13.92~97.44kWh | High Voltage Battery
The Fox ESS CQ7 is a high-voltage, stackable battery system built on safe LFP (lithium iron phosphate) chemistry. It’s made up of 6.96kWh modules stacked in series, with a minimum of two modules (13.92kWh) and a maximum of 14 (97.44kWh), making it one of the most scalable batteries in the Fox ESS range.
With a plug-and-play design, IP65 protection and a wide operating temperature range, the CQ7 is built for Australian homes and small businesses that want a large battery system that can grow over time.
Key features of the Fox ESS CQ7 High Voltage Battery
- Modular & Stackable Design
- Each battery module stores 6.96kWh
- Stack between 2 and 14 modules for a system capacity of 13.92kWh to 97.44kWh
- Plug & Play Installation
- Modules connect without complex wiring, saving installers valuable time
- High Voltage LFP Battery
- A wide operating voltage range of 104.4V to 919.8V pairs efficiently with high-voltage hybrid inverters
- LFP chemistry is known for its thermal stability and long cycle life
- 90% Depth of Discharge (DoD)
- Balances usable capacity with long-term battery health
- Durable Outdoor Design
- An IP65 rating protects against dust and water
- Operates from -10°C to 55°C when discharging and 0°C to 55°C when charging
- Built-in Fire Protection
- Integrated fire protection function adds an extra layer of safety
- Optional Warm-Up Function
- Extends the operating range down to -25°C for both charging and discharging, ideal for colder regions
Specifications of the Fox ESS CQ7 High Voltage Battery
- Battery type: LFP (LiFePO₄) high-voltage battery
- Module capacity: 6.96kWh
- System capacity: 13.92kWh (2 modules) to 97.44kWh (14 modules)
- Nominal voltage: 115.2V (2 modules) to 806.4V (14 modules)
- Operating voltage: 104.4V–919.8V
- Recommended charge/discharge current: 50A
- Max. charge/discharge current: 80A
- Peak discharge current: 120A (60 seconds)
- Round-trip efficiency: >95%
- Depth of discharge: 90%
- Communication: CAN
- Protection rating: IP65
- Operating temperature:
- Charge: 0°C to 55°C
- Discharge: -10°C to 55°C
- With optional warm-up function: -25°C to 55°C
- Cooling: Natural convection
- Installation type: Floor-standing, indoor or outdoor
- Dimensions (W x D x H): 660 x 360 x 420 mm (2 modules) to 660 x 360 x 2280 mm (14 modules)
- Weight: 105.5kg (2 modules) to 711.5kg (14 modules)
- Certifications: IEC 62619, IEC 61000-6-1/2/3/4, UN38.3
Fox ESS CQ7 High Voltage Battery warranty
The Fox ESS CQ7 typically comes with a 10-year manufacturer’s warranty, which is standard for lithium battery systems in Australia. As with any battery, buyers should make sure warranty terms, such as throughput limits and service coverage, are clearly outlined by their installer, as support quality may vary across regions.
Pros of the Fox ESS CQ7 High Voltage Battery
- High power output: A maximum current of 80A, with peaks of 120A for 60 seconds, delivers strong power. Because power rises with stack voltage, larger configurations can run more appliances at once.
- Small footprint: Every configuration sits on the same 660 x 360 mm base, so adding capacity grows the stack upward without using more floor space.
- High efficiency: With a round-trip efficiency of over 95%, very little energy is lost when charging and discharging.
- Silent operation: Natural convection cooling means there are no fans, so the battery runs quietly and has fewer moving parts to wear out.
- Easy status checks: Built-in LED indicators on each module let you and your installer check battery status at a glance.
- Internationally certified: IEC 62619 safety certification and UN38.3 transport certification give added confidence in the battery’s safety and build quality.
Cons of the Fox ESS CQ7 High Voltage Battery
- Floor-standing only: The CQ7 can’t be wall mounted, so it needs a suitable floor area, such as a garage or outdoor slab.
- Very heavy at full size: Even the smallest setup weighs 105.5kg, and a 14-module stack reaches 711.5kg and 2.28 metres tall. Large systems need a solid floor and enough height clearance.
- 90% depth of discharge: Some competitors, including Fox ESS’s own CQ6 series, offer up to 100% usable capacity.
- Large minimum size: The smallest system is 13.92kWh, which may be more storage than smaller households need.
- Cold-weather charging: Charging stops below 0°C unless the optional warm-up function is fitted, which may matter in alpine and colder inland areas.
- Inverter compatibility: The CQ7 needs a compatible high-voltage hybrid inverter, so check compatibility with your installer, especially if you’re retrofitting to an existing system.
Applications for the Fox ESS CQ7 High Voltage Battery
The Fox ESS CQ7 is well-suited to a range of Australian energy scenarios:
- Large family homes: Ideal for households with high evening energy use, such as those with ducted air conditioning, pools or multiple occupants.
- Fully electric homes: A strong fit for homes with EV charging, heat pump hot water and induction cooking that need plenty of stored energy overnight.
- Small businesses: Suits shops, offices and workshops that want to store solar energy and reduce peak-time electricity costs.
- Virtual Power Plants (VPP): Paired with a compatible Fox ESS inverter, the CQ7 can be used to join a VPP and earn credits by supporting the grid during peak demand.
Is the Fox ESS CQ7 High Voltage Battery right for you?
The CQ7 is not a one-size-fits-all solution, but it fits certain types of users particularly well.
It’s ideal if you:
- Have a medium to large solar system and high evening energy use
- Want a battery that can grow in small steps as your needs change
- Have floor space in a garage or outdoor area but limited wall space
- Want strong backup power for several large appliances
- Are planning a new system with a compatible Fox ESS high-voltage hybrid inverter
Consideration for smaller users:
If your household uses less energy, the CQ7’s 13.92kWh minimum may be more than you need. In that case, a single-unit battery like the Fox ESS EP11 may be a more cost-effective fit.
