> Quick answer: IEC 61215 certification confirms that a polycrystalline panel meets basic electrical and mechanical safety standards, including wet leakage currents and insulation resistance [1][7]. However, it does not guarantee performance under Romanian hail or thermal cycling as the standard may not fully reflect real-world climate-specific stresses.
Introduction
IEC 61215 certification is a globally recognized benchmark for solar panel safety and performance. But how well do these standards hold up when faced with the unique weather conditions of Romania? This article delves into whether IEC 61215-certified polycrystalline panels can withstand Romanian hail and thermal cycling, exploring both what the certification entails and its limitations.
What Does IEC 61215 Certification Prove?
IEC 61215 certification confirms that a polycrystalline solar panel has undergone standardized electrical and mechanical testing to verify its safety, performance, and basic durability under controlled laboratory conditions [1][7]. It includes tests for wet leakage currents and insulation resistance, ensuring the panel can operate safely in various environments. The standard is referenced by global testing bodies like TÜV Rheinland and UL Solutions as part of their certification processes [24][16].
Hail Resistance
IEC 61215 requires panels to withstand a 25 mm hailstone impact, which corresponds to approximately 10 Joules of kinetic energy [19]. However, this standard may not be sufficient for regions prone to severe hailstorms. The Renewable Energy Test Center (RETC) has developed more rigorous tests that exceed IEC standards, simulating hail impacts up to 20 Joules or higher [8][9]. For instance, top performers like JA Solar and JinkoSolar have withstood far more intense impacts equivalent to a 45 mm iceball traveling at 30.7 m/s (68.7 mph) [8][9].
Thermal Cycling
The IEC 61215 thermal cycle test subjects panels to repeated temperature changes, typically between −40°C and +85°C, over defined cycles to simulate daily and seasonal temperature variations [17]. However, this standard may not fully capture long-term performance in extreme climates. Additional tests like the Hot Desert Test Cycle (HDTC) have been proposed for desert regions experiencing more severe thermal stress [13][14].
Other Durability Factors
IEC 61215 does not address all durability factors such as UV resistance, humidity ingress, and mechanical load from snow or wind. For example, AESOLAR’s carport modules were tested against DIN ISO 12543-4, which involves more severe conditions like 100°C for 16 hours, 100% RH at 50°C for two weeks, and 2,000 hours of UV exposure [2]. These tests go beyond IEC requirements to ensure real-world resilience.
Real-World Performance
Even panels certified under IEC 61215 may underperform in the field. A 2016 CEC testing program found that some panels met minimum requirements but delivered 4.4% below their rated power output [20]. This indicates that compliance with IEC standards does not guarantee actual performance or longevity.
Comparison Table: Advanced Testing vs. IEC 61215
| Test Type | IEC 61215 | Advanced Tests |
|–––––––|––––––––-|–––––––––-|
| Hail Impact | ≤ 25 mm (10 Joules) [19]| ≥ 45 mm (20+ Joules) [8][9]|
| Thermal Cycling | −40°C to +85°C | HDTC for desert regions |
| UV and Humidity | Basic damp heat test | 1,000 hours UV exposure [25]|
Key Takeaways
- IEC 61215 certification confirms basic safety and performance under laboratory conditions but does not guarantee durability in specific climates.
- Advanced tests like those by RETC exceed IEC standards to simulate severe weather events.
- Real-world performance may vary, highlighting the need for additional testing beyond IEC requirements.
Frequently Asked Questions
[
{
„q”: „Does IEC 61215 cover all types of solar panels?”,
„a”: „Yes, IEC 61215 is applicable to both monocrystalline and polycrystalline panels [7].”
},
{
„q”: „What additional tests do top manufacturers perform?”,
„a”: „Top manufacturers like AESOLAR conduct rigorous testing beyond IEC standards, including DIN ISO 12543-4, which involves 100°C for 16 hours and 1,000 hours of UV exposure [2].”
},
{
„q”: „How does hail resistance vary in real-world conditions?”,
„a”: „Top performers like JA Solar have withstood impacts equivalent to a 45 mm iceball traveling at 30.7 m/s (68.7 mph), far exceeding the IEC requirement of 25 mm [8][9].”
