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FOX ESS CQ7-M (W) – 6.96kWh Battery Module Master with Heating Element

The FOX ESS CQ7-M (W) is the master battery module for the FOX ESS CQ7 high-voltage residential energy storage system, combining advanced battery management, intelligent system control, and 6.96kWh of Lithium Iron Phosphate (LFP) energy storage in a single unit. As the central component of every CQ7 battery installation, the CQ7-M (W) is required once per battery stack and serves as the communication and control hub for all connected expansion modules.

Designed specifically for cold-climate applications, the Winter Version features an integrated battery heating element that enables reliable charging and discharging operation in temperatures ranging from -25°C to +55°C. This advanced thermal management system helps maintain battery performance during cold mornings and winter conditions, ensuring uninterrupted energy availability throughout the year.

The heating system is fully integrated with the FOX ESS monitoring platform and can be managed through the FOX ESS mobile application. Users can configure heating start and stop thresholds, as well as schedule up to three independent heating time windows, allowing the battery system to optimize performance and energy efficiency based on local climate conditions and energy usage patterns.

Built with high-performance Lithium Iron Phosphate (LFP) technology, the CQ7-M (W) delivers exceptional safety, thermal stability, long service life, and dependable energy storage performance. With 100% Depth of Discharge (DoD), users can access the full available battery capacity, maximizing solar energy utilization and system value.

The CQ7-M (W) includes the Battery Management Unit (BMU), system controller, communication interface, and the first battery module in the stack. Through CAN communication, it manages all connected CQ7-S (W) slave modules, supporting scalable storage configurations of up to fourteen total modules (one master plus thirteen slaves) and delivering a maximum system capacity of 97.44kWh.

The unit features a durable IP65-rated enclosure, making it suitable for both indoor and outdoor installations, and integrates seamlessly with compatible FOX ESS hybrid inverter systems for optimized solar energy storage and energy independence.

Key Features

• Master battery module for FOX ESS CQ7 high-voltage battery systems

• Integrated Battery Management Unit (BMU) and system controller

• 6.96kWh Lithium Iron Phosphate (LFP) battery capacity

• Built-in heating element for cold-climate operation

• Operating temperature range from -25°C to +55°C

• User-configurable heating schedules via FOX ESS app

• Adjustable heating start and stop temperature thresholds

• Supports up to three programmable heating time windows

• 100% Depth of Discharge (DoD)

• High-voltage battery architecture

• CAN communication and intelligent system monitoring

• Expandable with up to 13 CQ7-S (W) slave modules

• Maximum system capacity of 97.44kWh

• IP65-rated enclosure for indoor and outdoor installation

• High safety, reliability, and long service life

Technical Specifications

Intelligent Energy Storage for Cold Climates

The FOX ESS CQ7-M (W) is engineered to provide reliable, year-round energy storage performance in regions where low temperatures can affect conventional battery systems. By combining advanced LFP battery technology, intelligent heating controls, and scalable high-voltage architecture, it delivers a robust solution for residential solar energy storage.

When paired with compatible FOX ESS hybrid inverters and CQ7-S (W) expansion modules, the CQ7-M (W) enables homeowners to maximize solar self-consumption, reduce grid dependence, and maintain dependable energy availability even in challenging winter conditions.