Solar Connecting Wire
There are many varieties, the thickness of the wire can be customized, good thermal conductivity, corrosion resistance, not easy to oxidize, easy to use, and mold opening services and related design services can be provided
Core characteristics and material selection
Conductor material: High-purity electrical copper or tin-plated copper alloy wires are adopted, featuring excellent electrical conductivity, high-temperature resistance (for instance, tin-copper alloys can withstand temperatures up to 125℃), and corrosion resistance. They are particularly suitable for long-term outdoor exposure scenarios.
Insulation and sheath: Made of cross-linked polyethylene (XLPE), low smoke zero halogen flame-retardant polyolefin or fluoroplastic materials, it features weather resistance (UV resistance, cold resistance from -40 ° C to high temperature resistance from 120 ° C), flame retardancy (passed IEC60332-3 beam burning test, low smoke density, light transmittance > 50%), chemical corrosion resistance (acid and alkali resistance, salt spray resistance) and anti-aging performance. Some models adopt a double-layer insulation design to enhance water resistance and ozone resistance.
Thermal conductivity optimization: Enhance heat dissipation efficiency through thermoplastic elastomers such as PPO/TPU/TPEE and silane cross-linking technology. Combined with high-temperature resistant sheath materials (such as XLPE with a temperature resistance of 125℃), ensure stable operation in high-temperature environments.
Specification customization and selection logic
Wire diameter selection: Calculated based on power, current and line loss. For example, a 300W/18V solar panel requires a current of 16.7A and is suitable for a 2.5mm² cable. For 500-1000W systems or long distances (10-20 meters), 4-6mm² cables are recommended. For systems exceeding 1000W or special scenarios, cables of 10mm² or more are required to reduce voltage drop (controlled within 5% to 10%) and power loss.
Model compatibility
DC cables (such as PV1-F, H1Z2Z2-K) : They are used for series connection of components, series and parallel connection of groups, and connection of DC distribution boxes. They support DC 1.8kV voltage and have strong weather resistance.
Ac cables (such as PV-YJYJ, GFDC-YJVB) : Used for connection from inverters to power grids/users, they comply with AC standards of 0.6/1kV or higher.
Busbar cable: Multi-core parallel or armored structure, suitable for high current transmission requirements from the busbar box to the inverter.
Customized services and mold opening design
Customization options: Supports customization of cable length (1.5 meters to tens of meters), interface type (MC4, MC3, circular /D-Sub connectors), terminal specification (such as 5557-2*1P), and protection level (IP67 and above). It can integrate functional modules such as lightning protection, anti-interference and magnetic rings, and is suitable for large-scale systems in residential, commercial and public utilities.
Mold opening and design: We offer professional mold opening services for connectors and wire harness structures (such as horizontal injection molds, with core material S136), supporting 2D/3D drawing import to ensure precision and compatibility. Engineering verification includes prototype making, electrical overload testing, environmental stress testing and fire resistance testing, in compliance with standards such as TUV, UL, IEC 62930 and GB/T 31840.
Application scenarios and installation key points
Typical applications: Photovoltaic power stations (series/parallel connection between modules, inverter connection), distributed generation systems (household/commercial rooftops), energy storage systems (battery and inverter connection), and special environments (coastal areas with high salt fog, cold/hot regions).
Installation specifications: Direct burial should be avoided (except for armored cables). Cable troughs, pipes or overhead wiring should be preferred. Ensure that the connectors are waterproof and sealed (such as heat shrink tubing protection), and regularly check for cable wear, insulation aging and connection tightness. Outdoor installation requires consideration of UV protection, mechanical damage prevention and temperature compensation (such as adjusting the charging voltage of lead-acid batteries).
Certification and safety standards
International certifications: TUV (Europe), UL (North America), IEC 62930 (International), CE (EU) and Chinese GB/T 31840 standards, ensuring electrical performance, flame retardancy, weather resistance and environmental compliance (RoHS, lead/cadmium-free).
Safety design: It is equipped with overcharge/overdischarge protection, temperature compensation, lightning protection and short-circuit protection functions, complies with the net metering policy requirements, and supports bidirectional meter integration and smart grid connection.
