Copper-Aluminum Composite PV Ribbon & Busbar Ribbon
Copper-Aluminum Composite Busbar Ribbon
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Composite busbar ribbon collects current between cell strings and module connections. Its copper-aluminum construction reduces copper use compared with an all-copper conductor of the same size. Select the section and solder coating around the module current path, joint design and soldering process.
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Construction and specification
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| Item | Specification |
|---|---|
| Material construction | Copper-aluminum composite or specified copper base with the coating defined by the cell process |
| Product form | Busbar ribbon |
| Width range | Common PV ribbon widths; custom dimensions by drawing |
| Thickness range | PV module interconnection thickness range; custom by module design |
| Surface | Tin or solder coating options by soldering process |
| Packaging | Spool, traverse wound spool or customer-specified package |
Specification design factors
Drawing-defined specification
Geometry and performance
- Width, thickness and edge geometry define a narrow flat conductor.
- Metal layers and solder or insulation coatings perform different functions.
- Spool format, winding tension and joining behavior connect the material to the assembly process.
Selection and processing
Busbar ribbon collects current between strings and module connections. Compare the complete path length and resistance with the reference conductor, then define section, coating and joint layout. Copper content and conductor quantity both enter a material-use comparison.
Material and form references
Rolled strip, foil and flat wire are defined by material, temper, section and finished-part requirements. Their geometry and test methods differ from those of round wire.
Standards and product formsProduct questions
How does a PV busbar carry string current?
The busbar collects current along the string connection path. Segment length, cumulative current, section and joints govern resistance and temperature rise. The path ends at the module connection or junction box.
Is copper proportion the same as electrical conductivity?
No. Copper proportion describes a mass, volume or area basis. Conductivity describes electrical behavior under stated measurement conditions. The supplied construction identifies both, together with section, material condition and resistance.
How are width and thickness related to the finished part?
The drawing pairs width and thickness and identifies corners, edge condition and temper. Separate width and thickness limits do not establish every combination. A coating or insulation build is recorded separately from the bare metal section.
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- Width, thickness and tolerances
- Edge condition, burr, surface and roll dimensions
- Core and outer-layer metals, each layer or ratio, and mass or volume basis
- Coating alloy and thickness, soldering conditions, cell layout and spool format
- Quantity, spool or coil format, packaging and delivery destination