CQ6-L9

Perfect Quality

Great Warranty

Australian Owned

Exceptional Quality

The FOX ESS CQ6-L9 (53.91kWh) is a high-voltage modular battery storage system designed for large residential and commercial solar applications. Built with LiFePO₄ battery technology and a scalable architecture, the system delivers strong performance, high safety, and long-term reliability. With a total capacity of 53.91kWh and a nominal voltage of approximately 518V, the CQ6-L9 enables efficient energy storage and reduced system losses. Its modular design allows flexible expansion, making it suitable for a wide range of applications from high-consumption homes to commercial energy storage systems. The system also features high efficiency (>95%), full depth of discharge capability, and IP65-rated protection, ensuring reliable operation across diverse environmental conditions. Supported by FOX ESS’s advanced battery platform and scalable design, the CQ6-L9 provides a powerful and flexible solution for modern energy storage needs.

Key Information

Product Code

CQ6-L9

Brand

Fox ESS

Wattage

Product Warranty

Performance Warranty

Maximum Efficiency

95% (Round-trip Efficiency)

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Advanced LiFePO₄ Battery Technology:
The system utilises lithium iron phosphate (LiFePO₄) battery chemistry, providing enhanced safety, high thermal stability, and long service life compared with conventional lithium-ion battery systems.

High Energy Storage Capacity (53.91kWh):
The CQ6-L9 configuration delivers a total system capacity of 53.91kWh, making it suitable for large residential and commercial energy storage applications.

Modular & Scalable Design:
Built with a modular architecture (1 master + multiple expansion modules), the system can be expanded from 11.98kWh up to 83.86kWh per stack, offering flexible system sizing for different energy demands.

High Voltage System (~518V):
With a nominal voltage of approximately 518.4V, the system enables lower current, improved efficiency, and reduced energy losses compared with low-voltage battery systems.

High Efficiency & Full Usable Energy:
The battery delivers >95% round-trip efficiency and supports up to 100% depth of discharge (DoD), maximising usable energy and system performance.

Enhanced Temperature & Climate Performance:
Designed for reliable operation in a wide range of conditions, the system supports operating temperatures from 0°C to 55°C (charge) and -10°C to 55°C (discharge).

Strong Mechanical & Environmental Protection:
The system features IP65-rated protection, allowing both indoor and outdoor installation while maintaining resistance to dust and water ingress.

Plug-and-Play Installation:
The CQ6 system is designed for easy installation with plug-and-play connections, reducing installation time and complexity.

Scalable High Power Output:
The CQ6-L9 configuration supports rated DC power of approximately 25.92kW, suitable for high-demand energy storage applications.

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Fox ESS delivers advanced solar inverter and energy storage solutions for homeowners and businesses seeking intelligent energy management, reliable performance, and flexible system integration. Founded in 2019, Fox ESS is a rapidly growing global energy technology brand focused on developing high-efficiency solar inverters and battery storage systems that support the transition toward smarter, cleaner energy.

Built on strong research and development capabilities and supported by global manufacturing resources, Fox ESS specialises in a wide range of products including string inverters, hybrid inverters, battery storage systems, and smart energy management platforms. By combining efficient power conversion technology with intelligent monitoring and scalable storage solutions, Fox ESS provides high-quality energy systems designed to maximise solar generation, enhance energy independence, and deliver reliable performance for residential and commercial solar installations.

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CQ6-L9

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