Industry Challenges
Utility-scale battery energy storage projects push connection components to their limits. SUNKEAN cable and harness solutions are engineered around the challenges that decide project success.
Managing High Power & Thermal Stress
High-current DC circuits inside battery racks and containers generate sustained heat. Our cable and harness designs control temperature rise and keep performance stable under continuous high-power duty.
Simplifying Installation & System Integration
Battery racks, containers and PCS rooms need pre-engineered, plug-and-play assemblies that reduce on-site termination work and speed up system integration.
Meeting Global Safety & Compliance Standards
Energy storage installations require cabling that satisfies international flame, smoke and electrical safety requirements. SUNKEAN products are qualified to the standards storage projects rely on.
Our Solution
Factory-engineered energy storage cables and pre-assembled harnesses, customized to your battery system architecture and delivered with full test documentation.
Energy Storage Cable
Flame-retardant XLPO-insulated DC cables built for high-current, high-temperature battery applications, with flexible layouts and custom lengths for rack-to-rack and rack-to-PCS runs.
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Energy Storage Harness
Factory pre-assembled wiring harnesses for inverter, BMS and battery-module connections, reducing field labor and improving wiring consistency across every rack.
View ProductReliability & Validation
Every SUNKEAN energy storage product is validated before shipment, from electrical performance to safety compliance.
Electrical Performance Testing
Products are 100% electrically tested with documented results covering conductor resistance, continuity, insulation resistance and high-voltage withstand, plus aging and flame performance checks against applicable standards.
Safety & Compliance Validation
Energy storage cables and harnesses are qualified to recognized international standards including TÜV and UL schemes, using flame-retardant XLPO insulation and fully traceable, batch-documented production.
Why Choose SUNKEAN
Advanced Manufacturing Capability
Strict Quality Control
Global Project Experience
FAQ
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How much cost savings can SUNKEAN’s copper-to-aluminum connection solution deliver?
Compared to a full-copper system, this solution reduces costs by up to 58%. In a 1 GW PV power plant project, the savings can exceed USD 2,750,000.
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How is SUNKEAN’s copper-to-aluminum conversion harness designed to ensure stability and safety?
The harness uses a “copper–aluminum–copper” structure: copper conductors on both ends with an aluminum conductor in the middle, plus a plastic connector housing. It supports high currents and allows quick on-site crimping at the aluminum end for simplified installation.
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What welding process is used for the copper-to-aluminum joint, and how reliable is it?
The connection adopts friction welding (solid-state bonding), which operates at low temperatures to minimize thermal damage to the cable. Over 25 years, conductivity degradation is less than 0.5%. The tensile strength is verified through pull and impact testing.
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How does the copper-to-aluminum connector maintain corrosion resistance in harsh environments?
The joint surface is protected by a three-layer gradient structure: diffusion layer, chemical nickel plating layer, and hot-dipped tin anti-oxidation layer. An electroplating hole design ensures uniform coating. In a 96-hour 5% salt spray test, no corrosion occurred in the contact area.