}
]
References
- [1] How_long_do_rooftop_residential_solar_panels_last_-_pv_magazine_Global__7bebb092 — authority
source passage
air can flow beneath and cool the equipment. Light-colored materials can be used in panel construction to limit heat absorption. And components like inverters and combiners, whose performance is particularly sensitive to heat, should be located in shaded areas, suggested CED Greentech. The same goes for snow, which can cover panels during heavier storms, limiting output. Snow can also cause a dynamic mechanical load, degrading the panels. Typically, snow will slide off of panels, as they are slick and run warm, but in some cases a homeowner may decide to clear the snow off the panels. This must be done carefully, as scratching the glass surface of the panel would make a negative impact on output. Degradation is a normal, unavoidable part of a panel’s life. Proper installation, careful snow clearing, and careful panel cleaning can help with output, but ultimately, a solar panel is a technology with no moving parts, requiring very little maintenance. Setting standards To ensure a given panel is likely to live a long life and operate as planned, it must undergo standards testing for certification. Panels are subject to the International Electrotechnical Commission (IEC) testing, which apply to both mono- and polycrystalline panels. EnergySage said panels that achieve IEC 61215 standard are tested for electrical characteristics like wet leakage currents, and insulation resistance. They under go a mechanical load test for both wind and snow, and climate tests that check for weakne
- [2] AESOLARs_Building_Material-Grade_Solar_Carport_Modules__50d6f56b — magazine
source passage
compromises the PV module’s durability and increases the risk of overhead installation hazards. The in-house enhanced stress test (9x more than IEC) reveals high durability of POE encapsulant compared to EVA under high UV radiations. Mr. Hanifi also noted the potential risk of humidity ingression inside module lamination under the presence of UV and temperature, resulting in corrosion, delamination, and discoloration. Recognizing the limitations of conventional IEC standards in ensuring the long-term durability and reliability of carport PV modules, as well as addressing overhead safety concerns, the company adopted testing protocols aligned with building-grade material standards. In collaboration with TU Darmstadt, AESOLAR validated the HORIZON series carport module’s resilience against UV, humidity, and temperature in compliance with the DIN ISO 12543-4 standard. According to this standard, which outlines durability testing for laminated and safety glass in building applications, the PV module and a counterpart 30 mm framed laminate without PV cells were subjected to a rigorous test sequence. This included a high-temperature test at 100°C for 16 hours, a two-week humidity test with 100% RH condensation at 50°C, and a 2,000-hour UV radiation test. The modules showed no significant defects, such as bubbles, delamination, or cloudiness, confirming the durability of the polymer stack. The company also reported peel test values averaging 91.26 N/cm – exceeding the required 79 N/
- [7] How_long_do_residential_solar_panels_last_pv_magazine_International__a1e59f16 — authority
source passage
in the panels, lowering output. Some racking solutions are optimized for high-wind areas, protecting the panels from strong uplift forces and limiting microcracking. Typically, the manufacturer’s datasheet will provide information on the max winds the panel is able to withstand. The same goes for snow, which can cover panels during heavier storms, limiting output. Snow can also cause a dynamic mechanical load, degrading the panels. Typically, snow will slide off of panels, as they are slick and run warm, but in some cases a homeowner may decide to clear the snow off the panels. This must be done carefully, as scratching the glass surface of the panel would make a negative impact on output. (Read: “Tips for keeping your rooftop solar system humming over the long term“) Degradation is a normal, unavoidable part of a panel’s life. Proper installation, careful snow clearing, and careful panel cleaning can help with output, but ultimately, a solar panel is a technology with no moving parts, requiring very little maintenance. Standards To ensure a given panel is likely to live a long life and operate as planned, it must undergo standards testing for certification. Panels are subject to the International Electrotechnical Commission (IEC) testing, which applies to both mono- and polycrystalline panels. EnergySage said panels that achieve IEC 61215 standard are tested for electrical characteristics like wet leakage currents, and insulation resistance. They undergo a mechanical load te
- [8] Top_solar_panel_brands_in_performance_reliability_and_quality__c4cf4d2f — magazine
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# Top solar panel brands in performance, reliability, and quality – pv magazine Global Source: Blog/Web URL: https://www.pv-magazine.com/2023/08/01/top-solar-panel-brands-in-performance-reliability-and-quality/ Author: Ryan Kennedy Date: 2023-08-01 The Renewable Energy Test Center (RETC) released its 2023 PV Module Index report, evaluating the reliability, quality, and performance of solar panels. Solar modules are put through a variety of accelerated stress tests to evaluate these parameters. Through comparative test results, project stakeholders can select products best suited for a particular environment, location, or portfolio. Quality Hail durability Top performers: JA Solar, JinkoSolar, Trina Solar RETC’s hail durability test takes UL and IEC standards testing a step further, exposing solar modules to higher kinetic impact to reflect the risk posed by hail over a 25 or 30-year operating life. In addition to ballistic impact testing, RETC runs thermal cycle and hot-spot tests to reveal potential long-term module degradation. The top eight performers in this category withstood an effective kinetic energy of 20 Joules or more. These modules effectively demonstrated resistance to a 45 mm (1.8 in.) iceball traveling at a terminal velocity of 30.7 m/s (68.7 mph). Thresher Test Top performers: Astronergy, JA Solar Longi Solar, Runergy The thresher test is a summation of a series of tests that places modules under a variety of vigorous environmental stresses to provide quantita
