
Fox EQ4800, 4.66kWh HV Battery (Slave)
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Fox ESS EQ4800 4.66kWh High Voltage Battery Module
The Fox ESS EQ4800 4.66kWh High Voltage Battery Module (Slave) is an expandable lithium battery unit designed for use with Fox ESS high voltage energy storage systems. This additional battery module increases the overall storage capacity of compatible Fox ESS battery systems, allowing installers to build larger solar storage solutions to match different energy requirements.
The EQ4800 is supplied as a slave battery module and must be installed alongside a compatible Fox ESS EQ series master battery module and compatible Fox ESS high voltage inverter system. The master battery manages system communication, while additional EQ4800 slave modules provide increased energy storage capacity.
How Fox ESS EQ Battery Systems Work
Fox ESS EQ battery systems use a modular master and slave configuration. A complete battery installation requires the correct combination of master and additional slave battery modules.
- Master Battery Module: Acts as the primary control unit, managing battery communication and system operation.
- EQ4800 Slave Battery Module: Adds additional storage capacity to increase the total available energy.
Multiple EQ4800 slave modules can be combined with the required master battery module to create a larger high voltage battery storage system, making the solution suitable for properties with higher energy consumption or future expansion requirements.
Expandable Fox ESS High Voltage Battery Storage
Each Fox ESS EQ4800 module provides 4.66kWh of usable battery storage capacity. By adding additional battery modules, the system can be expanded to provide significantly greater storage capacity without replacing the existing equipment.
- 4.66kWh usable capacity per EQ4800 module
- Modular master and slave battery architecture
- Expandable storage system up to 41.94kWh
- Designed for Fox ESS high voltage inverter compatibility
- Ideal for residential solar PV battery storage upgrades
Important Compatibility Information
The Fox ESS EQ4800 is an additional battery module and cannot operate as a standalone battery. A compatible Fox ESS master battery module, battery management system and high voltage inverter are required for a complete working installation.
Before purchasing, installers should confirm the required number of master and slave battery modules based on the desired system capacity and inverter compatibility.
Delivery times vary by region:
- UK — 1-2 business days
- Highlands & Islands — 1-2 business days
Returns accepted within 14 days of delivery for unused items in original packaging.

