10.36~41.44kWh | High Voltage Battery
The Fox ESS EP11 is a high-voltage, modular home battery built on safe LFP (lithium iron phosphate) chemistry. Each unit stores 10.36kWh, and up to four can be connected in parallel, making it a flexible option for households that want to start with one battery and expand later.
With a slim design, IP65 protection and the option of floor or wall mounting, the EP11 is designed to fit into a wide range of Australian homes, indoors or out. It’s a practical choice for those wanting reliable, scalable storage without overcomplicating their setup.
Key features of the Fox ESS EP11 High Voltage Battery
- Modular & Scalable Design
- Each unit delivers 10.36kWh of nominal energy
- Up to four units can be connected in parallel as your energy needs grow
- High Voltage LFP Battery
- 384V nominal voltage for efficient pairing with high-voltage hybrid inverters
- LFP chemistry is known for its thermal stability and long cycle life
- 90% Depth of Discharge (DoD)
- Around 9.3kWh of usable energy per unit
- Balances usable capacity with long-term battery health
- Flexible Installation
- Floor or wall mounting to suit different spaces
- Suitable for both indoor and outdoor installation
- 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 EP11 High Voltage Battery
- Battery type: LFP (LiFePO₄) high-voltage battery
- Nominal energy: 10.36kWh per unit
- System capacity: 10.36kWh to 41.44kWh (up to 4 units in parallel)
- Nominal voltage: 384V
- Operating voltage: 348V–438V
- Max. charge/discharge current: 27A
- Peak discharge current: 65A (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 or wall mounted, indoor or outdoor
- Dimensions: 710 x 625 x 147 mm
- Weight: 99kg
- Certifications: IEC 62619, EN IEC 61000-6-1/2/3/4, UN38.3
Fox ESS EP11 High Voltage Battery warranty
The Fox ESS EP11 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 EP11 High Voltage Battery
- Slim, space-saving profile: At just 147mm deep, the EP11 sits close to the wall and takes up very little room in garages, side passages and utility areas.
- Strong surge support: A peak discharge current of 65A for 60 seconds helps the battery handle start-up surges from appliances like air conditioners and pool pumps.
- High efficiency: With a round-trip efficiency of 95% or more, 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.
- 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 EP11 High Voltage Battery
- Heavy single unit: At 99kg, each battery needs at least two installers, and wall mounting requires a solid, load-bearing wall.
- 90% depth of discharge: Some competitors, including Fox ESS’s own CQ6 series, offer up to 100% usable capacity.
- Limited expansion: A maximum of four units (around 41kWh) may not suit very large homes or businesses with high energy needs.
- Moderate continuous output: A maximum continuous current of 27A may limit how many large appliances the battery can run at once during a blackout.
- 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 EP11 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 EP11 High Voltage Battery
The Fox ESS EP11 is well-suited to a range of Australian energy scenarios:
- Everyday family homes: A single unit suits most households looking to store daytime solar for use in the evening, cutting reliance on the grid when electricity prices are highest.
- Homes with limited indoor space: Its outdoor rating and wall-mount option make it a good fit for townhouses and homes without room in the garage.
- Growing households: Ideal for families who expect their energy use to rise, such as those planning to add an EV, heat pump or more air conditioning down the track.
- Virtual Power Plants (VPP): Paired with a compatible Fox ESS inverter, the EP11 can be used to join a VPP and earn credits by supporting the grid during peak demand.
Is the Fox ESS EP11 High Voltage Battery right for you?
The EP11 is not a one-size-fits-all solution, but it fits certain types of users particularly well.
It’s ideal if you:
- Have a small to medium solar system and want to store excess energy for the evening
- Want to start with one battery and add more later
- Have limited space and need a battery that can go on a wall or outdoors
- Prefer a quiet battery with no fans
- Are planning a new system with a compatible Fox ESS high-voltage hybrid inverter
Consideration for larger users:
If you run a large home or business with very high evening energy use, the EP11’s 41kWh limit may hold you back. In that case, the Fox ESS CQ6 Series, which scales to 83.86kWh per stack, may be a better fit.
