Description
The Fox ESS EP5 is a 5.18kWh high-voltage lithium battery designed for scalable, efficient, and low-maintenance residential storage. With support for up to four units in parallel, the EP5 offers flexible storage from 5.18kWh to 20.8kWh — ideal for hybrid and AC-coupled setups. Each module includes an integrated warming circuit to ensure reliable charging even in colder environments.
Why Choose This Product?
- Modular expansion: Scale from 5.18kWh to 20.8kWh using up to four EP5 modules
- Cold climate ready: Built-in warming function prevents low-temp charge faults
- Installer-friendly: Compact housing, plug-and-play wiring, and easy bracket mounting
- Durable cells: Over 6000 cycles at 90% DoD using high-quality LiFePO₄ chemistry
- Efficient charging: >95% round-trip efficiency and 0–55°C operating range
- Seamless integration: Communicates via CAN with Fox ESS H1, H3, KH, and US inverter lines
Performance and Build
Each EP5 module delivers a true 4.66kWh usable capacity (5.18kWh @ 90% DoD), with a rated voltage of 192V. It supports ambient operation from –10°C to 55°C, and charges from 0°C upwards with help from the integrated battery warming system. Passive natural convection cooling ensures maintenance-free reliability without fans or moving parts.
Installation and Integration
Designed for both wall and floor mounting, the EP5 can be installed in a wide range of domestic spaces including utility rooms, garages, and plant enclosures. Its IP65-rated housing protects against dust and moisture, while a plug-and-play terminal layout speeds up deployment. The system connects directly to Fox inverters via CAN and supports remote diagnostics via inverter-linked platforms.
Who is it for?
- Installers: Looking for stackable 5kWh-class batteries compatible with Fox inverters
- Homeowners: With solar arrays up to 10kW needing modular storage
- Colder climates: Properties where low winter temperatures would normally hinder charging
Technical Specifications
| Model | EP5 |
|---|---|
| Nominal Energy | 5.18kWh |
| Usable Energy | 4.66kWh (90% DoD) |
| Expandable Capacity | Up to 20.8kWh (4 units) |
| Nominal Voltage | 192V |
| Voltage Range | 174V – 219V |
| Cycle Life | >6000 cycles |
| Round-Trip Efficiency | >95% |
| Cooling | Natural convection |
| Fire Protection | Integrated fire suppression |
| Temperature Range | Charge: 0 – 55°C / Discharge: –10 – 55°C |
| Ingress Protection | IP65 |
| Mounting | Wall or floor |
| Communication | CAN |
| Dimensions (W×H×D) | 566 × 400 × 221 mm |
| Weight | 44kg |
Compatible Inverters
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