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Explore our core product range — purpose-built for solar panel array wiring applications
Technical advantages that make dead soft copper wire indispensable in modern photovoltaic systems
Dead soft annealing achieves ≥99.9% pure copper conductivity (IACS ≥100%), minimizing resistive losses across solar array strings and maximizing energy harvest from every panel.
The annealing process eliminates work-hardening, giving dead soft copper wire unmatched bend radius tolerance — critical for routing cables through tight conduit paths in rooftop and ground-mount solar arrays.
Solar installations operate under continuous thermal cycling. Dead soft copper wire maintains structural integrity from -40°C to +200°C, resisting fatigue cracking at junction boxes and combiner connections.
High-purity dead soft copper resists oxidation in outdoor PV environments. Tin-plated variants further extend service life in coastal, humid, and high-UV solar farm conditions.
Soft copper wire strands compress uniformly during crimping, forming gas-tight, low-resistance connections at MC4 connectors, combiner boxes, and inverter terminals in solar installations.
Available from fine AWG 30 to heavy AWG 2/0, dead soft copper wire accommodates string wiring, trunk cables, and DC bus connections in residential, commercial, and utility-scale solar projects.
Dead soft copper wire is at the heart of the world's fastest-growing energy sector
How evolving solar technology is shaping demand for high-performance dead soft copper wire
As utility-scale solar farms scale to gigawatt capacities, the demand for bulk dead soft copper wire for DC string wiring, combiner boxes, and inverter connections has surged. Procurement managers increasingly specify dead soft copper for its consistent elongation and conductivity across large cable runs exceeding several kilometers.
Residential and commercial rooftop PV installations require flexible, easy-to-route wiring solutions. Dead soft copper wire's superior bendability makes it the preferred choice for installers navigating rafters, conduit bends, and tight junction box spaces in retrofit and new-build solar projects.
The integration of battery energy storage systems (BESS) with solar arrays demands high-flex, high-current dead soft copper wire for DC bus connections. Repeated charge-discharge cycles create thermal and mechanical stress that only fully annealed copper can reliably withstand over 25+ year system lifetimes.
Floating solar (floatovoltaics) installations on reservoirs and offshore platforms represent a fast-growing niche. These environments demand tinned dead soft copper wire with enhanced corrosion resistance for underwater conduit routing and wave-induced mechanical flexing.
Solar panel manufacturers use dead soft copper wire in automated tabbing and stringing machines. The wire's consistent softness and elongation characteristics are critical for high-speed soldering processes that connect solar cells into strings within photovoltaic modules.
Solar developers and EPCs are increasingly specifying ISO-certified, RoHS-compliant dead soft copper wire as part of ESG and green supply chain commitments. Xingma's ISO9001 and ISO14001 certifications align with these global procurement requirements.
From cell-level interconnections to grid-tie inverter cables — a complete technical breakdown
Inside every solar panel, dead soft copper ribbon wire connects individual solar cells in series strings. The wire must be ultra-soft (Vickers hardness <65 HV) to withstand thermal expansion cycling without cracking solder joints. Xingma produces precision flat copper wire and stranded copper wire in exact dimensions for automated tabbing equipment used by tier-1 solar module manufacturers.
Between solar panels in a string, dead soft copper wire carries DC current at voltages up to 1500V in utility-scale systems. The wire must flex during wind-induced panel movement and thermal expansion. Stranded dead soft copper wire with XLPE or PV-rated insulation provides the required combination of flexibility and UV/weather resistance for outdoor string wiring.
String cables terminate at DC combiner boxes where dead soft copper wire must be crimped reliably to fuse holders and bus bars. The wire's uniform strand compression during crimping ensures consistent contact resistance, preventing hot spots that could cause arc faults in high-voltage DC systems.
High-current DC cables connecting combiner boxes to string or central inverters require large-gauge dead soft copper wire (AWG 2 to 4/0). Flexibility is essential for routing through cable trays and conduit in large solar plants. Dead soft copper's low resistivity minimizes I²R losses on these critical high-current runs.
Solar array grounding systems use bare dead soft copper wire for equipment grounding conductors (EGC) and grounding electrode conductors (GEC). The wire's formability allows clean bends around structural steel while maintaining electrical continuity for personnel safety and lightning protection.
Inside solar inverters and step-up transformers, dead soft copper braided wire and flat flexible connectors bridge vibrating components to fixed bus bars. Xingma's flexible copper braid connectors are specifically engineered for these high-current, high-vibration internal connections in power conversion equipment.
Unlike hard-drawn or half-hard copper wire, dead soft copper wire undergoes a full annealing process that recrystallizes the copper grain structure. This eliminates internal stresses, reduces hardness to its minimum, and maximizes elongation to 30–40%. In solar installations, this means the wire can be repeatedly bent, routed, and terminated without cracking — directly reducing installation time, material waste, and long-term maintenance costs in PV systems designed for 25–30 year operational lifetimes.
Dead soft copper wire powering diverse industrial and renewable energy sectors
Established in 2019 and headquartered in Liushi — China's capital of electrical appliances — Zhejiang Xingma Co., Ltd. is a leading manufacturer of metal products, wire and cable processing, and related import/export services. Our operations are built around modern enterprise mechanisms and high-efficiency mechanical automation.
Our leading products include dead soft copper wire, copper braided wire, copper stranded wire, soft copper stranded wire, brush wire, carbon brush wire, soft connection series products, and metal stamping parts. These products are best-selling both domestically and internationally, deeply trusted by customers in the solar energy, automotive, communications, and heavy industry sectors.
Industrial-scale production capacity ensuring consistent quality for solar panel array wiring projects
Zhejiang Xingma Copper Industry Co., Ltd. operates a factory building with a construction area of more than 10,000 square meters and employs more than 100 skilled workers. The facility houses more than 300 domestic top-level manufacturing machines, including:
With an annual production capacity exceeding 2,000 tons, Xingma is fully equipped to fulfill large-volume orders for dead soft copper wire for solar panel array wiring projects of all scales.
Building trust through quality, compliance, and responsible manufacturing
Zhejiang Xingma Copper Industry Co., Ltd. abides by the Universal Declaration of Human Rights and major United Nations conventions, respects human and labor rights, opposes discrimination and harassment, respects each other, and is brave and determined to achieve and surpass itself. Relying on the manufacturing industry and taking scientific and technological innovation as the concept, we vigorously expand related industries and gradually develop and expand.
Passed ISO9001 quality system certification and ISO14001 environmental management system certification in 2020. In 2021, it won the Star Enterprise and Excellent Production Enterprise awards. Xingma is a member unit of the Zhejiang Cable Accessories Industry Association and a member unit of the China Forging Association.
Factory-direct copper wire and flexible connection products — all suitable for solar panel array wiring applications
Contact Zhejiang Xingma Copper Industry Co., Ltd. for factory-direct pricing, technical specifications, and custom dead soft copper wire solutions for your solar project.
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