Product Overview

4mm DC Solar Cable is a flexible single-core photovoltaic cable built for standard DC wiring in solar power systems. It handles module interconnection, string-level routing, and short-to-medium cable runs between panels and DC equipment with ease. Lightweight and easy to route, it remains one of the most widely used cable sizes in residential and small commercial PV construction.

Specifications

Parameter	Specification
Conductor Size	4 mm²
Conductor Material	Tinned copper, multi-stranded
Cable Type	Single-core PV DC cable
Rated Voltage	1000V AC/1500V DC
Insulation	Electron-beam cross-linked halogen-free compound
Outer Sheath	UV-stabilized halogen-free compound
Temperature Range	-40°C-90°C
Flame Performance	Low smoke, halogen-free, flame-retardant
Color	Black, red, or custom
Certification Basis	TUV PV cable standard

Core Uses

4mm cable is the go-to choice for routine solar string wiring. It strikes a practical balance between flexibility, conductivity, and handling convenience, making it a reliable option for installers who work on residential rooftops and compact commercial arrays day after day.

Panel-to-panel connection within a string
String extension and lead wiring
Rooftop array DC-side cabling
Compact PV system interconnection

For projects that prioritize neat routing and easy handling without oversizing the cable, 4mm is often the most practical starting point in the TUV solar cable range.

Application Scenarios

Residential Rooftop Solar

This is where 4mm cable sees the most use. It fits naturally into home rooftop arrays where cable paths are short, current levels are standard, and installers need a cable that routes cleanly around module frames, rails, and mounting hardware without adding unnecessary bulk.

Small Commercial Installations

Carports, small office rooftops, and distributed PV projects with multiple compact strings benefit from the flexibility and manageable weight of 4mm cable. It keeps field wiring fast and tidy in space-constrained layouts.

Off-Grid and Hybrid Systems

In smaller standalone solar setups such as rural homes, monitoring stations, agricultural pumps. 4mm cable provides dependable PV-side wiring between modules, charge equipment, and combiner units. Its outdoor durability supports long-term exposed installation.

Selection Guide

Choose 4mm when the system uses standard string current and cable runs stay within moderate distance. It is a strong fit for residential projects, compact rooftop systems, and module interconnection tasks where easy handling matters most.

If the project involves longer routing, higher current, or a larger string design, stepping up to 6mm or 10mm will provide lower voltage drop and more electrical margin.

FAQ

Q: Is 4mm cable suitable for residential solar systems?

A: Yes. It is one of the most common sizes for home PV wiring, especially for panel interconnection and standard string layout.

Q: Can it be used outdoors for extended periods?

A: Yes. The cable is engineered for outdoor photovoltaic installation and resists UV exposure, weathering, and temperature variation over its service life.

Q: What makes 4mm cable a popular choice?

A: Versatility. It is flexible, lightweight, and covers the majority of standard PV string wiring needs without making the cable routing unnecessarily heavy or rigid.

Packaging

Available in coils, rolls, or drums depending on order quantity and shipping arrangement. Cable marking, color, length, and packaging can be customized for OEM and project supply.