Fox ESS EQ4800-L9 41.93kWh High-Voltage Battery Full Stack (1 x Master + 8 x Slave)
The Fox ESS EQ4800-L9 (package part number FE-HV-EQ-9-4.8-43.2) is the maximum 9-module high-voltage LiFePO₄ battery configuration, comprising 1 x EQ4800 Master (FE-HV-EQM-4800) and 8 x EQ4800 Slave (FE-HV-EQS-4800). This full stack delivers 41.93 kWh of nominal storage at 90% depth of discharge with a stack voltage of 403 V. This is the maximum single-stack capacity for the EQ4800 platform. Backward compatible with the predecessor ECM/S-4800 battery range. Compatible with Fox ESS hybrid inverters and AC charger inverters. For higher total capacity, inverters with dual battery inputs (such as the H3 Pro) can connect two full stacks. Available from DECO Group, a UK-based solar trade wholesaler.
Package Contents
- 1 x Fox ESS EQ4800 4.66 kWh HV Battery Master (FE-HV-EQM-4800)
- 8 x Fox ESS EQ4800 4.66 kWh HV Battery Slave (FE-HV-EQS-4800)
Stack Specifications (9-Module Full Stack)
- Battery chemistry: LiFePO₄ (LFP)
- Total nominal capacity: 41,930 Wh (41.93 kWh)
- Nominal stack voltage: 403 V
- Depth of discharge: 90%
- Continuous discharge rate: 2,240 W
- Maximum discharge rate (5 minutes): 4,480 W
- Surge discharge rate (15 seconds): 5,785 W
- Maximum charge rate (5 minutes): 4,480 W
- Communication: CAN / RS485
- Dimensions (9-module stack): 570 x 1,352 x 380 mm (W x H x D)
- Net weight: 376.5 kg
Key Features
- 41.93 kWh total capacity: the maximum single-stack configuration for the EQ4800 platform
- 9 x LiFePO₄ modules with 90% usable depth of discharge
- Pre-configured full stack with master module included for immediate installation
- High stack voltage of 403 V for efficient power delivery
- Backward compatible with the predecessor ECM/S-4800 battery range
- CAN/RS485 communication for system integration
- Plug-and-play stackable design
- 12-year warranty upon registration with Fox ESS
System Compatibility
- Compatible with Fox ESS H1, H1-G2, KH, H3 Smart, H3, and H3 Pro hybrid inverters and AC charger inverters
- This is the maximum single-stack configuration (1 x Master + 8 x Slaves). For higher total capacity, inverters with dual battery inputs (such as the H3 Pro) can connect two full stacks for up to 83.86 kWh.
- Backward compatible with ECM/S-4800 battery systems
Installation Notes
- Total net weight: 376.5 kg. Individual modules weigh 41.5 kg (Slave) and 44.5 kg (Master); two-person lift required per module
- Stack dimensions: 570 x 1,352 x 380 mm (W x H x D). At 1,352 mm tall, ensure adequate ceiling height at the installation location.
- 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.
Is this the maximum capacity for a single EQ4800 stack?
Yes. 9 modules (1 x Master + 8 x Slaves) at 41.93 kWh is the maximum single-stack configuration. For higher total capacity, inverters with dual battery inputs (such as the Fox ESS H3 Pro) can connect two full stacks for up to 83.86 kWh.
Is a master module included in this package?
Yes. This package includes 1 x EQ4800 Master and 8 x EQ4800 Slave modules, forming a complete full stack ready for installation.
What inverters are compatible with this battery stack?
This stack is compatible with Fox ESS H1, H1-G2, KH, H3 Smart, H3, and H3 Pro hybrid inverters and AC charger inverters.
What is the total weight and height of this battery stack?
The 9-module full stack weighs 376.5 kg net and stands 1,352 mm tall (570 x 1,352 x 380 mm). Individual modules must be lifted separately; two-person lift required per module.
DECO Group supplies Fox ESS EQ4800 battery stacks in every configuration from 2 to 9 modules alongside compatible hybrid inverters, AC charger inverters, and system accessories. Browse our Fox ESS battery storage catalogue for pre-configured stacks and individual modules.
About DECO Group
We supply Fox ESS high-voltage battery stacks, hybrid inverters, and balance-of-system components to professional installers and electrical contractors across the UK. Our EQ4800 range covers every stack size from 9.32 kWh to 41.93 kWh, with dual-stack configurations available for inverters with twin battery inputs. Visit decogroup.co.uk for the full catalogue.
