Fox ESS EQ2900 2.88kWh High-Voltage Battery Module (Slave)
The Fox ESS EQ2900 Slave (part number FE-HV-EQS-2900, supplier part number FE-EQ2900-S) is a 2.88 kWh high-voltage lithium iron phosphate (LiFePO₄) battery module designed as a slave unit within the Fox ESS EQ storage platform. The modular, stackable design allows up to six slave modules to be added to a single master unit, scaling total system capacity to 20.16 kWh. With a 90% depth of discharge, CAN/RS485 communication, and plug-and-play installation, the EQ2900 is suited to residential and light commercial energy storage systems paired with Fox ESS high-voltage hybrid inverters. This is a slave module only and cannot operate independently; a master module is required. Available from DECO Group, a UK-based solar wholesaler for professional trade installers.
Key Technical Details
- Part number: FE-HV-EQS-2900
- Supplier part number: FE-EQ2900-S
- Model: EQS2900 (Slave)
- Battery chemistry: Lithium iron phosphate (LiFePO₄)
- Nominal energy: 2,880 Wh (2.88 kWh)
- Nominal voltage: 115.2 V per module
- Depth of discharge: 90%
- Round-trip efficiency: greater than 95%
- Continuous discharge rate: 1,440 W
- Maximum discharge rate (5 minutes): 2,880 W
- Surge discharge rate (15 seconds): 3,000 W
- Maximum charge rate (5 minutes): 2,880 W
- Communication: CAN / RS485
- Ingress protection: IP65
- Weight: 33 kg
Key Features
- 2.88 kWh capacity per module with 90% usable depth of discharge
- LiFePO₄ chemistry for stable, safe, long-life energy storage
- Scalable from a minimum 2-module stack (5.76 kWh) up to 7 modules (20.16 kWh)
- High-voltage architecture for reduced losses and improved system efficiency
- Round-trip efficiency greater than 95%
- Plug-and-play installation with simple buckle-fixing stackable design
- CAN/RS485 communication for stable system integration
- Wide operating temperature tolerance
- IP65 rated for indoor or outdoor installation when correctly mounted
System Compatibility
- Compatible with Fox ESS high-voltage hybrid inverters and AC charger inverters
- This is a slave module only. A master module (EQ2900 Master) is required for system operation.
- Single-phase minimum configuration: 1 x Master + 1 x Slave
- Three-phase minimum configuration: 1 x Master + 2 x Slaves
- Maximum configuration: 1 x Master + 6 x Slaves (7 modules total, 20.16 kWh)
- When adding modules to a pre-existing stack, new batteries must be compatible with the original battery modules. Contact your technical support team with a photograph of the existing stack to confirm compatibility.
Installation Notes
- At 33 kg per module, a two-person lift is required
- Stackable modular design with plug-and-play buckle fixing
- IP65 rated for indoor or outdoor stand-mounted installation
- Must be installed by a qualified electrician or technician in compliance with local wiring regulations
Warranty
- Standard warranty: available upon installation
- Extended warranty: 12 years when registered with Fox ESS online
Common Questions
Click a question below to reveal the answer.
Can the Fox ESS EQ2900 Slave operate on its own?
No. This is a slave module only. A master module (EQ2900 Master) is required. The minimum system configuration is 1 x Master + 1 x Slave for single-phase, or 1 x Master + 2 x Slaves for three-phase.
How many Fox ESS EQ2900 modules can be installed in one stack?
A maximum of 7 modules per stack (1 x Master + 6 x Slaves), giving a total capacity of 20.16 kWh.
What is the battery chemistry of the Fox ESS EQ2900?
The EQ2900 uses lithium iron phosphate (LiFePO₄) chemistry with a 90% depth of discharge and round-trip efficiency greater than 95%.
Can I add EQ2900 modules to an existing Fox ESS battery stack?
Yes, but new modules must be compatible with the original battery stack. Contact your technical support team with a photograph of the existing stack to confirm compatibility before ordering.
Can the Fox ESS EQ2900 be installed outdoors?
Yes. The EQ2900 is IP65 rated and can be installed indoors or outdoors when correctly mounted.
DECO Group supplies Fox ESS EQ2900 master and slave battery modules alongside compatible high-voltage hybrid inverters, AC charger inverters, and all associated system accessories. Browse our Fox ESS battery storage catalogue for complete scalable energy storage system components.
About DECO Group
We are a UK-based solar and energy storage wholesaler supplying high-voltage battery modules, hybrid inverters, and balance-of-system components to professional installers and electrical contractors. Our Fox ESS range covers the full EQ battery platform with master and slave modules, compatible inverters, and installation hardware. Visit decogroup.co.uk for the full catalogue.
