Fox ESS EP12 Plus 11.52kWh High Voltage Battery

High-Capacity, Scalable Energy Storage with Integrated Self-Heating Technology

The Fox ESS EP12 Plus is a premium high-voltage lithium iron phosphate (LiFePO₄) battery designed for larger residential and commercial energy storage applications.

Delivering an impressive 11.52kWh of storage capacity per module, the EP12 Plus provides outstanding performance, long cycle life, and flexible scalability. Using the Fox ESS 4-Way Junction Box, up to four batteries can be connected in parallel, providing up to 46.08kWh of storage capacity per battery input.

Featuring integrated self-heating technology, the EP12 Plus maintains optimum charging and discharging performance during colder weather conditions, making it ideal for UK installations and external mounting applications.

Compatible with the complete range of Fox ESS single-phase and three-phase hybrid and AC-coupled inverters, the EP12 Plus provides a powerful, future-proof energy storage solution.

Available from Solar Renewable Hub with nationwide delivery and dedicated technical support.

Key Features

• 11.52kWh High Voltage Battery Module
• Premium LiFePO₄ (LFP) Battery Technology
• Integrated Self-Heating Function
• Expandable to 46.08kWh Per Battery Port
• Compatible with Fox ESS Hybrid & AC Inverters
• High Round-Trip Efficiency >95%
• 90% Depth of Discharge
• IP65 Rated Enclosure
• Wall or Floor Mounted Installation
• 10-Year Manufacturer Warranty

Flexible & Scalable Storage

The EP12 Plus has been engineered to grow alongside changing energy requirements.

Using the Fox ESS 4-Way Junction Box, up to four EP12 Plus batteries can be connected in parallel to significantly increase storage capacity.

Expansion Options

• 1 Battery = 11.52kWh
• 2 Batteries = 23.04kWh
• 3 Batteries = 34.56kWh
• 4 Batteries = 46.08kWh

Ideal for:

• Large residential energy storage systems
• Commercial battery storage
• Solar self-consumption
• Time-of-use tariff optimisation
• Backup power applications

Integrated Self-Heating Technology

The EP12 Plus incorporates a built-in heating system to maintain battery performance during colder weather conditions.

Benefits

• Improved winter charging performance
• Enhanced low-temperature operation
• Increased battery longevity
• Greater year-round efficiency
• Ideal for external installations

Advanced LiFePO₄ Battery Technology

The EP12 Plus utilises premium Lithium Iron Phosphate (LFP) chemistry, offering excellent safety, reliability, and long-term performance.

Benefits

• Exceptional cycle life
• Enhanced thermal stability
• Increased safety
• Reliable performance
• Low maintenance operation

Outstanding Efficiency

Designed to maximise usable energy storage and minimise system losses.

Performance Highlights

• 90% Depth of Discharge (DoD)

• 
  

  95% Round-Trip Efficiency

• High Voltage Architecture
• Reduced charging losses
• Improved overall system efficiency

Technical Specifications

Battery Specifications

• Battery Chemistry: LiFePO₄ (LFP)
• Nominal Energy Capacity: 11.52kWh
• Operating Voltage Range: 348V – 438V
• Maximum Charge Current: 30A
• Maximum Discharge Current: 30A
• Depth of Discharge (DoD): 90%
• Round-Trip Efficiency: >95%
• Scalability: Up to 4 Units in Parallel

General

• Weight: 98kg
• Dimensions: 710 × 640 × 185mm
• Protection Rating: IP65
• Operating Temperature Range: -25°C to +55°C
• Humidity Range: 5% – 95% (Non-Condensing)

Compatibility

Compatible with:

• Fox ESS H1 G2 Hybrid Inverters
• Fox ESS KH Hybrid Inverters
• Fox ESS Three-Phase Hybrid Inverters
• Fox ESS AC-Coupled Inverters

Please refer to Fox ESS battery sizing guidelines for inverter-specific battery quantity limitations.

Compatibility Note

The EP battery range offers limited cross-generation compatibility:

• EP5 & EP6 batteries are compatible with each other
• EP11 & EP12 batteries are compatible with each other
• EP5/EP6 batteries are not compatible with EP11/EP12 batteries

Warranty

• Manufacturer Warranty: 10 Years*

*Subject to Fox ESS warranty terms and conditions.

Perfect For

• Large Residential Solar & Battery Systems
• Commercial Energy Storage
• Smart Tariff Optimisation
• Backup Power Solutions
• High Energy Demand Properties
• New Build Developments
• Retrofit Battery Installations

Why Choose the Fox ESS EP12 Plus?

The Fox ESS EP12 Plus combines substantial storage capacity, scalable system expansion, integrated self-heating technology, and premium LiFePO₄ battery chemistry to create a powerful and future-proof energy storage solution for both residential and commercial applications.

Why Buy From Solar Renewable Hub?

✔ Nationwide Delivery
✔ Dedicated Technical Support
✔ Trade & Credit Accounts Available
✔ Renewable Energy Specialists
✔ Installer Design & Project Support

Order your Fox ESS EP12 Plus 11.52kWh High Voltage Battery today from Solar Renewable Hub.

Downloads

Fox ESS EP12 Data Sheet