11.52~46.08kWh | High Voltage Battery
The Fox ESS EP12 Plus (w) is a high-voltage, modular home battery built on safe LFP (lithium iron phosphate) chemistry. Each unit stores 11.52kWh, all of it usable thanks to a 100% depth of discharge, and up to four units can be connected in parallel for a maximum of 46.08kWh.
With IP65 protection and the choice of floor or wall mounting, the EP12 Plus (w) suits a wide range of Australian homes, indoors or out. It’s a strong option for households that want to make full use of every kilowatt-hour they store, with room to expand as their energy needs grow.
Key features of the Fox ESS EP12 Plus (w) High Voltage Battery
- Modular & Scalable Design
- Each unit delivers 11.52kWh of nominal energy
- Up to four units can be connected in parallel for a maximum of 46.08kWh
- 100% Depth of Discharge (DoD)
- The full 11.52kWh per unit is usable
- Get the most out of every battery you install
- 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
- 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 EP12 Plus (w) High Voltage Battery
- Battery type: LFP (LiFePO₄) high-voltage battery
- Nominal energy: 11.52kWh per unit
- Usable capacity: 11.52kWh per unit
- System capacity: 11.52kWh to 46.08kWh (up to 4 units in parallel)
- Nominal power: 11.52kW
- Nominal voltage: 384V
- Operating voltage: 348V–438V
- Max. charge/discharge current: 30A
- Peak discharge current: 65A (60 seconds)
- Round-trip efficiency: ≥95%
- Depth of discharge: 100%
- 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 640 x 185 mm
- Weight: 98kg
- Certifications: IEC 62619, EN IEC 61000-6-1/2/3/4, UN38.3
Fox ESS EP12 Plus (w) High Voltage Battery warranty
The Fox ESS EP12 Plus (w) 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 EP12 Plus (w) High Voltage Battery
- Strong continuous output: A nominal power of 11.52kW per unit lets the battery run several large appliances at once, such as air conditioning, an oven and a pool pump.
- Strong surge support: A peak discharge current of 65A for 60 seconds helps the battery handle start-up surges from motors and compressors.
- More storage, similar size: The EP12 Plus (w) offers more usable energy than the Fox ESS EP11 in a similar footprint, and it’s slightly lighter.
- 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 EP12 Plus (w) High Voltage Battery
- Heavy single unit: At 98kg, each battery needs at least two installers, and wall mounting requires a solid, load-bearing wall.
- Deeper than some alternatives: At 185mm deep, it sticks out further from the wall than slimmer batteries like the EP11 (147mm), which may matter in narrow side passages.
- Limited expansion: A maximum of four units (46.08kWh) may not suit very large homes or businesses with high energy needs.
- 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 EP12 Plus (w) 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 EP12 Plus (w) High Voltage Battery
The Fox ESS EP12 Plus (w) is well-suited to a range of Australian energy scenarios:
- Medium to large family homes: A single unit covers the evening energy use of most households, and a second or third unit suits homes with ducted air conditioning or a pool.
- Electrified homes: Ideal for households that have switched to induction cooking, heat pump hot water or EV charging and need more stored energy at night.
- Backup-focused households: A good fit for homes in areas with frequent outages that want to keep essential appliances running.
- Virtual Power Plants (VPP): Paired with a compatible Fox ESS inverter, the EP12 Plus (w) can be used to join a VPP and earn credits by supporting the grid during peak demand.
Is the Fox ESS EP12 Plus (w) High Voltage Battery right for you?
The EP12 Plus (w) 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 want to store as much excess energy as possible
- Want to use the full capacity of your battery without a depth-of-discharge limit
- Need enough power to run several large appliances at once
- Plan to expand your storage over time
- 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 EP12 Plus (w)’s 46.08kWh 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.