- [9] Top_solar_panel_brands_in_performance_reliability_-_pv_magazine_Global__c4cf4d2f — authority
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# Top solar panel brands in performance, reliability, and quality – pv magazine Global Source: Blog/Web URL: https://www.pv-magazine.com/2023/08/01/top-solar-panel-brands-in-performance-reliability-and-quality/ Author: Ryan Kennedy Date: 2023-08-01 The Renewable Energy Test Center (RETC) released its 2023 PV Module Index report, evaluating the reliability, quality, and performance of solar panels. Solar modules are put through a variety of accelerated stress tests to evaluate these parameters. Through comparative test results, project stakeholders can select products best suited for a particular environment, location, or portfolio. Quality Hail durability Top performers: JA Solar, JinkoSolar, Trina Solar RETC’s hail durability test takes UL and IEC standards testing a step further, exposing solar modules to higher kinetic impact to reflect the risk posed by hail over a 25 or 30-year operating life. In addition to ballistic impact testing, RETC runs thermal cycle and hot-spot tests to reveal potential long-term module degradation. The top eight performers in this category withstood an effective kinetic energy of 20 Joules or more. These modules effectively demonstrated resistance to a 45 mm (1.8 in.) iceball traveling at a terminal velocity of 30.7 m/s (68.7 mph). Thresher Test Top performers: Astronergy, JA Solar Longi Solar, Runergy The thresher test is a summation of a series of tests that places modules under a variety of vigorous environmental stresses to provide quantita
- [13] Towards_a_new_desert_testing_standard_for_PV_modules_-_PV_Tech__aa02df34 — magazine
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PV modules. The hydrolysis-degradation mode contribution is quite minor in desert locations due to low air humidity. Solder bonds and fingers corrode more slowly and have a longer lifespan in the desert than in tropical regions. Hot desert testing standards Accelerated ageing test standards are used for assessing the degradation modes and predicting the long-term performance of PV modules. Accurately forecasting module lifetimes based on degradation modes and the interaction between BOMs and climatic conditions are of significant interest. However, the existing IEC 61215 and IEC 61730 standards primarily focus on design and safety qualification tests for PV modules under moderate climate conditions. The drawbacks of current standards include: • Single-stress chambers cannot replicate multi-degradation modes. • Standard tests do not encompass the evaluation of multiple environmental stressors, new BOMs and new climate-specific failure modes. • Combined Accelerated Stress Testing (C-AST) and Module Accelerated Sequential Testing (MAST) take several months and are expensive. • IEC TS 63126:2020 specifies a single-stress approach for qualifying PV modules, components and materials for high-temperature operation. As discussed in the previous section, desert PV modules often experience defects such as premature encapsulant discolouration, significant thermomechanical damage and glass abrasion. However, the current IEC 61215 testing standards fail to adequately account for the incre
- [14] Towards_a_new_desert_testing_standard_for_PV_modules_-_PV_Tech__aa02df34 — magazine
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further research into climate-specific standards and PV module designs for desert applications. Conclusions The growing rate of installation of PV modules in desert climates raises concerns about bankability and reliability due to the harsh environmental conditions. Performance loss and degradation in deserts differ significantly from moderate climates, with common failure modes including encapsulant discolouration, interconnect breakages, backsheet cracks, chalking and glass abrasion (ARC removal). However, current IEC 61215 testing standards do not adequately address these issues. To promote reliable PV module performance in desert conditions, a new qualification test cycle, the “Hot Desert Test Cycle (HDTC)”, should be developed. HDTC would involve multiple tests targeting problems such as encapsulant discolouration, backsheet cracks/delamination, thermal fatigue, mechanical stability and glass abrasion caused by desert conditions. To mitigate degradation and failure rates in deserts, PV modules should incorporate desert-resistant glazing materials, advanced high-performance solar cells with robust metallisation, durable encapsulants, and reliable backsheet materials. These recommendations serve as a foundation for further research into desert-specific testing standards and PV module designs. References [1] Adothu, B. et al., 2024, “Comprehensive review on performance, reliability, and roadmap of c-Si PV modules in desert climates: A proposal for improved testing standard”
- [16] Solar_Materials_and_Components_Certification_-_UL_Solutions__3c04e7e8 — authority
