Fox ESS EQ5000 4.92kWh Master Battery – EQ5000-M

Build a compact, scalable high-voltage storage system with the Fox ESS EQ5000 4.92kWh Master Battery. Designed for compatible Fox ESS hybrid and AC-coupled inverters, the EQ5000 uses safe lithium iron phosphate (LiFePO₄) battery chemistry in a modular, floor-standing design.

The EQ5000-M Master combines a 4.92kWh battery module with the system controller / Battery Management System required to manage a conventional EQ5000 battery stack. EQ5000-S Slave batteries are added in series to increase voltage and storage capacity.

Important: The EQ5000-M cannot operate as a standalone 4.92kWh battery. A conventional EQ5000 stack requires 1x Master and at least 1x Slave, providing a minimum nominal capacity of 9.84kWh.

PowerQ distinction: Do not order this Master for a Fox ESS PowerQube / PQ1 all-in-one system. PowerQ / PQ1 systems use 2-6 EQ5000-S Slave batteries directly beneath the inverter, without a separate EQ5000-M.

Compatibility: EQ5000 system size depends on the connected Fox ESS inverter. Always check the exact inverter model, firmware and current Fox ESS compatibility guidance before ordering.

Included in Kit

• 1x Fox ESS EQ5000 4.92kWh Master Battery
• Integrated system controller / Battery Management System

Not included: An EQ5000-S Slave battery is required to create a working conventional system. Additional Slave batteries, inverter and installation accessories are sold separately.

Complete your conventional stack: Add the Fox ESS EQ5000 4.92kWh Slave Battery HERE.

Fox ESS EQ5000 Battery Sizing and Scalability

The minimum and maximum number of EQ5000 batteries varies by inverter. The current Fox ESS sizing guidance shows:

How conventional stacks are built: Each conventional EQ5000 stack contains 1x EQ5000-M Master plus the supported number of EQ5000-S Slave modules. A two-battery stack contains 1x Master and 1x Slave; a three-battery stack contains 1x Master and 2x Slaves.

H3 Pro: Fox ESS lists support for 2-12 EQ5000 batteries. Because each series stack is limited to six modules, systems above six batteries use the supported multi-stack arrangement and require one Master per stack. Confirm the final design against the exact inverter model and current Fox ESS guidance.

PowerQ / PQ1: The all-in-one inverter replaces the separate battery controller, so its stack is made from EQ5000-S Slave modules only. View the forthcoming PowerQ listing HERE.

Key Features of the Fox ESS EQ5000 Master Battery

• 4.92kWh nominal capacity per battery module
• Integrated system controller / BMS for a conventional EQ5000 stack
• High-voltage LiFePO₄ chemistry for a safe and durable storage solution
• 90% Depth of Discharge, providing approximately 4.43kWh usable capacity per module
• Scalable modular design with up to six modules connected in series
• More than 95% battery pack round-trip efficiency under stated test conditions
• 50A maximum continuous charge / discharge current
• 65A peak discharge current for 60 seconds
• IP65 rated for indoor or outdoor floor-standing installation
• Integrated battery heating for improved cold-weather operation
• Natural convection cooling with no cooling fan required
• CAN communication with compatible Fox ESS inverters
• 12-year manufacturer warranty, subject to registration and current Fox ESS terms

Capacity and Electrical Specifications

• Nominal Capacity: 4.92kWh per module
• Approximate Usable Capacity: 4.43kWh per module at 90% DoD
• Minimum Conventional System Capacity: 9.84kWh nominal / approximately 8.86kWh usable
• Nominal Voltage: 64V per module
• Recommended Discharge Current: 38.5A
• Maximum Continuous Charge / Discharge Current: 50A
• Peak Discharge Current: 65A for 60 seconds
• Battery Pack Round-Trip Efficiency: More than 95%
• Depth of Discharge: 90%
• Cycle Life: At least 6,000 cycles under the manufacturer’s stated test conditions
• Communication: CAN

Physical Specifications

• Master Module Dimensions (W x H x D): 570 x 185 x 380mm
• Master Module Weight: Approximately 45kg
• Minimum Two-Module System Dimensions (W x H x D): 570 x 375 x 380mm
• Minimum Two-Module System Weight: Approximately 97.2kg including the assembled system components
• Installation: Indoor or outdoor, floor-standing
• Ingress Protection: IP65
• Cooling: Natural convection

Operating Conditions

• Standard Charging Temperature: 0°C to 55°C
• Standard Discharging Temperature: -10°C to 55°C
• With Battery Warming Function: Operation down to -25°C, subject to system conditions
• Storage Temperature: -10°C to 50°C
• Humidity: 5-95%, non-condensing
• Maximum Altitude: 3,000m

Charging power may be derated between 0°C and 15°C. Installation location and operating conditions must comply with the current Fox ESS manual.

Safety and Certification

• Battery Chemistry: Lithium iron phosphate (LiFePO₄)
• Safety: IEC 62619
• EMC: IEC 61000-6-1/2/3/4
• Transport: UN38.3
• Ingress Protection: IP65

Installation and Monitoring

• The EQ5000-M contains the controller / BMS required to operate a conventional EQ5000 stack
• Each conventional stack requires exactly 1x Master and the supported number of EQ5000-S Slave modules
• The plug-and-play modular design helps simplify professional installation and future expansion
• System performance, battery status and energy data can be monitored through FoxCloud when connected to a compatible Fox ESS inverter
• Installation and commissioning must be completed by a suitably qualified installer in accordance with Fox ESS instructions

Expanding an existing system: Fox ESS requires existing and newly added batteries to have closely matched state of charge, with a maximum difference of ±5%. Current warranty guidance states that a formal capacity expansion should be requested within 12 months of the original installation. Confirm expansion suitability before ordering.

Fox ESS EQ5000 Warranty

The Fox ESS EQ5000 battery range includes a 12-year manufacturer warranty, subject to the current Fox ESS warranty terms, online registration, correct system design, professional installation and ongoing connectivity requirements.

Compatibility

The EQ5000-M Master is designed for conventional EQ5000 stacks used with selected Fox ESS high-voltage inverter ranges, including:

• Fox ESS H1 / AC1
• Fox ESS KH / KA Series
• Fox ESS H3 / AC3
• Fox ESS H3 Smart
• Fox ESS H3 Pro

PowerQ / PQ1: The separate EQ5000-M Master is not used with a Fox ESS PowerQube / PQ1 all-in-one system. That system accepts 2-6 EQ5000-S Slave modules directly.

Important: Compatibility and permitted battery quantities vary between inverter models. Do not mix EQ5000 modules with EQ4800 or other Fox ESS battery models in the same stack unless Fox ESS has explicitly approved that configuration. Please contact us before ordering if you are expanding an existing system or are unsure which products you require.

Frequently Asked Questions

Fox ESS Integrations

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Product Code: EQ5000-M
Learn More: Fox ESS EQ5000 Battery

Downloads

Datasheet – Fox ESS EQ5000
User Manual – Fox ESS EQ5000

Fox Energy Cube (EC, EQ) Upgrade Guide – How to add a Battery to an Existing System

Order the Fox ESS EQ5000 4.92kWh Master Battery today from The Eco Supermarket for fast UK delivery, expert technical support and full manufacturer warranty.