Pylontech 125A DC 250V battery box with automatic fuse + cables

Battery Box with Pylontech 125 A DC 250 V Automatic Fuse + Cable

This Pylontech 125 A DC 250 V fuse box is specially designed to safeguard your lithium battery bank connected to a solar system. Thanks to its Class T automatic fuse, it reacts quickly to overcurrent and protects your modules in the event of a short circuit. Its robust, ready-to-install box includes insulated terminals, screws and cable ducts to facilitate installation. Ideal for installations from 96 V to 250 V, it ensures a longer battery life whilst offering great ease of use. Compatible with Pylontech panels, inverters and batteries.

Benefits

• Optimal safety: protection against overloads, short circuits and fire risks
• Photovoltaic compatibility: designed for Pylontech 125 A batteries up to 250 V DC
• Easy installation: ready-to-fit box with +/– terminals, screws and cable ducts included
• Reliable performance: Class T automatic fuse for rapid response to overcurrent

Contents of the box:

1x 125A DC250V automatic fuse

• Number of poles: 1
• Rated current: 125A
• Breaking capacity: 4kA
• Certification: CE, ISO9001

1x Pair ofPylontech battery connection cables

Pylontech battery connection cables

This cable set is designed to connect Pylontech US2000, US3000C and US5000 batteries to an inverter.

It comprises:

• 2 x 2-metre power cables (25 mm² cross-section)
• Connectors: 2 Amphenol plugs + 2 M8 terminals

It ensures a safe, high-performance and durable connection, ideal for residential or commercial energy storage systems.

Power cable sizing

The sizing of the power cable for this battery cabinet is essential to ensure both the safety and performance of your installation. This cabinet, equipped with 125 A DC protection, is supplied with 25 mm² cables, a cross-section perfectly suited for standard use over a short distance (approximately 2 metres). This configuration allows the nominal current to be carried whilst minimising losses.

However, in the case of an installation with a greater distance between the batteries and the inverter, it is recommended to increase the cable cross-section to limit voltage drop, which is particularly critical in low-voltage DC (48 V). As a guide, a 35 mm² cross-section is recommended for distances exceeding 3 to 5 metres, and 50 mm² for longer lengths or high-power installations (multiple batteries or high-capacity inverters).

A correctly sized cable not only prevents overheating but also optimises the overall efficiency of your storage system. If in doubt, it is recommended that you have the sizing verified by a professional or base your calculations on the full specifications of your installation.

To help you with the sizing of your installation, you can use our online voltage drop calculator; our team is also available to answer any questions or carry out checks via info@wattuneed.com.