. Performance in Different Weather Conditions
Solar panels should be able to perform well in various weather conditions, including cloudy, rainy, and high-temperature environments. Regular Solar Panel Cleaning helps maintain efficiency, as panels with poor weather resistance will underperform and degrade faster.
Factors Affecting Performance
- Low-light performance: Some panels work better in cloudy or low-light conditions.
- Heat resistance: High temperatures can reduce panel efficiency.
- Snow and hail resistance: Some panels are designed to withstand harsh weather.
How to Check
- Look at the panel’s temperature coefficient (lower is better).
- Check if the panel has an anti-reflective coating for better low-light absorption.
- Research real-world performance reviews from users in similar climates.
6. Manufacturer Warranty and Certifications
A strong warranty and industry certifications ensure that the panels meet high-quality standards. Reputable manufacturers offer warranties that cover both product defects and performance degradation.
Importance of Warranty
- A good warranty indicates confidence in the product’s durability.
- Look for at least 25 years of performance warranty.
- Check for a 10-12 year product warranty against manufacturing defects.
Key Certifications to Look For
- IEC 61215: Ensures reliability and performance testing.
- IEC 61730: Safety certification.
- UL 1703: Certification for electrical safety.
7. Temperature Coefficient and Degradation Rate
Solar panels degrade over time, meaning they produce less electricity as they age. The temperature coefficient determines how much the panel’s output decreases as the temperature rises.
What is Temperature Coefficient?
- It shows how much power output decreases as the temperature rises.
- A lower temperature coefficient (-0.3%/°C to -0.5%/°C) is better.
Understanding Degradation Rate
- Over time, solar panels lose efficiency.
- High-quality panels degrade at a rate of 0.3% to 0.5% per year, while low-quality panels degrade faster.
- Check the performance warranty to see the expected degradation rate over 25 years.
8. Testing and Certification Reports
Independent testing and certifications provide assurance that solar panels meet industry standards. Reputable manufacturers provide test reports that validate their claims.
Why Are Testing Reports Important?
- Third-party testing ensures panels meet industry standards.
- Independent lab results give unbiased data on performance.
Where to Find These Reports
- Manufacturer websites often publish performance reports.
- Request detailed certification documents from the supplier.
9. Customer Reviews and Brand Reputation
Before purchasing solar panels, it is essential to research the reputation of the manufacturer. Customer feedback provides insights into real-world performance, durability, and after-sales support.
How to Check Reputation
- Look at online reviews on platforms like Google, Trustpilot, or solar forums.
- Research the manufacturer’s history and experience in the industry.
- Compare ratings with competitors to make an informed choice.
Red Flags to Avoid
- Companies with no customer feedback or history.
- Extremely cheap panels with little to no warranty.
- Frequent complaints about failure or poor after-sales support.
10. Cost vs. Quality Balance
While high-quality solar panels may cost more upfront, they provide better efficiency, durability, and savings in the long run. It’s important to balance cost with quality when making a purchase.
Is Expensive Always Better?
- Higher-priced panels often come with better efficiency and durability.
- Balance cost with performance to get the best value for your money.
How to Choose Wisely
- Compare different brands within your budget.
- Factor in installation costs, warranty, and efficiency.
- Avoid extremely low-cost panels that may compromise quality.
For more details on solar costs, check out the cost breakdown of a 20kW solar system.
Conclusion
Checking the quality of solar panels is essential to ensure long-term efficiency, reliability, and return on investment. By considering factors like efficiency, build quality, certifications, and customer reviews, you can make an informed decision when purchasing solar panels. Always choose a reputable manufacturer and verify certifications before making a final decision. Investing in high-quality panels will maximize your energy savings and ensure durability for years to come.