# Interconnection Busbar – Solar Cell String Current > Premium interconnection busbar solutions for solar module assembly, featuring high-purity tinned copper construction ![Interconnection Busbar – Solar Cell String Current](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026032713037538.jpg.webp) #### Interconnection Busbar – Solar Cell String Current Premium interconnection busbar solutions for solar module assembly, featuring high-purity tinned copper construction ##### Stock: Available | 30~60 days manufacturing time ##### Category: Raw Materials ##### Tags: Ribbon --- --- ## Product Introduction The **Interconnection Busbar** represents the pinnacle of current collection technology in modern solar module manufacturing. Often referred to as the "current superhighway" of photovoltaic modules, this critical component serves as the main electrical artery that efficiently collects and conducts the combined current from multiple cell strings to the [junction box](https://www.ooitech.com/junction-box-welding-machine-ks-01c-automatic-solar-panel-junction-box-soldering-equipment-ooitech.html). Unlike standard interconnecting ribbons that connect individual solar cells, the interconnection busbar is specifically engineered with a significantly wider and thicker profile to handle the substantial current loads generated by entire cell strings. This premium tin-coated copper ribbon acts as the primary conductor that bridges the gap between the intricate cell-level connections and the module's external output terminals. Our interconnection busbars are manufactured to the highest industry standards, utilizing state-of-the-art production processes that ensure consistent quality, optimal conductivity, and long-term reliability. Each busbar undergoes rigorous quality control to guarantee performance that meets the demanding requirements of modern solar module production, from residential rooftop installations to utility-scale solar farms. ## Technical Specifications | Parameter | Specification | Tolerance | | --- | --- | --- | | Core Material | High-purity oxygen-free copper (≥99.99% Cu) | - | | Conductivity | ≥58 MS/m (100% IACS) | ±1% | | Width Range | 4.0mm - 12.0mm | ±0.05mm | | Thickness Range | 0.15mm - 0.35mm | ±0.01mm | | Solder Coating | Sn60Pb40 or Lead-free options | - | | Coating Thickness | 10-25 μm | ±2 μm | | Tensile Strength | 200-250 MPa (annealed state) | ±10 MPa | | Elongation | ≥25% | - | | Resistivity | ≤0.0175 Ω·mm²/m | - | | Operating Temperature | -40°C to +90°C | - | | Current Capacity | Up to 50A (depends on dimensions) | - | | Surface Quality | Smooth, uniform coating, no oxidation | Visual inspection | | Softness Grade | Fully annealed (soft temper) | HV 45-65 | | Packaging | Spools of 100-500m | Custom available | ## Technical Advantages ### 1. Superior Current Carrying Capacity - **Optimized Cross-Section**: Engineered with larger cross-sectional area compared to standard ribbons, reducing resistance by up to 60% - **Minimal Power Loss**: Advanced design ensures I²R losses are kept below 0.5% of total module power - **High Amperage Handling**: Capable of conducting 30-50A continuous current without significant heating ### 2. Enhanced Mechanical Properties - **Ultra-Soft Annealed State**: Minimizes mechanical stress on solder joints during thermal cycling - **Excellent Flexibility**: Prevents joint fatigue and cracking over 25+ years of operation - **Stress Relief Design**: Accommodates thermal expansion and contraction without compromising connections ### 3. Premium Material Quality - **99.99% Pure Copper Core**: Ensures maximum electrical conductivity and minimal resistance - **Uniform Solder Coating**: Guarantees consistent, reliable soldering with >95% joint efficiency - **Corrosion Resistance**: Special coating formulation provides long-term protection against environmental degradation ### 4. Advanced Manufacturing Technology - **Precision Rolling Process**: Achieves uniform thickness tolerance within ±0.01mm - **Continuous Quality Monitoring**: Real-time inspection ensures zero defects - **Customizable Specifications**: Available in various widths and thicknesses to match specific module designs ### 5. Compatibility with Modern Technologies - **MBB Integration**: Fully compatible with Multi-Busbar and Super MBB module designs - **Half-Cell Ready**: Optimized for half-cell module configurations - **Shingled Cell Compatible**: Adaptable to advanced shingled cell interconnection systems ## Product Applications ### Standard Module Manufacturing The interconnection busbar is essential in conventional 60-cell and 72-cell module production, where it serves as the primary current collector connecting cell strings to junction boxes. In these applications, typically 2-3 busbars are used per module, carrying the combined current of 20-24 cells each. ### High-Power Module Production In advanced high-power modules (500W+), including bifacial and PERC technologies, our busbars provide the necessary current handling capacity for increased power densities. The wider cross-section options (8-12mm) are specifically designed for these high-current applications. ### Half-Cell Module Technology Half-cell modules require specialized busbar configurations to manage the unique current flow patterns. Our busbars are optimized for the center-split design, providing efficient current collection from parallel-connected half-cell strings while maintaining minimal resistive losses. ### Multi-Busbar (MBB) Systems While MBB technology uses multiple thin wires at the cell level, our interconnection busbars still play a crucial role in collecting the aggregated current from MBB cell strings. Special low-profile designs are available for seamless integration with MBB architectures. ### Specialized Applications - **Building-Integrated PV (BIPV)**: Custom-colored coatings available for aesthetic integration - **Flexible Modules**: Ultra-thin options for bendable solar applications - **Concentrated PV (CPV)**: High-temperature resistant variants for concentrated solar systems - **Space Applications**: Special low-outgassing formulations for satellite solar arrays ## Contact & Purchase Information ### Get Your Premium Interconnection Busbar Solution Today! Ooitech specializes in providing complete solar module production line equipment and materials, including high-quality interconnection busbars that meet the most demanding manufacturing standards. Our comprehensive service includes equipment design, delivery, training, raw materials supply, and after-sales support. **Email:** [info@ooitech.com](mailto:info@ooitech.com)**Phone:** +86 18571646990**WhatsApp:** +86 15961592660**Headquarters:** Wuhan Yangtze River Center, Wuhan, China**Website:** [www.ooitech.com](http://www.ooitech.com) ### Why Choose Ooitech? - Complete production line solutions from 5MW to 1GW capacity - Expert support for G1, M6, M10, M12, MBB, PERC, [TOPCon](https://www.ooitech.com/what-is-topcon-solar-cell-a-complete-guide-to-tunnel-oxide-passivated-contact-technology.html), IBC, ABC, HPBC technologies - Comprehensive training programs and technical support - Premium quality materials with international certifications **Download Our Complete Catalog:** [Click Here](https://drive.google.com/file/d/1EWA3TV6hJb_cAUH6w0UENpRglAgq_Kzv/view?usp=sharing)**Company Profile:** [Download PDF](https://drive.google.com/file/d/1yg9NLXzLOmPWriYScQZeM6ZfSZ8gcQ88/view?usp=sharing)**YouTube Channel:** [Subscribe to Ooitech](https://www.youtube.com/ooitech)**▶️ Watch Our MBB Production Line:** [View Video](https://www.youtube.com/watch?v=uRS9sn94sIQ) **Request a Quote Today!** Contact our technical team for customized busbar specifications and bulk pricing. Subscribe to our YouTube channel for the latest solar manufacturing insights and technology updates! ## Related Items ![PV Backsheet for Solar Modules — TPT, KPK, PVDF](https://cdn.ooitech.com/static/upload/image/20260326/1774518934395196.webp) #### PV Backsheet for Solar Modules — TPT, KPK, PVDF ![Solar Panel Sealant and Tape — Silicone, Butyl, Busbar](https://cdn.ooitech.com/static/upload/image/20260327/2026032711586064.jpg.webp) #### Solar Panel Sealant and Tape — Silicone, Butyl, Busbar ![PV Ribbon and Flux — Low-Temperature Soldering Ribbon](https://cdn.ooitech.com/static/upload/image/20260327/2026032717287347.webp) #### PV Ribbon and Flux — Low-Temperature Soldering Ribbon ![Solar Panel Aluminum Frame — Anodized, G1/M6/M10/M12](https://cdn.ooitech.com/static/upload/image/20260327/2026032713454036.jpg.webp) #### Solar Panel Aluminum Frame — Anodized, G1/M6/M10/M12 ![Low-Iron Tempered Solar Glass: 93.5% with AR Coating](https://cdn.ooitech.com/static/upload/image/20260326/1774514074283403.webp) #### Low-Iron Tempered Solar Glass: 93.5% with AR Coating ![Interconnection Busbar – Solar Cell String Current](https://cdn.ooitech.com/static/upload/image/20260327/2026032713037538.jpg.webp) #### Interconnection Busbar – Solar Cell String Current ![Solar Junction Box and Diode Box — IP67/IP68 Rated](https://cdn.ooitech.com/static/upload/image/20260327/2026032739568544.jpg.webp) #### Solar Junction Box and Diode Box — IP67/IP68 Rated ![EVA Encapsulant Film: over 80 N/cm Peel to Glass](https://cdn.ooitech.com/static/upload/image/20260326/1774518543829873.webp) #### EVA Encapsulant Film: over 80 N/cm Peel to Glass ![](/template/ooitech/assets/img/shape/06.png) ![](https://cdn.ooitech.com/runtime/image/w800_h700_fitblur_v2_w800_h700_fitblur_v2_1757399770541443.webp) ### Request A Quote All uploads are secure and confidential. ## We deliver expertise you can trust our service Direct-from-Factory Equipment. ![](/template/ooitech/assets/img/icon/money-2.svg) ### Cost-Effective Advantages We deliver exceptional value, maximizing results while optimizing budgets for clients. ![](/template/ooitech/assets/img/icon/staff.svg) ### Our Experience Team Our skilled professionals specialize in innovative solutions and tailored strategies. ![](/template/ooitech/assets/img/icon/certified.svg) ### 15+ Years Industry Experience Deep expertise ensures reliable, trend-aware, and proven outcomes for success. ![](https://cdn.ooitech.com/static/upload/image/20250910/1757477357667605.webp) ![](https://cdn.ooitech.com/static/upload/image/20250910/1757477724911512.webp) ![](/template/ooitech/assets/img/shape/06.png) ## What Our Client Say's about us Client testimonials praise our deep understanding of their challenges, which leads to innovative solutions and strong ROI. Long-term collaborations—some over a decade—demonstrate their trust and satisfaction. Their success stories drive us to continually exceed expectations. [Know More **](#quote-form) ![](/template/ooitech/assets/img/icon/quote.svg) A man with a big soul. Thank you very much for your visit Mr Wu. Thank you very much for the services provided in installing equipment and training my students. 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