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# Solar Materials and Components Certification Source: Blog/Web URL: https://www.ul.com/services/solar-materials-and-components-certification Author: Date: 2026-01-01 Polymeric materials and PV module certification Polymeric materials are essential to the fabrication of PV modules and used in critical components such as substrates, encapsulants, back sheets and adhesives. Safety compliance with established standards minimizes risk of failure and helps ensure safe operation, covering such areas as flammability, resistance to ignition, thermal endurance and electrical properties. We can run separate investigations, as well, to evaluate the properties of critical module components. Customers also benefit from services such as joint UL/IEC and other international certifications, and ongoing R&D support from our PV materials experts. UL Solutions offers streamlined testing and certification of PV materials to: – UL 94, the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances – UL 746A, the Standard for Polymeric Materials – Short Term Property Evaluations – UL 746B, the Standard for Polymeric Materials – Long Term Property Evaluations – UL 746C, the Standard for Polymeric Materials – Use in Electrical Equipment Evaluations – UL 1703, the Standard for Flat-Plate Photovoltaic Modules and Panels – UL 61730-2, the Standard for Photovoltaic (PV) Module Safety Qualification – Part 2: Requirements for Testing and IEC 61730-2 PV module testing: Wiri
- [17] US8847063B2_-_Encapsulation_of_solar_cells_-_Google_Patents__afa4ee8d — patent
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after application by a curtain coater the adhesive was cured in the module in a Mid IR oven having a temperature profile of 120° C. and a speed of 0.5 m per minute for a length of 5 m. The electrical capabilities were measured before and after the 10 day aging process set down in the Humidity Freeze test described in IEC 1215, which comprised 10 cycles of 24 hours with the temperature varying from −40° C. to 85° C. in 85% relative Humidity (RH) Sample Characterization: Electrical characterization of the specimen has been done before and after conditioning, results are summarized in table 6 below None of the samples were showing discoloration or delamination and were passing the wet leakage current test as described in the IEC 1215 after the conditioning. In accordance with the requirements of IEC 1215 after conditioning a sample should not show any open circuit or leakage current, any visual defect and any decrease in maximum power should not be greater than 5% all of which the thin film modules of the present invention using the encapsulant alone (i.e. no adhesive layer required). These findings are totally contrary to the expectations of the industry and use of a silicone encapsulant as hereinbefore described is able to provide the level of protection suitable for solar or photovoltaic module of a polycrystalline Silicon wafer type. In this case the only difference from example 8 was the change in the solar cells used. The adhesive and encapsulant compositions were as descr
- [19] TaiyangNews_Reliable_PV_Module_Design_Conference__b89da2ef — magazine
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as Ni shared, is focused on optimizing quality and reliability across the life cycle of modules. While the existing basic IEC standards are necessary, these are not enough to ensure the modules have long-term reliability, opined Ni. She said along with ensuring quality raw material supply from qualified vendors, AI-powered manufacturing and QR-code encoded traceability for each panel it produces, LONGi conducts several simulation and failure studies for real-world application scenarios to minimize the possibility of failure/degradation for its modules in the field. Stressing on managing total quality control to ensure high reliability for the company's 210 Vertex modules, Trina Solar's Senior Product Manager Zhou Yangyang said that the company's in-house State Key Lab is central to these efforts. Here, the manufacturer conducts extensive research and development on new energy, PV advanced technology and its industrialization. For its flagship 210 Vertex modules, Trina Solar conducts 5 rigorous tests to prove its high mechanical reliability. The test results show that the modules can withstand uneven snow load of 2.8 m, can operate safely under 40 °C, can withstand 35 mm hail impact, have passed ±1500Pa Dynamic Load Test @ 20000 times, and also cleared 17 hurricane wind tests. While the IEC test standard requires modules to withstand 25 mm hail impact, Trina says its Vertex panels can power through 35 mm hail size under its own in-house test standard. By the end of 2023, the c
- [20] How_Long_Will_Solar_Panels_Last_How_Well_Will_-_CleanTechnica__ddcbdbe7 — authority
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make an informed decision – in summary, a lack of a universal testing standard for solar panel longevity and whole-of-life performance means solar companies and their customers are making sub-optimal decisions. At present, for a solar panel to be sold in Australia, it has to meet a set of minimum standards that ensure its safe operation, catches infant mortality failure mechanisms, and which grade its power production levels under standardised test conditions. Meeting these product standards is pretty much a requirement of being installed in any developed country. But these “golden panel” tests don’t provide any information about how the panel will perform over time, in real life conditions, nor how long the panel will last. Indeed, as a recent bulletin from the CEC illustrated, some of the panels sold internationally contain different components or don’t meet the rated power output of the ‘golden panels’ they supplied when meeting their IEC minimum requirements. Last week, the CEC presented problems uncovered by its PV module testing program. Our 2016 testing program targeted seven manufacturers based on complaints and reports received by the CEC. We purchased the modules from local trade suppliers and sent them to be tested at a university laboratory. The tests revealed a number of issues: Modules from four manufacturers measured an average of 4.4% below their rated output. More seriously, five manufacturers had substituted components during the production of the modules. T
