Fox ESS CQ7-S 6.96kWh High Voltage Slave / Expansion Battery Module

The Fox ESS CQ7-S is the 6.96kWh expansion battery module designed for the Fox ESS CQ7 high-voltage energy storage system. It is used alongside the CQ7-M master module to increase the total storage capacity of a CQ7 battery installation. Each CQ7-S adds an additional 6.96kWh of battery capacity to the system. Up to 13 CQ7-S modules can be combined with one CQ7-M master module, providing a highly scalable storage platform with total system capacity reaching 97.44kWh. Expand Your CQ7 Battery System The CQ7-S has been designed specifically as the expansion module within the CQ7 platform. While the CQ7-M incorporates the controller for the entire battery system, the CQ7-S provides additional battery capacity without an additional system controller. Fox ESS specifies that each CQ7 system must contain exactly one CQ7-M master module, with up to 13 CQ7-S expansion modules. This modular architecture makes it possible to configure the battery system according to the required energy-storage capacity while providing substantial room for larger installations. 6.96kWh Additional Battery Capacity Each CQ7-S contributes 6.96kWh to the CQ7 battery system. The CQ7 range uses LFP (LiFePO₄) battery technology and provides 100% depth of discharge, allowing the system's rated usable capacity to be utilised. Scalable Up to 97.44kWh The CQ7 platform supports a maximum of 14 battery modules connected in series. A maximum-capacity system consists of: 1 × CQ7-M Master Module 13 × CQ7-S Expansion Modules 97.44kWh total usable capacity This provides considerable flexibility when configuring the battery system for different storage requirements. High-Efficiency LFP Battery Technology The CQ7-S uses lithium iron phosphate (LiFePO₄/LFP) battery chemistry. Fox ESS specifies battery pack round-trip efficiency of greater than 95% at 25°C and 0.3C charging/discharging. LFP technology combined with the CQ7's high-voltage architecture provides a modern modular storage platform for compatible Fox ESS energy-storage installations. 100% Depth of Discharge Fox ESS specifies a 100% depth of discharge for the CQ7 platform. This means the system's specified nominal capacity is also listed as usable capacity across the CQ7 configurations shown in the manufacturer's datasheet. Up to 80A Charge & Discharge Current The CQ7 system supports a maximum charge/discharge current of 80A. Actual available current can be affected by operating conditions including battery temperature, cell voltage and state of charge. Indoor & Outdoor Installation The CQ7 is designed for indoor or outdoor installation on its compatible stand and carries an IP65 ingress-protection rating. Standard operating temperature: Charge: 0°C to 55°C Discharge: -10°C to 55°C Storage temperature: -10°C to 50°C The system uses natural convection cooling and is rated for installation at altitudes up to 3,000 metres. Integrated Fire Protection The CQ7 specifications include a fire protection function as part of the system's protection design. Modular Plug-and-Play Design The CQ7 battery has been designed around a modular stacked architecture. Fox ESS describes the system as a plug-and-play solution intended to simplify installation and save installer time. Additional CQ7-S modules are installed in series with the CQ7-M, allowing the battery stack to be configured according to the required capacity. Key Features 6.96kWh expansion battery module Designed for the Fox ESS CQ7 high-voltage battery system LFP (LiFePO₄) battery chemistry 100% depth of discharge 95% battery pack round-trip efficiency Maximum 80A charge/discharge current CAN communication LED status indicator Modular stackable design Up to 13 CQ7-S modules per system Maximum 14 total modules including CQ7-M System capacity scalable up to 97.44kWh IP65 ingress protection Fire protection function Indoor or outdoor installation Natural convection cooling Maximum installation altitude of 3,000m Plug-and-play system architecture Technical Specifications Specification CQ7-S Model CQ7-S Module Type Expansion / Battery Module Battery Chemistry LFP (LiFePO₄) Capacity 6.96kWh Usable Capacity 6.96kWh Depth of Discharge 100% Maximum Charge / Discharge Current 80A Battery Pack Round-Trip Efficiency >95%* Communication CAN Display 1 × LED Maximum CQ7-S Modules 13 per system Maximum Total Modules 14 in series Maximum System Capacity 97.44kWh Installation Indoor / Outdoor (Stand) Cooling Natural convection Ingress Protection IP65 Fire Protection Function Yes Maximum Altitude 3,000m Safety IEC 62619 EMC IEC 61000-6-1/2/3/4 Transportation UN38.3 Country of Manufacture China Compatible CQ7 System The CQ7-S is an expansion module and is designed to operate as part of a CQ7 system containing a CQ7-M master module. The CQ7-M contains the controller for the entire battery system, while each CQ7-S provides additional battery capacity. Fox ESS specifies that a system must contain only one CQ7-M and may contain a maximum of 13 CQ7-S modules. What's Included 1 × Fox ESS CQ7-S 6.96kWh Expansion Battery Module CQ7-M master module, additional CQ7-S modules, inverter and other system components are not included unless specifically stated in the selected package. The CQ7-S is intended to be used as part of a compatible Fox ESS CQ7 battery system and is not a complete standalone battery system. *Round-trip efficiency specified by Fox ESS at 25°C and 0.3C charging/discharging.