Fox ESS CQ7 14.04–98.28kWh High Voltage LiFePO4 Battery Set – Master + Slave Modules

The Fox ESS CQ7 High Voltage Battery Set is a professional, modular and scalable energy storage solution designed for residential and commercial solar energy systems. Built with safe and reliable LiFePO4 battery technology, the CQ7 series offers high performance, long service life and flexible system expansion for modern hybrid energy installations.

This product page offers complete Fox ESS CQ7 battery sets starting from 14.04kWh up to 98.28kWh. Each set includes one CQ7-M-50 Master battery module and the required number of CQ7-S-50 Slave battery modules. The Master module includes the system controller required to manage the complete CQ7 battery tower, while the Slave modules are used to expand the total storage capacity.

The Fox ESS CQ7 system starts with 1 Master module + 1 Slave module for a total capacity of 14.04kWh. The system can be expanded step by step up to 1 Master module + 13 Slave modules, reaching a maximum storage capacity of 98.28kWh. This makes the CQ7 an excellent choice for customers who need a flexible battery system that can grow with their energy requirements.

Each battery module has a nominal capacity of 7.02kWh, a nominal voltage of 57.6V and a nominal capacity of 122Ah. The system uses a high-voltage architecture, allowing efficient energy storage and discharge when combined with compatible Fox ESS hybrid inverters. CAN communication ensures stable and reliable communication between the battery system and the inverter.

The CQ7 battery series is designed for easy installation and professional system integration. The modular, stackable design allows installers to build the required storage capacity in a clean and efficient way. With IP65 protection, natural convection cooling and support for indoor and outdoor stand installation, the Fox ESS CQ7 is suitable for a wide range of installation environments.

For increased safety, the Fox ESS CQ7 series includes multiple protection functions and an integrated fire protection function. The system is designed to protect against electrical and operational risks such as overvoltage, overcurrent, short circuit, reverse polarity, temperature issues and other system faults, supporting safe and reliable long-term operation.

The Fox ESS CQ7 High Voltage LiFePO4 Battery Set is a strong choice for customers looking for a scalable, future-ready and professional battery storage system. Whether used for self-consumption optimization, backup support or larger energy storage applications, the CQ7 offers flexibility, reliability and high-quality Fox ESS technology in one complete battery solution.

Important: A complete working CQ7 battery system always requires one CQ7-M-50 Master module and at least one CQ7-S-50 Slave module. The battery set must be installed and commissioned by a qualified installer according to Fox ESS installation requirements.

Available Set Configurations

• 14.04kWh: 1 × CQ7-M-50 Master + 1 × CQ7-S-50 Slave
• 21.06kWh: 1 × CQ7-M-50 Master + 2 × CQ7-S-50 Slave
• 28.08kWh: 1 × CQ7-M-50 Master + 3 × CQ7-S-50 Slave
• 35.10kWh: 1 × CQ7-M-50 Master + 4 × CQ7-S-50 Slave
• 42.12kWh: 1 × CQ7-M-50 Master + 5 × CQ7-S-50 Slave
• 49.14kWh: 1 × CQ7-M-50 Master + 6 × CQ7-S-50 Slave
• 56.16kWh: 1 × CQ7-M-50 Master + 7 × CQ7-S-50 Slave
• 63.18kWh: 1 × CQ7-M-50 Master + 8 × CQ7-S-50 Slave
• 70.20kWh: 1 × CQ7-M-50 Master + 9 × CQ7-S-50 Slave
• 77.22kWh: 1 × CQ7-M-50 Master + 10 × CQ7-S-50 Slave
• 84.24kWh: 1 × CQ7-M-50 Master + 11 × CQ7-S-50 Slave
• 91.26kWh: 1 × CQ7-M-50 Master + 12 × CQ7-S-50 Slave
• 98.28kWh: 1 × CQ7-M-50 Master + 13 × CQ7-S-50 Slave

Key Features

• Complete Fox ESS CQ7 high-voltage battery set
• Capacity options from 14.04kWh up to 98.28kWh
• Includes 1 CQ7-M-50 Master module and selected CQ7-S-50 Slave modules
• 7.02kWh nominal capacity per battery module
• High-voltage LiFePO4 battery technology
• 57.6V nominal voltage per module
• 122Ah nominal capacity per module
• Modular and scalable battery tower design
• CAN communication for compatible Fox ESS hybrid systems
• IP65 protection rating
• Natural convection cooling
• Suitable for indoor and outdoor stand installation
• Integrated fire protection function
• Designed for professional residential and commercial energy storage systems
• Expandable up to 14 modules in series: 1 Master + 13 Slave modules