- [24] Photovoltaic_Module_Testing_and_Certification_WO_TÜV__90d54ee4 — authority
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# Photovoltaic Module Testing and Certification Source: Blog/Web URL: https://www.tuv.com/world/en/photovoltaic-modules.html Author: TÜV Rheinland Date: 2026-01-01 Success in the solar industry starts with testing and certification To thrive in the solar energy sector, manufacturers and retailers need to ensure that their products meet established quality and performance standards. This means demonstrating that their PV modules are robust and able to consistently deliver the guaranteed rated power reliably even under more severe climactic conditions. They must also be safe and durable, ensuring the system’s high yield over the long term, and still need to be commercially viable. With more than 35 years in the solar industry, we have developed testing services that address your needs and enable you to meet your goals. At our ISO 17025 accredited laboratories around the globe, we test and certify PV modules according to national and international standards, including IEC 61215 and IEC 61730. Besides this we offer testing under special as well as more severe conditions, performance characterization and energy yield testing, just to name a few. We have earned the trust of key players in the solar sector worldwide with our expertise and experience. By partnering with us, you access that know-how and benefit from our global network of state-of-the-art labs around the world and comprehensive, one-stop PV services. Speak with one of our service engineers to find out how to get starte
- [25] RETC_releases_2024_PV_Module_Index_-_pv_magazine_Global__1fee92db — authority
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# RETC releases 2024 PV Module Index – pv magazine Global Source: Blog/Web URL: https://www.pv-magazine.com/2024/06/25/retc-releases-2024-pv-module-index/ Author: Ryan Kennedy Date: 2024-06-25 From pv magazine USA The Renewable Energy Test Center (RETC) released its 2024 PV Module Index report, evaluating the reliability, quality, and performance of solar panels. Solar modules are put through a variety of accelerated stress tests to evaluate these parameters. Through comparative test results, project stakeholders can select products best suited for a particular environment, location, or portfolio. To identify the best of the best, RETC reviewed and ranked the overall data distributions across three disciplines: quality, performance, and reliability. Find the overall top performers at the end of this report. Reliability Backsheet ultraviolet durability Top performers: JA Solar, Longi Solar, SolarSpace Backsheet ultraviolet durability (BUDT) incorporates a durability testing sequence to probe glass-on-backsheet PV module designs for vulnerabilities to UV exposure and prevent backsheet-related failures. This BUDT sequence starts with 1,000 hours of damp heat exposure to weaken polymeric bonds. Highlighted top performers experience no backsheet cracking in the test. Damp heat test Top performers: Astronergy, ES Foundry, Longi Solar, Runergy, and Trina Solar The RETC thresher test includes a damp heat test that exposes modules for 2,000 hours, double the amount required for produc
air can flow beneath and cool the equipment. Light-colored materials can be used in panel construction to limit heat absorption. And components like inverters and combiners, whose performance is particularly sensitive to heat, should be located in shaded areas, suggested CED Greentech. The same goes for snow, which can cover panels during heavier storms, limiting output. Snow can also cause a dynamic mechanical load, degrading the panels. Typically, snow will slide off of panels, as they are slick and run warm, but in some cases a homeowner may decide to clear the snow off the panels. This must be done carefully, as scratching the glass surface of the panel would make a negative impact on output. Degradation is a normal, unavoidable part of a panel’s life. Proper installation, careful snow clearing, and careful panel cleaning can help with output, but ultimately, a solar panel is a technology with no moving parts, requiring very little maintenance. Setting standards To ensure a given panel is likely to live a long life and operate as planned, it must undergo standards testing for certification. Panels are subject to the International Electrotechnical Commission (IEC) testing, which apply to both mono- and polycrystalline panels. EnergySage said panels that achieve IEC 61215 standard are tested for electrical characteristics like wet leakage currents, and insulation resistance. They under go a mechanical load test for both wind and snow, and climate tests that check for weakne
