Fox EQ4300 4.32kWh SLAVE Battery – EQS4300 Fox ESS

Fox EQ4300 4.32kWh SLAVE Battery – Energy Cube Expansion Module

Scalable high-voltage battery expansion with the Fox EQ4300 4.32kWh SLAVE Battery. Designed as part of the Fox ESS Energy Cube system, this high-voltage lithium battery allows existing systems to be expanded easily using a compact, stackable modular design.

The EQ4300 SLAVE battery provides 4.32kWh nominal capacity and is intended to increase the total storage capacity of an Energy Cube system that already includes a compatible Fox ESS MASTER battery.

Important: This is a SLAVE battery and cannot operate on its own. A compatible Fox ESS MASTER battery is required. You can purchase a MASTER battery HERE.

Battery Configuration Limits (Important)

• Minimum requirement:
  • 1x Fox ESS MASTER battery
  • 1x EQ4300 SLAVE battery
• Maximum expansion:
  • Up to 6x SLAVE batteries per system
  • Total capacity up to 30.24kWh (1x MASTER + 6x SLAVE)

Maximum battery quantity may depend on inverter model and system configuration. Please contact us if you are unsure.

Key Features of the Fox EQ4300 4.32kWh SLAVE Battery

• 4.32kWh nominal capacity per battery module
• High-voltage lithium battery for residential energy storage
• Scalable modular architecture – expand capacity as demand grows
• Stackable, space-saving design
• Plug-and-play installation with simple buckle-fixing system
• 90% Depth of Discharge (DoD) for high usable energy
• CAN / RS485 communication for seamless system integration
• Fast charge and discharge performance
• Wide operating temperature range
• 12-year manufacturer warranty (subject to registration)

Physical Specifications

• Installation type: Stackable, floor-mounted
• Form factor: Compact Energy Cube module

Installation & Monitoring

• Designed for simple expansion of existing Energy Cube systems
• Installed directly into the Energy Cube battery stack
• System monitoring available via Fox ESS Cloud (with compatible inverter)

Warranty

The Fox EQ4300 4.32kWh SLAVE Battery includes a 12-year manufacturer warranty when registered via the Fox ESS warranty portal.

Fox ESS Integrations

Earn extra from your Fox ESS battery

Axle Energy runs a free Virtual Power Plant (VPP) that works with Fox ESS batteries and inverters. It occasionally exports energy from your system to support the grid - and pays you for taking part.

• £25 signup bonus when you join via our link
• £10/month minimum earnings guaranteed
• £1 per kWh exported during events

Earn £10/month & join the Axle VPP

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Frequently Asked Questions

Product Code: EQS4300
Learn More: Fox ESS Energy Cube Factsheet

Downloads

Datasheet – Fox EQ4300 4.32kWh Battery
Installation Guide – Fox ESS EQ Series
User Manual – Fox ESS EQ Series
Fox ESS Battery Warranty Policy (UK)

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

Video

Order the Fox EQ4300 4.32kWh SLAVE Battery today from The Eco Supermarket for fast UK delivery, expert technical support and full manufacturer warranty.