
Fox ESS EQ5000 4.92kWh High Voltage Master LiFePO4 Battery Module
The Fox ESS EQ5000 is the master module of the EQ high voltage storage system: it runs the stack and handles the dialogue with the hybrid inverter, over CAN or RS485. In a solar installation it sets aside the energy generated during the day and returns it in the evening, or when the grid goes down.
The master never works alone: a stack needs at least 2 modules, a master plus one slave, and tops out at 6 modules in series — one master and five slaves — for 29.52kWh in total. Mounting is plug and play: modules stack and click together with no wiring to prepare, which cuts installation time.
The cells are lithium iron phosphate with a declared depth of discharge of 90%, and the permitted temperature range is wide. Heated and non-heated versions of the EQ series can share the same system, but if a single battery in the stack does not support heating the function is disabled system-wide. When adding modules to an EQ stack already in service, compatibility with the existing modules must be checked. Installation must be carried out by a qualified electrician or technician.
Key strengths
Technical specifications
| Feature | Value |
|---|---|
| Product code | FE-HV-EQM-5000 |
| Manufacturer | Fox ESS |
| Series | EQ5000 |
| Role in the system | Master module (requires at least one slave) |
| Chemistry | LiFePO4 (lithium iron phosphate) |
| Nominal energy | 4.92kWh |
| Module nominal voltage | 52V |
| Depth of discharge (DoD) | 90% |
| Modules per stack | 2 to 6 (1 master plus 5 slaves) |
| Maximum system capacity | 29.52kWh |
| Communication | CAN, RS485 |
| Length | 0.66m |
| Weight | 50.6kg |