compromises the PV module’s durability and increases the risk of overhead installation hazards. The in-house enhanced stress test (9x more than IEC) reveals high durability of POE encapsulant compared to EVA under high UV radiations. Mr. Hanifi also noted the potential risk of humidity ingression inside module lamination under the presence of UV and temperature, resulting in corrosion, delamination, and discoloration. Recognizing the limitations of conventional IEC standards in ensuring the long-term durability and reliability of carport PV modules, as well as addressing overhead safety concerns, the company adopted testing protocols aligned with building-grade material standards. In collaboration with TU Darmstadt, AESOLAR validated the HORIZON series carport module’s resilience against UV, humidity, and temperature in compliance with the DIN ISO 12543-4 standard. According to this standard, which outlines durability testing for laminated and safety glass in building applications, the PV module and a counterpart 30 mm framed laminate without PV cells were subjected to a rigorous test sequence. This included a high-temperature test at 100°C for 16 hours, a two-week humidity test with 100% RH condensation at 50°C, and a 2,000-hour UV radiation test. The modules showed no significant defects, such as bubbles, delamination, or cloudiness, confirming the durability of the polymer stack. The company also reported peel test values averaging 91.26 N/cm – exceeding the required 79 N/
in the panels, lowering output. Some racking solutions are optimized for high-wind areas, protecting the panels from strong uplift forces and limiting microcracking. Typically, the manufacturer’s datasheet will provide information on the max winds the panel is able to withstand. The same goes for snow, which can cover panels during heavier storms, limiting output. Snow can also cause a dynamic mechanical load, degrading the panels. Typically, snow will slide off of panels, as they are slick and run warm, but in some cases a homeowner may decide to clear the snow off the panels. This must be done carefully, as scratching the glass surface of the panel would make a negative impact on output. (Read: “Tips for keeping your rooftop solar system humming over the long term“) Degradation is a normal, unavoidable part of a panel’s life. Proper installation, careful snow clearing, and careful panel cleaning can help with output, but ultimately, a solar panel is a technology with no moving parts, requiring very little maintenance. Standards To ensure a given panel is likely to live a long life and operate as planned, it must undergo standards testing for certification. Panels are subject to the International Electrotechnical Commission (IEC) testing, which applies to both mono- and polycrystalline panels. EnergySage said panels that achieve IEC 61215 standard are tested for electrical characteristics like wet leakage currents, and insulation resistance. They undergo a mechanical load te
# Top solar panel brands in performance, reliability, and quality – pv magazine Global Source: Blog/Web URL: https://www.pv-magazine.com/2023/08/01/top-solar-panel-brands-in-performance-reliability-and-quality/ Author: Ryan Kennedy Date: 2023-08-01 The Renewable Energy Test Center (RETC) released its 2023 PV Module Index report, evaluating the reliability, quality, and performance of solar panels. Solar modules are put through a variety of accelerated stress tests to evaluate these parameters. Through comparative test results, project stakeholders can select products best suited for a particular environment, location, or portfolio. Quality Hail durability Top performers: JA Solar, JinkoSolar, Trina Solar RETC’s hail durability test takes UL and IEC standards testing a step further, exposing solar modules to higher kinetic impact to reflect the risk posed by hail over a 25 or 30-year operating life. In addition to ballistic impact testing, RETC runs thermal cycle and hot-spot tests to reveal potential long-term module degradation. The top eight performers in this category withstood an effective kinetic energy of 20 Joules or more. These modules effectively demonstrated resistance to a 45 mm (1.8 in.) iceball traveling at a terminal velocity of 30.7 m/s (68.7 mph). Thresher Test Top performers: Astronergy, JA Solar Longi Solar, Runergy The thresher test is a summation of a series of tests that places modules under a variety of vigorous environmental stresses to provide quantita
# Top solar panel brands in performance, reliability, and quality – pv magazine Global Source: Blog/Web URL: https://www.pv-magazine.com/2023/08/01/top-solar-panel-brands-in-performance-reliability-and-quality/ Author: Ryan Kennedy Date: 2023-08-01 The Renewable Energy Test Center (RETC) released its 2023 PV Module Index report, evaluating the reliability, quality, and performance of solar panels. Solar modules are put through a variety of accelerated stress tests to evaluate these parameters. Through comparative test results, project stakeholders can select products best suited for a particular environment, location, or portfolio. Quality Hail durability Top performers: JA Solar, JinkoSolar, Trina Solar RETC’s hail durability test takes UL and IEC standards testing a step further, exposing solar modules to higher kinetic impact to reflect the risk posed by hail over a 25 or 30-year operating life. In addition to ballistic impact testing, RETC runs thermal cycle and hot-spot tests to reveal potential long-term module degradation. The top eight performers in this category withstood an effective kinetic energy of 20 Joules or more. These modules effectively demonstrated resistance to a 45 mm (1.8 in.) iceball traveling at a terminal velocity of 30.7 m/s (68.7 mph). Thresher Test Top performers: Astronergy, JA Solar Longi Solar, Runergy The thresher test is a summation of a series of tests that places modules under a variety of vigorous environmental stresses to provide quantita
PV modules. The hydrolysis-degradation mode contribution is quite minor in desert locations due to low air humidity. Solder bonds and fingers corrode more slowly and have a longer lifespan in the desert than in tropical regions. Hot desert testing standards Accelerated ageing test standards are used for assessing the degradation modes and