25mm² Full Gauge Pure Copper Battery Cable

Product Description

The 25mm² Pure Copper Flexible DC Cable is a high-quality, full-gauge battery cable designed for high-current DC power applications. Made from pure copper conductors, this cable offers excellent electrical conductivity, flexibility and reliable current transfer.

Its flexible construction makes it easy to route and install inside LiFePO4 battery packs, battery cabinets, solar systems, inverter systems, UPS systems and EV applications.

The 25mm² cross-sectional area provides a strong current-carrying capability while maintaining flexibility for professional battery installations.

Key Features

25mm² Full Gauge

100% Pure Copper Conductor

Highly Flexible Construction

Excellent Electrical Conductivity

Low Electrical Resistance

Suitable for High-Current DC Applications

Suitable for LiFePO4 Batteries

Suitable for Solar Systems

Suitable for Inverter Batteries

Suitable for UPS Systems

Suitable for Battery Cabinets

Suitable for EV Battery Applications

Easy to Route and Install

Suitable for Battery Terminals and DC Connections

Designed for Professional Battery Assembly

Technical Specifications

Specification Details

Cable Type Flexible DC Battery Cable

Conductor Material Pure Copper

Cable Size 25mm²

Gauge Full Gauge

Construction Multi-Strand Flexible Copper

Application DC Battery & Power Systems

Polarity Suitable for Positive & Negative DC Connections

Battery Chemistry LiFePO4 & Other Compatible Battery Systems

Applications Solar, Inverter, UPS, EV & Energy Storage

Note: Actual allowable current depends on cable length, insulation temperature rating, ambient temperature, installation method, bundling and permissible voltage drop. The BMS, fuse and terminals should always be selected according to the complete system.

Where Can 25mm² Cable Be Used?

🔋 12V LiFePO4 Batteries

25mm² cable is suitable for many 12V LiFePO4 battery applications, particularly battery systems using approximately 100A-class BMS/load levels, subject to cable length and installation conditions.

For example:

12.8V 100Ah LiFePO4 Battery

12.8V 200Ah LiFePO4 Battery

For very high-current 12V systems or long cable runs, a larger cable may be preferable.

⚡ 24V LiFePO4 Batteries

25mm² copper cable can be useful for 24V battery systems, where the required current and cable length are within the cable's permissible operating limits.

Examples:

24V 100Ah LiFePO4

24V 200Ah LiFePO4

24V 314Ah LiFePO4

The actual cable size should be selected based on the inverter/load current and cable length, rather than battery Ah capacity alone.

🔋 48V / 51.2V LiFePO4 Batteries

Because higher-voltage systems require less current for the same power, 25mm² cable can be useful in many 48V/51.2V battery applications.

Examples:

51.2V 100Ah

51.2V 200Ah

51.2V 314Ah

For high-power inverters, cable sizing should be calculated according to the maximum DC current and cable run.

Example: 5kW Inverter

For a 51.2V battery system:

5000W ÷ 51.2V ≈ 98A

Therefore, a 25mm² copper cable can be a practical choice for some 5kW-class 51.2V systems when the cable length, installation and protection are appropriately designed.

For larger inverters, the required current increases and a larger cable may be required.

Example: 8kW Inverter

For a 51.2V system:

8000W ÷ 51.2V ≈ 156A

At this current level, cable selection becomes particularly dependent on length, insulation rating, ambient temperature and installation method. A larger conductor or parallel cables may be appropriate rather than automatically using a single 25mm² cable.

Why Pure Copper?

Pure copper provides excellent electrical conductivity compared with many alternative conductor materials.

Benefits include:

Low electrical resistance

Efficient power transfer

Reduced voltage drop

Better suitability for high-current DC applications

Good flexibility when constructed with fine strands

Reliable battery-terminal connection

Flexible Multi-Strand Construction

The cable uses a flexible multi-strand construction rather than a rigid solid conductor.

This makes it easier to:

Bend around battery terminals

Route inside battery cabinets

Connect BMS terminals

Connect inverter terminals

Install inside compact battery boxes

Manage positive and negative DC wiring

This is particularly useful when building custom LiFePO4 battery packs.

Suitable LiFePO4 Battery Applications

25mm² pure copper cable can be used in battery systems such as:

12V 100Ah LiFePO4

12V 200Ah LiFePO4

24V 100Ah LiFePO4

24V 200Ah LiFePO4

24V 314Ah LiFePO4

48V / 51.2V 100Ah LiFePO4

48V / 51.2V 200Ah LiFePO4

48V / 51.2V 314Ah LiFePO4

However, the Ah rating does not determine cable size by itself. The correct cable depends primarily on the maximum current, cable length and allowable voltage drop.

Ideal Applications

☀️ Solar Battery Systems

For connecting LiFePO4 batteries to compatible solar inverters and DC equipment.

⚡ Inverter Systems

Suitable for battery-to-inverter connections when the required current is within the cable's rated capability.

🔋 Battery Packs

Useful for connecting battery terminals, BMS and high-current DC components.

🏠 Home Backup

Suitable for residential LiFePO4 backup systems.

🏢 Commercial Energy Storage

Can be used in appropriately designed battery cabinets and energy-storage systems.

🚗 EV Applications

Can be used for suitable low-voltage/high-current EV battery wiring, provided the cable's current and thermal requirements are met.

Installation Recommendations

For safe and reliable installation:

Use appropriately rated lugs/terminals.

Use a properly sized DC fuse or breaker.

Keep cable runs as short as practical.

Avoid sharp bends that can damage insulation.

Ensure terminals are properly crimped.

Make sure terminal connections are tight.

Avoid exceeding the cable's allowable temperature.

Select cable size according to actual current and voltage-drop requirements.

Important

25mm² cable should not be selected solely because a battery is 100Ah, 200Ah or 314Ah. The maximum continuous current, peak current, cable length and installation conditions must be considered.

Recommended Uses by Battery

Battery System 25mm² Cable Suitability

12.8V 100Ah ✅ Suitable for many ~100A-class applications

12.8V 200Ah ✅ Depends on BMS/load current

25.6V 100Ah ✅ Suitable for many applications

25.6V 200Ah ✅ Depends on current & cable length

25.6V 314Ah ✅ Depends on inverter/load current

51.2V 100Ah ✅ Very suitable for many applications

51.2V 200Ah ✅ Depends on system current

51.2V 314Ah ✅ Depends on system current

High-power 48V/51.2V systems ⚠️ Calculate cable size before installation

Package Includes

1 × 25mm² Pure Copper Flexible DC Battery Cable

Available for Positive (+) and Negative (−) battery connections.

Important Note

Current-carrying capacity is installation-dependent. For professional battery systems, always size the cable together with the BMS, fuse/breaker, terminal, inverter current, cable length and voltage-drop requirement.