Fox ESS EP12 Plus 11.52kWh 384V Battery with Heating Element

Fox ESS EP12 Plus 11.52kWh 384V Battery with Heating Element is a high-voltage LiFePO₄ solar battery module for Fox ESS hybrid and AC inverters, ideal for UK homes and small businesses looking to maximise self-consumption and protect against rising electricity prices. It combines a large 11.52kWh storage capacity with an integrated heating function for reliable operation even in cold installations such as garages or outbuildings.

Fox ESS EP12 Key Features

• 11.52kWh high-voltage storage – 11.52kWh nominal capacity with around 10.3kWh usable energy at 90% depth of discharge, sized for typical 5–10kW solar PV systems.
• 384V nominal battery voltage – high-voltage architecture (approx. 348–438V operating range) matched to Fox ESS HV hybrid and AC-coupled inverters for high efficiency.
• Integrated heating element – built-in self-heating function that pre-warms the cells, allowing safe charging and better performance in low ambient temperatures.
• LiFePO₄ (LFP) cell technology – long cycle life, excellent thermal stability and improved safety compared to some other lithium chemistries.
• High round-trip efficiency – typically greater than 95%, maximising the usable energy from solar PV and off-peak grid charging.
• Scalable capacity – up to 4 x EP12 modules can be installed in parallel via a Fox junction box, delivering up to 46.08kWh of total storage.
• IP65-rated enclosure – robust housing suitable for indoor or sheltered outdoor installation, with strong protection against dust and water ingress.
• Integrated BMS and safety features – built-in battery management system with protection against over/under-voltage, over-current, short circuit and over-temperature, plus internal fire-safety features.
• 10-year warranty – when registered with Fox ESS, aligned with typical Fox inverter warranties.

Why Choose the Fox ESS EP12?

• Ideal for UK climates – the heating element makes the EP12 well suited to unheated garages, lofts and utility spaces where winter temperatures can fall below 0°C.
• Great match for Fox ESS systems – designed to work seamlessly with Fox ESS hybrid and AC inverters for fast installation, plug-and-play communication and unified monitoring.
• Expandable storage – start with a single 11.52kWh module and add up to three more EP12 units later as energy needs grow.
• Efficient high-voltage design – fewer conversion losses between PV, inverter and battery compared with some low-voltage systems, improving overall system yield.
• Strong total cost of ownership – long life, high efficiency and a 10-year warranty help deliver attractive lifetime cost per kWh stored.

Technical Highlights

• Battery chemistry: LiFePO₄ (LFP) high-voltage module.
• Nominal energy: 11.52kWh; usable energy approximately 10.3kWh at 90% depth of discharge.
• Nominal voltage: 384V; typical operating voltage range approx. 348–438V.
• Charge/discharge current: up to around 30A continuous (consult datasheet for peak ratings and limits).
• Round-trip efficiency: ≥95% under typical operating conditions.
• Ingress protection: IP65-rated enclosure for flexible installation locations.
• Installation configuration: floor or wall-mountable; up to 4 modules in parallel via Fox ESS junction box for up to 46.08kWh total storage.
• Compatibility: Fox ESS high-voltage hybrid and AC-coupled inverters (e.g. H1, KH, H3 and related HV ranges).

Important Installation Information

• The EP12 must be installed in accordance with Fox ESS design guidelines, local electrical regulations and relevant UK standards.
• Only trained, competent installers should design and install Fox ESS battery systems, ensuring correct DC cable sizing, protection devices and earthing.
• The heating element and operating temperature limits should be considered when selecting the installation location and enclosure.