predicting the long-term performance of PV modules. Accurately forecasting module lifetimes based on degradation modes and the interaction between BOMs and climatic conditions are of significant interest. However, the existing IEC 61215 and IEC 61730 standards primarily focus on design and safety qualification tests for PV modules under moderate climate conditions. The drawbacks of current standards include: • Single-stress chambers cannot replicate multi-degradation modes. • Standard tests do not encompass the evaluation of multiple environmental stressors, new BOMs and new climate-specific failure modes. • Combined Accelerated Stress Testing (C-AST) and Module Accelerated Sequential Testing (MAST) take several months and are expensive. • IEC TS 63126:2020 specifies a single-stress approach for qualifying PV modules, components and materials for high-temperature operation. As discussed in the previous section, desert PV modules often experience defects such as premature encapsulant discolouration, significant thermomechanical damage and glass abrasion. However, the current IEC 61215 testing standards fail to adequately account for the incre
further research into climate-specific standards and PV module designs for desert applications. Conclusions The growing rate of installation of PV modules in desert climates raises concerns about bankability and reliability due to the harsh environmental conditions. Performance loss and degradation in deserts differ significantly from moderate climates, with common failure modes including encapsulant discolouration, interconnect breakages, backsheet cracks, chalking and glass abrasion (ARC removal). However, current IEC 61215 testing standards do not adequately address these issues. To promote reliable PV module performance in desert conditions, a new qualification test cycle, the “Hot Desert Test Cycle (HDTC)”, should be developed. HDTC would involve multiple tests targeting problems such as encapsulant discolouration, backsheet cracks/delamination, thermal fatigue, mechanical stability and glass abrasion caused by desert conditions. To mitigate degradation and failure rates in deserts, PV modules should incorporate desert-resistant glazing materials, advanced high-performance solar cells with robust metallisation, durable encapsulants, and reliable backsheet materials. These recommendations serve as a foundation for further research into desert-specific testing standards and PV module designs. References [1] Adothu, B. et al., 2024, “Comprehensive review on performance, reliability, and roadmap of c-Si PV modules in desert climates: A proposal for improved testing standard”
# Solar Materials and Components Certification Source: Blog/Web URL: https://www.ul.com/services/solar-materials-and-components-certification Author: Date: 2026-01-01 Polymeric materials and PV module certification Polymeric materials are essential to the fabrication of PV modules and used in critical components such as substrates, encapsulants, back sheets and adhesives. Safety compliance with established standards minimizes risk of failure and helps ensure safe operation, covering such areas as flammability, resistance to ignition, thermal endurance and electrical properties. We can run separate investigations, as well, to evaluate the properties of critical module components. Customers also benefit from services such as joint UL/IEC and other international certifications, and ongoing R&D support from our PV materials experts. UL Solutions offers streamlined testing and certification of PV materials to: – UL 94, the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances – UL 746A, the Standard for Polymeric Materials – Short Term Property Evaluations – UL 746B, the Standard for Polymeric Materials – Long Term Property Evaluations – UL 746C, the Standard for Polymeric Materials – Use in Electrical Equipment Evaluations – UL 1703, the Standard for Flat-Plate Photovoltaic Modules and Panels – UL 61730-2, the Standard for Photovoltaic (PV) Module Safety Qualification – Part 2: Requirements for Testing and IEC 61730-2 PV module testing: Wiri
after application by a curtain coater the adhesive was cured in the module in a Mid IR oven having a temperature profile of 120° C. and a speed of 0.5 m per minute for a length of 5 m. The electrical capabilities were measured before and after the 10 day aging process set down in the Humidity Freeze test described in IEC 1215, which comprised 10 cycles of 24 hours with the temperature varying from −40° C. to 85° C. in 85% relative Humidity (RH) Sample Characterization: Electrical characterization of the specimen has been done before and after conditioning, results are summarized in table 6 below None of the samples were showing discoloration or delamination and were passing the wet leakage current test as described in the IEC 1215 after the conditioning. In accordance with the requirements of IEC 1215 after conditioning a sample should not show any open circuit or leakage current, any visual defect and any decrease in maximum power should not be greater than 5% all of which the thin film modules of the present invention using the encapsulant alone (i.e. no adhesive layer required). These findings are totally contrary to the expectations of the industry and use of a silicone encapsulant as hereinbefore described is able to provide the level of protection suitable for solar or photovoltaic module of a polycrystalline Silicon wafer type. In this case the only difference from example 8 was the change in the solar cells used. The adhesive and encapsulant compositions were as descr
