Introducing Baoding Lekai International Ltd. – Leader in Solar Backsheet Solutions
Baoding Lekai International Ltd. is a globally recognized manufacturer and innovator in the photovoltaic industry, specializing in advanced solar backsheets, EVA solar backsheet, PV backsheet film, and a comprehensive array of reliable, high-performance backsheet solutions.
With decades of expertise in advanced fluoropolymer chemistry, automated laminating, coating, and state-of-the-art quality control, Baoding Lekai ensures that every solar backsheet delivers unmatched performance for demanding global markets.
Industry Trends: Evolution of Solar Backsheet Technology
As the global solar PV market surpasses 1 TW cumulative installed capacity, the demand for high-durability, reliable, and cost-effective solar backsheet materials has surged. According to reports from Solar Power World and the journal ScienceDirect, leading trends include:
- Growth in high-efficiency bifacial and PERC panels, driving material innovation in solar backsheets and eva solar backsheet structures.
- Rising adoption of fluorinated coatings for superior UV and weather resistance.
- Push towards thinner, lighter solar backsheet film for advanced module designs.
- Increasing focus on circularity and recyclable backsheet of solar panel materials.
Solar backsheet reliability is essential for both rooftop, utility-scale PV farms, and emerging applications such as BIPV (Building Integrated PV), agricultural solar, and mobile/off-grid systems.
What is a Solar Backsheet?
The solar backsheet is the outermost protective layer of photovoltaic (PV) modules, designed to provide insulation, environmental protection, electrical safety, and mechanical support.
Typical structures consist of multi-layer films: fluorinated polymers (e.g., PVDF, PET, ETFE), adhesive layers, and EVA backsheet.
Performance criteria include ultraviolet (UV) resistance, hydrolysis resistance, excellent adhesion to encapsulant (EVA, POE), electrical insulation, and long-term weatherability.
Key Technical Parameters of Solar Backsheet (Industry Reference Table)
| Parameter |
Typical Value |
Industry Standard |
Notes |
| Total Thickness |
260-370 μm |
IEC 61730-1:2016 ≥ 250 μm |
Ensures insulation & handling |
| Water Vapor Transmission Rate (WVTR) |
0.5-1.5 g/m²/day |
≤ 2.0 g/m²/day |
Controls moisture ingress |
| Breakdown Voltage |
> 20 kV |
Min. 16 kV |
Electrical insulation protection |
| Tensile Strength |
≥ 90 MPa (MD) |
> 80 MPa |
Mechanical durability |
| UV Resistance (QUVB/cycle) |
≥ 2000 hours |
- |
Long-term field performance |
| Adhesion (to EVA) |
> 60 N/25mm |
> 45 N/25mm |
Delamination protection |
| Thermal Shrinkage (150℃/30min) |
< 1.5% |
< 2.0% |
Shape retention under heat |
| Color Stability (ΔE) |
< 3.0 |
- |
Aesthetics, field durability |
Lucky Cpct1 Solar Backsheet from Baoding Lekai International Ltd. is engineered to excel in high-temperature, high UV, and extreme field conditions. Key features:
- Reliable Adhesion & Thermal Stability with cutting-edge adhesive layer and fluorinated coating.
- Exceptional water vapor barrier, ensuring pv backsheet longevity.
- High breakdown voltage and environmental resistance for maximum safety.
- Simplified lamination in automated assembly lines.
Product page:
https://www.lkintl.com/lucky-cpct1-solar-backsheet.html
Technical Data Visualization for Solar Backsheet
Applications of Solar Backsheet & EVA Solar Backsheet Materials
- Rooftop PV Modules: Both residential and commercial rooftops demand strong weatherable solar backsheets for 25~30 year lifespans.
- Utility-Scale PV Plants: Advanced backsheets enable gigawatt-scale fields to maintain output stability in harsh environments (deserts, mountains, tropics).
- BIPV / Facade Modules: Color-stable, fire-resistant backsheets for architectural integration.
- Agricultural PV (AgriPV): EVA solar backsheet with tailored light transmittance benefits crop-light cohabitation.
- Mobile & Off-grid: Lightweight, high-flexibility backsheet of solar panel designs for portable, folding, or vehicle-integrated PV.
Solar backsheet film selection defines operational durability, efficiency, and system safety—driving vast market reliance on solar backsheet innovation.
Expert Q&A: Solar Backsheet & PV Backsheet Key Terminology
- Q1: What materials are commonly used in solar backsheets?
-
A: The most popular materials include fluoropolymers (PVDF, PVF/Tedlar, ETFE), Polyethylene Terephthalate (PET), EVA (ethylene-vinyl acetate), and advanced hybrids for specific environments.
- Q2: What is the purpose of the adhesive layer in EVA solar backsheet?
-
A: The adhesive (often modified EVA or acrylic) ensures secure bonding between PET/fluoropolymer film and module encapsulant, preventing delamination and interface aging.
- Q3: What is the industry standard thickness for backsheet of solar panel?
-
A: Typically 260–370 μm, balancing insulation, mechanical robustness, and process compatibility (DuPont Reference).
- Q4: How is breakdown voltage tested for pv backsheet?
-
A: Under the IEC 61730 protocol, voltage is increased until dielectric failure. Reliable products reach >20 kV, far exceeding module safety requirements.
- Q5: Are backsheets resistant to UV and hydrolysis in tropical climates?
-
A: Modern backsheets—especially with fluorinated topcoats—achieve >2000 h QUV accelerated aging, meeting or surpassing the >25-year lifespan needed for tropical sun and humidity.
- Q6: Is Lucky Cpct1 compatible with bi-facial PV modules?
-
A: Yes. Its low-reflectivity, high-barrier solar backsheet structure is suitable for advanced cell types, including bifacial, PERC, and TOPCon.
- Q7: How is ‘Thermal Shrinkage’ relevant during module installation?
-
A: Low thermal shrinkage (
Why Choose Lucky Cpct1 Solar Backsheet from Baoding Lekai International Ltd.?
- Industry Authority: Recognized on industry forums such as PV-Tech and published technical references [Energies Journal].
- Decades of Expertise: In-house research, complete supply chain, and robust testing facilities.
- Customized Service: Fast design, sample, and technical support for global partners.
- Sustainable Manufacturing: Focused on recyclable, low-carbon PV backsheet solutions.
- Global Delivery: Serving clients across Europe, US, MENA, and Asia-Pacific.
For specification sheets, technical consultation or quotation requests, please contact:
Tel: +86 312 7922835
Email: caozhiqiang@lkintl.com
Product Link: Lucky Cpct1 Solar Backsheet
Conclusion & References
As the PV industry evolves towards higher reliability, lower LCOE, and environmentally friendly materials, solar backsheet technology is at the heart of advanced PV module systems. Baoding Lekai International Ltd., with flagship solutions like Lucky Cpct1 solar backsheet, exemplifies next-gen performance, proven by global standard compliance and field results.
For further industry data, expert case studies, and updated technical guidance, visit Baoding Lekai International Ltd. or consult recognized journals and forums above.
