Fox ESS HV Junction Box for Paralleling up to 4 EP Series Batteries

Fox ESS HV Junction Box for Paralleling up to 4 EP Series Batteries is a dedicated high-voltage combiner unit for Fox ESS EP series batteries. It allows up to four EP high-voltage battery modules to be connected in parallel to a single compatible Fox ESS hybrid or AC inverter, making it easy to scale storage capacity for larger residential or light-commercial solar systems.

Fox ESS HV Junction Box Key Features

• Supports up to 4 EP batteries in parallel – designed for high-voltage Fox ESS EP series batteries, enabling 4-way parallel connection on a single inverter battery port.
• Scalable storage up to ~40–41.4kWh – when used with compatible EP batteries, the HV Junction Box allows larger banks (for example, multiple EP6 or EP12 modules) to be combined for higher total capacity.
• High-voltage design – suitable for Fox ESS high-voltage storage systems, matching the operating voltage of the EP series and compatible PCS (inverters).
• IP65-rated enclosure – weather‑resistant housing suitable for indoor plant rooms or suitably sheltered outdoor installations.
• Easy installation – wall-mountable enclosure supplied with fixing hardware, DC power cables and ground cable for quick, neat installation alongside the batteries and inverter.
• Dedicated connection terminals – clearly labelled BAT+ / BAT– and PCS+ / PCS– terminals for battery and inverter side connections, plus a dedicated earth/ground terminal.
• Fox ESS ecosystem accessory – designed and approved by Fox ESS for use with EP series batteries and Fox high-voltage hybrid and AC inverters.

Typical Applications

• Expanding Fox ESS EP battery banks – required when connecting more than one EP high-voltage battery (for example EP6 Plus or EP12) in parallel to a compatible inverter.
• Larger residential systems – ideal where total storage of 15–40kWh is needed for big homes, electric vehicle charging, heat pumps or high evening loads.
• Light-commercial installations – supports scalable storage for small businesses, workshops, offices and community buildings using Fox ESS systems.

Technical Highlights

• Product type: Fox ESS high-voltage battery junction box (HV-Junction Box).
• Battery connections: up to 4 x EP series high-voltage battery towers in parallel per junction box.
• PCS (inverter) connection: single high-voltage DC output to the battery interface of the compatible Fox ESS inverter.
• Scalability: system energy scalable up to around 40–41.4kWh depending on the EP battery model used.
• Ingress protection: IP65 enclosure.
• Mounting: wall-mounted, with four fixing points and supplied expansion plugs/screws (per datasheet).
• Approximate weight: around 4.5kg.

Important Installation Information

• Installation and wiring must be carried out by qualified, authorised personnel familiar with high-voltage DC battery systems and Fox ESS installation manuals.
• Ensure correct polarity for BAT+ / BAT– and PCS+ / PCS–, and always follow Fox ESS wiring diagrams for the specific EP battery and inverter combination.
• Maintain clearances around the junction box for ventilation and access; avoid locations with excessive dust, moisture or flammable gases.
• All DC circuits must be safely isolated before installation or maintenance, and all grounding/earthing connections must be correctly completed.