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Fox EQ4800, 4.66kWh HV Battery (Slave)
#2: FE-HV-EQS-4800 Storage Systems - Li-ion Battery Pack
Fox's EQ is a high-performance, scalable battery storage system. Its modular design allows for maximum flexibility. The Fox EQ is suitable for a wide range of storage applications. Additional batteries can be added with a maximum storage capacity of 41.94kWh.
EQ4800 are compatible with ECS-4800 batteries
Fox EQ4800 Datasheet
Fox Product Compatibility
Fox EQ4800 Warranty
Modular Energy Storage Solution for Homes and Small Businesses
The Fox EQ4800 (FE-HV-EQS-4800) is a high-performance lithium-ion battery module designed for scalable high-voltage energy storage systems. With a nominal capacity of 4.66kWh, this slave unit offers seamless integration with other EQ series batteries, enabling expandable storage up to 41.94kWh (1 master + 8 slave units).
Designed for hybrid solar, backup, and off-grid systems, the Fox EQ4800 is ideal for UK homes and commercial applications seeking reliable, modular power storage. Its plug-and-play installation, wide temperature tolerance, and high discharge efficiency make it a trusted choice for installers and system designers.
Key Benefits
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4.66kWh Nominal Capacity
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Modular & Scalable – Expandable up to 41.94kWh (1 master + 8 slaves)
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Wide Temperature Tolerance – Built for UK weather conditions
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Plug & Play Design – Fast, simple installation
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90% Depth of Discharge – Maximised usable capacity
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CAN/RS485 Communication – Reliable and fast system integration
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High Voltage Battery – Compatible with Fox ECS series systems
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Backward Compatible – Works with older ECM/S-4800 models
Please Note: A 2 module minimum is required for operation (1 master + 1 slave). Must be installed by a certified electrician. To active the extended 12-year extended warranty register online with Fox ESS
Technical Specifications
| Specification |
Value |
| Battery Type |
Lithium-Ion (Li-ion) |
| Nominal Energy |
4.66kWh / 4660Wh |
| Rated Power |
4,660W |
| Voltage |
45V |
| Depth of Discharge (DoD) |
90% |
| Continuous Discharge Rate |
2,225W |
| Maximum Discharge Rate (5 min) |
4,450W |
| Surge Discharge Rate (15 sec) |
3,000W |
| Maximum Charge Rate (5 min) |
4,450W |
| Scalability |
Up to 41.94kWh |
| Communication |
CAN/RS485 |
| Weight |
41.5kg |
Why Choose the Fox ESS Cube EQ488 4.66Wh HV Battery?
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Future‑proofing your energy system: If you install a smaller system now but anticipate higher usage (EV charging, home battery backup, increasing self‑consumption of solar), having a system that can grow is a major advantage.
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Cost‑effectiveness: By buying a slave module instead of a whole new standalone system, you’re optimising investment by utilising what you already have and increasing capacity only as needed.
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Less grid dependence: Expanded storage means you can store more of your solar generation (if you have PV), or have more backup capacity during power cuts/peak tariffs.
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Installation efficiency: The simpler install and compatibility reduce labour risk and installation complexity — beneficial both for homeowners and for installers.
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Warranty & support: Products from this family (by Fox ESS) emphasise correct installation and registration to unlock extended warranties (helping buy‑in confidence)
