C1100 Copper Busbar Export: Chilean 100MW Solar Farm Deploys High-Current Power Distribution System
Published On: July 6, 2026
Case Study: Powering a 100MW Solar Project in Chile with Custom-Engineered Copper Busbars
Client Background
Our client is a renewable energy project developer based in Chile, responsible for the design, construction, and operation of large-scale photovoltaic solar farms integrated with battery energy storage systems (BESS). Chile's Atacama Desert region offers some of the highest solar irradiance on the planet, making the country a global leader in solar energy deployment.
Project Requirements
The client required high-conductivity copper busbars for the power collection and distribution system of a new 100MW solar farm. The busbars serve as the backbone of the electrical infrastructure, channeling high DC current from photovoltaic arrays to inverters and subsequently to the grid interconnection point:
| Requirement | Specification | Criticality |
|---|---|---|
| Electrical Conductivity | ≥100% IACS (C11000 grade) | Essential for minimizing power losses in high-current DC transmission |
| Current-Carrying Capacity | High-amperage continuous load | Must withstand sustained high current without overheating or voltage drop |
| Custom Fabrication | CNC-drilled mounting holes per engineering drawings | Precision required for seamless integration with inverter and combiner box connections |
| Surface Protection | Tin plating for anti-oxidation | Atacama's extreme temperature swings and occasional humidity demand robust surface treatment |
Our Solution
We supplied C11000 electrolytic tough pitch copper busbars, fully fabricated to the project's engineering specifications through a comprehensive manufacturing and quality assurance process:
- High-Conductivity C11000 Material: Sourced from certified electrolytic copper cathode with conductivity exceeding 100% IACS, ensuring minimal resistive losses across the busbar network. This directly translates to higher energy yield delivered to the grid.
- CNC Precision Machining: All busbars were processed on CNC machining centers to the client's exact engineering drawings, including precisely positioned mounting holes, slotted connections, and custom end profiles. Dimensional tolerance was maintained within ±0.1mm across the full production batch.
- Tin Plating for Corrosion Protection: Each busbar received a uniform tin-plated surface finish, providing excellent oxidation resistance critical for the Atacama Desert's demanding environmental conditions, where daytime temperatures can exceed 40°C and nighttime drops create condensation risks.
- Current-Carrying Capacity Test Report: We provided a detailed ampacity test report for each busbar configuration, documenting temperature rise under rated load conditions and verifying compliance with IEC standards for electrical busbar systems.
Delivery Terms
- FOB Shanghai Port: Flexible shipping terms allowing the client to nominate their preferred freight forwarder for the ocean leg to Chilean ports, with all export documentation and certificates of origin prepared in advance.
Results Achieved
| Metric | Before | After |
|---|---|---|
| Project Deployment | Sourcing from multiple unverified vendors | Single-source supply for entire 100MW busbar system |
| Conductivity Performance | Inconsistent across batches | 100%+ IACS verified per batch |
| Fabrication Accuracy | Manual drilling with variable precision | CNC precision within ±0.1mm |
| Surface Protection | Bare copper with oxidation risk | Uniform tin plating, zero oxidation |
| Business Expansion | PV busbars only | Extended to BESS energy storage system procurement |
Key Takeaways
This project demonstrates the critical role of precision-engineered copper busbars in the global renewable energy transition. For utility-scale solar developments, busbar quality directly impacts system efficiency, reliability, and long-term operational costs. By delivering C11000-grade conductivity, CNC fabrication accuracy, and validated ampacity test data, we established ourselves as a trusted supplier in a technically demanding sector.
The initial success on the 100MW photovoltaic installation led the client to expand our scope to include busbars for their battery energy storage systems, confirming that technical competence and quality assurance are the strongest drivers of long-term partnership in the renewable energy supply chain.
