FoxESS - HV-Junction Box-50

The HV-Junction Box-50 is a dedicated FoxESS junction box designed for the most demanding energy storage systems based on EP5 and EP11 batteries. It enables efficient and safe parallel connection of up to four battery sets, allowing for effective increase of the total capacity and flexibility of the entire energy storage system – up to 41.6 kWh. This solution makes system expansion simple, fast, and completely safe, whether for residential, commercial, or agricultural use.

Key product features

• Parallel connection support: The HV-Junction Box-50 allows the installation of up to four EP batteries, enabling step-by-step expansion without compromising safety or functionality.

• Wide compatibility: The device works with FoxESS inverters and EP series systems: EP5, EP6, EP11, EP12, and other compatible FoxESS cells.

• High reliability: Natural cooling and IP65 rating guarantee full protection against dust and water, allowing installation both indoors and outdoors.

• Safe expansion: The HV-Junction Box-50 is essential when you want to expand your system with another battery module while maintaining system consistency and safety.

Model: HV-Junction Box-50

• Compatibility: FoxESS EP5, EP6, EP11, EP12 batteries

• Maximum number of batteries connected in parallel: 4

• Rated voltage: 500 V

• Maximum continuous current: 50 A

• Peak current: 65 A (up to 60 seconds)

• Operating temperature range: -20°C to 70°C

• Cooling method: natural (no active fans)

• Protection rating: IP65 (dust and water resistance — for outdoor and indoor installation)

• Dimensions: 186 × 170 × 78 mm

• Weight: 4.5 kg

• Installation: wall-mounted

Application of HV-Junction Box-50

This solution is recommended for owners of larger photovoltaic installations and energy storage facilities who plan to flexibly expand their infrastructure — both at the design stage and during subsequent operation, when energy demand increases. The HV-Junction Box-50 is an essential component for effectively increasing battery capacity and ensuring the complete reliability of an expanded installation.

Thanks to its compact dimensions, high environmental resistance, and intuitive installation, the product increases the comfort of installation service and guarantees safety of use throughout the entire life cycle of the system. The HV-Junction Box-50 is a key component of any modern, growing FoxESS installation.