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As the world leader for Copper and Aluminum PV ribbon, Ulbrich Solar Technologies maintains a program of ongoing capacity expansion that makes Ulbrich the most reliable source to its customers. Research & Development drives process improvements and product innovations to keep up with the industry’s constantly evolving technologies.

Our products are used in the following areas of PV module production:

  • tabbing ribbon and wires to interconnect cells into strings

  • bus ribbon to interconnect the strings in a crystalline module, and their connection to the junction box

  • bus ribbon to collect the power from thin film modules and internal connection to the junction box

  • metal foils used as substrates for depositing thin film PV layers (flexible thin film manufacturing)

prematerial ribbon
automatic spooling ribbon
very thin ribbon
Perfect winding

Our ribbons are rolled from round copper and then hot-dipped, resulting in a burr-free and completely coated ribbon ensuring perfect soldering to cells. 
After careful analysis of your requirements, our ribbons are manufactured exactly to your specifications. All critical mechanical parameters of the ribbons will be adapted to best suit your production processes. We can produce any size (thickness/width) with a large variety of solder coatings (leaded and lead-free) with the thickness you specify. Other special metal coatings, such as flash gold or silver coatings, are also possible. By controlling the above parameters, our ribbons are well adapted for all soldering processes, as well as conductive adhesive and ultrasonic bonding applications.
We realize copper ribbon is a very important part of your solar modules. Highest electrical performance and long-term reliability are essential to ensure these critical connections carry the maximum power during the entire lifespan of your modules. Talk to our specialists today to help you select the optimum flat wire connector to suit your requirements.







Innovative solar cell concepts require adaptive Bus-bar technologies that promise efficiency gains, lower series resistance, less shadowing
and the reduction of silver consumption.
Two and three Bus-bar technologies have dominated the Solar Industry for a long time, however advanced and more powerful generations
of solar cells require new designs and a higher number of Bus-bars to carry the extra current. Today’s technology includes four,
five, six or even more Bus-bars.
One of the new innovations in PV module design and solar cell technology has replaced the traditional use of copper flat wire with a
tinned copper round wire.
The small dimension of the round wire allows a narrower Bus-bar width on the solar cell reducing the shadowing loss with traditional
rectangular ribbon, while maintaining optimal power gains for the best output results.
The natural curved shape of the round wire’s surface makes it possible to reduce the shadowing loss by internal light reflection.
Multiple Bus-bar solar technology will make significant contributions to present and future PV module performance achievements.



Ulbrich Multitabbing Multiwire

Optimized mechanical properties of the Multi-Tabbing PV Wire improve the thermo-mechanical stress situation caused by the different thermal expansion coefficients of the copper wire and silicon solar cell.
Standard and custom PV Ribbon spools can be offered to fit current pay-off systems of the stringer equipment.


In summary Multi-Tabbing PV Wire is,
• Concentric solder coated round wire for high efficiency solar cell modules
• Available in lead or lead free solder materials including special low melting temperature materials
• Engineered to your unique dimension, surface coating and physical property requirements
• Manufactured with state of the art processes to ensure consistent product properties
• Precision wound and packaged for safe transportation and stringer processing
• Flexible concerning cell bond options regardless of the heat source

• Manufactured according to ISO certified processes

Ulbrich Multitabbing Multiwire
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