as Ni shared, is focused on optimizing quality and reliability across the life cycle of modules. While the existing basic IEC standards are necessary, these are not enough to ensure the modules have long-term reliability, opined Ni. She said along with ensuring quality raw material supply from qualified vendors, AI-powered manufacturing and QR-code encoded traceability for each panel it produces, LONGi conducts several simulation and failure studies for real-world application scenarios to minimize the possibility of failure/degradation for its modules in the field. Stressing on managing total quality control to ensure high reliability for the company's 210 Vertex modules, Trina Solar's Senior Product Manager Zhou Yangyang said that the company's in-house State Key Lab is central to these efforts. Here, the manufacturer conducts extensive research and development on new energy, PV advanced technology and its industrialization. For its flagship 210 Vertex modules, Trina Solar conducts 5 rigorous tests to prove its high mechanical reliability. The test results show that the modules can withstand uneven snow load of 2.8 m, can operate safely under 40 °C, can withstand 35 mm hail impact, have passed ±1500Pa Dynamic Load Test @ 20000 times, and also cleared 17 hurricane wind tests. While the IEC test standard requires modules to withstand 25 mm hail impact, Trina says its Vertex panels can power through 35 mm hail size under its own in-house test standard. By the end of 2023, the c
make an informed decision – in summary, a lack of a universal testing standard for solar panel longevity and whole-of-life performance means solar companies and their customers are making sub-optimal decisions. At present, for a solar panel to be sold in Australia, it has to meet a set of minimum standards that ensure its safe operation, catches infant mortality failure mechanisms, and which grade its power production levels under standardised test conditions. Meeting these product standards is pretty much a requirement of being installed in any developed country. But these “golden panel” tests don’t provide any information about how the panel will perform over time, in real life conditions, nor how long the panel will last. Indeed, as a recent bulletin from the CEC illustrated, some of the panels sold internationally contain different components or don’t meet the rated power output of the ‘golden panels’ they supplied when meeting their IEC minimum requirements. Last week, the CEC presented problems uncovered by its PV module testing program. Our 2016 testing program targeted seven manufacturers based on complaints and reports received by the CEC. We purchased the modules from local trade suppliers and sent them to be tested at a university laboratory. The tests revealed a number of issues: Modules from four manufacturers measured an average of 4.4% below their rated output. More seriously, five manufacturers had substituted components during the production of the modules. T
# Photovoltaic Module Testing and Certification Source: Blog/Web URL: https://www.tuv.com/world/en/photovoltaic-modules.html Author: TÜV Rheinland Date: 2026-01-01 Success in the solar industry starts with testing and certification To thrive in the solar energy sector, manufacturers and retailers need to ensure that their products meet established quality and performance standards. This means demonstrating that their PV modules are robust and able to consistently deliver the guaranteed rated power reliably even under more severe climactic conditions. They must also be safe and durable, ensuring the system’s high yield over the long term, and still need to be commercially viable. With more than 35 years in the solar industry, we have developed testing services that address your needs and enable you to meet your goals. At our ISO 17025 accredited laboratories around the globe, we test and certify PV modules according to national and international standards, including IEC 61215 and IEC 61730. Besides this we offer testing under special as well as more severe conditions, performance characterization and energy yield testing, just to name a few. We have earned the trust of key players in the solar sector worldwide with our expertise and experience. By partnering with us, you access that know-how and benefit from our global network of state-of-the-art labs around the world and comprehensive, one-stop PV services. Speak with one of our service engineers to find out how to get starte
# RETC releases 2024 PV Module Index – pv magazine Global Source: Blog/Web URL: https://www.pv-magazine.com/2024/06/25/retc-releases-2024-pv-module-index/ Author: Ryan Kennedy Date: 2024-06-25 From pv magazine USA The Renewable Energy Test Center (RETC) released its 2024 PV Module Index report, evaluating the reliability, quality, and performance of solar panels. Solar modules are put through a variety of accelerated stress tests to evaluate these parameters. Through comparative test results, project stakeholders can select products best suited for a particular environment, location, or portfolio. To identify the best of the best, RETC reviewed and ranked the overall data distributions across three disciplines: quality, performance, and reliability. Find the overall top performers at the end of this report. Reliability Backsheet ultraviolet durability Top performers: JA Solar, Longi Solar, SolarSpace Backsheet ultraviolet durability (BUDT) incorporates a durability testing sequence to probe glass-on-backsheet PV module designs for vulnerabilities to UV exposure and prevent backsheet-related failures. This BUDT sequence starts with 1,000 hours of damp heat exposure to weaken polymeric bonds. Highlighted top performers experience no backsheet cracking in the test. Damp heat test Top performers: Astronergy, ES Foundry, Longi Solar, Runergy, and Trina Solar The RETC thresher test includes a damp heat test that exposes modules for 2,000 hours, double the amount required for produc