Fox ESS ECS4300 4.14kWh High-Voltage Battery Module (Master)
The Fox ESS ECM4300 (part number FE-HV-ECM-4300) is a 4.14 kWh high-voltage lithium iron phosphate (LiFePO₄) master battery module from the Fox ESS ECS Series. The master module includes the system controller and is required in every ECS4300 battery stack. Each module provides 4.14 kWh, scaling up to 29.03 kWh total capacity (1 x Master + 6 x Slaves). With 90% depth of discharge and CAN/RS485 communication, the ECS4300 Master is designed for residential and light commercial energy storage. This is a slave-dependent module; a minimum of 2 modules is required for system operation. Available from DECO Group, a UK-based solar wholesaler for professional trade installers.
Key Technical Details
- Part number: FE-HV-ECM-4300
- Supplier part number: FE-HV-ECM-4300
- Model: ECM4300 (Master)
- Battery chemistry: LiFePO₄
- Nominal energy: 4,145 Wh (4.14 kWh) per module
- Depth of discharge: 90%
- Continuous discharge rate: 2,875 W
- Maximum discharge rate (5 minutes): 2,875 W
- Surge discharge rate (15 seconds): 3,737 W
- Maximum charge rate (5 minutes): 2,875 W
- Communication: CAN / RS485
- Maximum modules per stack: 7 (1 x Master + 6 x Slaves)
- Maximum stack capacity: 29.03 kWh
- Weight: 38.3 kg
Key Features
- 4.14 kWh capacity per module with LiFePO₄ chemistry and 90% usable depth of discharge
- Master module includes the system controller; one is required per stack
- Scalable from a minimum 2-module stack (8.28 kWh) up to 7 modules (29.03 kWh)
- CAN/RS485 communication for system integration and monitoring
- Plug-and-play installation with compact stackable design
- Wide temperature tolerance
- 12-year warranty upon registration with Fox ESS
System Compatibility
- Compatible with Fox ESS high-voltage hybrid inverters and AC charger inverters
- This is the master module and is required in every ECS4300 battery stack
- Minimum configuration: 1 x Master + 1 x Slave (2 modules)
- Maximum configuration: 1 x Master + 6 x Slaves (7 modules, 29.03 kWh)
- When adding modules to a pre-existing Energy Cube stack, new batteries must be compatible with the original modules. Contact your technical support team with a photograph of the existing stack to confirm compatibility.
Installation Notes
- At 38.3 kg, a two-person lift is required
- Stackable modular installation
- Must be installed by a qualified electrician or technician in compliance with local wiring regulations
Warranty
- Standard warranty: 5 years
- Extended warranty: 12 years when the installation is registered with Fox ESS online
Common Questions
Click a question below to reveal the answer.
Can the Fox ESS ECS4300 Master operate on its own?
No. The ECS4300 system requires a minimum of 2 modules: 1 x Master + 1 x Slave.
How many ECS4300 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 29.03 kWh.
What is the difference between the ECS4300 Master and Slave?
The Master module (ECM4300) contains the system controller and is required in every stack. Only one Master is used per stack; additional capacity is added using Slave modules. Both modules provide 4.14 kWh capacity.
Can I add ECS4300 modules to an existing Energy Cube 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.
DECO Group supplies Fox ESS ECS master and slave battery modules alongside compatible hybrid inverters, AC charger inverters, and system accessories. Browse our Fox ESS battery storage catalogue for complete scalable storage system configurations.
About DECO Group
We are a UK-based solar and energy storage wholesaler supplying high-voltage battery modules, hybrid inverters, and installation components to professional installers and electrical contractors. Our Fox ESS ECS range covers all capacity variants with master and slave modules in stock. Visit decogroup.co.uk for the full catalogue.
