Fox ESS EP6 Plus 5.76kWh High Voltage LFP Battery with Heating Element

Fox ESS EP6 Plus 5.76kWh High Voltage LFP Battery with Heating Function is a compact, scalable solar battery module for Fox ESS hybrid and AC inverters. It provides dependable storage for self-consumption, time-of-use shifting and back-up applications, with a built-in heating element for stable performance even in cold UK installations such as garages and utility spaces.

Fox ESS EP6 Plus Key Features

• 5.76kWh high-voltage storage – 5.76kWh nominal capacity with around 5.18kWh usable energy at 90% depth of discharge, ideal for pairing with 3–6kW solar PV systems.
• 192V nominal battery voltage – high-voltage design (typical operating range around 174–219V) for reduced conversion losses and excellent system efficiency.
• Integrated self-heating function – built-in heater maintains the battery within a safe temperature range, allowing reliable charging and discharging in low ambient temperatures.
• LiFePO₄ (LFP) cell chemistry – long cycle life, strong thermal stability and improved safety compared with some other lithium chemistries.
• High round-trip efficiency – typically greater than 95%, maximising usable energy from solar generation and off-peak grid charging.
• Scalable up to 23.04kWh – connect up to 4 x EP6 Plus modules in parallel via a Fox EP junction box to reach 23.04kWh per inverter battery port.
• Compact, installer-friendly design – relatively low weight for a HV module and a slim enclosure to simplify wall or floor mounting in plant rooms and utility areas.
• Integrated BMS – built-in battery management system provides over/under-voltage, over-current, short-circuit and temperature protection.
• 10-year warranty – long manufacturer warranty (subject to registration and terms) for peace of mind over the system lifetime.

Why Choose the Fox ESS EP6 Plus?

• Perfect step-up from smaller batteries – a single EP6 Plus offers a meaningful usable capacity around 5kWh, with the flexibility to expand up to 23.04kWh as energy demands grow.
• Optimised for UK climates – the heating function makes it particularly suitable for unheated garages, lofts and outbuildings where winter temperatures regularly drop close to or below freezing.
• Seamless Fox ESS ecosystem integration – designed to work with the full range of Fox ESS 1‑phase and 3‑phase hybrid and AC inverters for plug-and-play communication and monitoring.
• High-voltage efficiency – fewer conversion stages and lower currents than low-voltage systems, helping to improve overall system efficiency and reduce cable losses.
• Strong long-term value – LFP chemistry, high round-trip efficiency and a 10-year warranty combine to offer an attractive lifetime cost per kWh stored.

Technical Highlights

• Battery type: LiFePO₄ (LFP) high-voltage module.
• Nominal energy: 5.76kWh; usable capacity approx. 5.18kWh at 90% depth of discharge.
• Nominal voltage: 192V; typical operating voltage range approx. 174–219V.
• Max charge current: 30A.
• Max discharge current: 30A.
• Depth of discharge: 90% DoD.
• Round-trip efficiency: >95% under typical conditions.
• Scalability: up to 4 units in parallel per inverter battery port, providing up to 23.04kWh total storage.
• Approximate weight: around 50–56kg per EP6 Plus module (check latest datasheet for exact value).
• Ingress protection: IP65-type enclosure for flexible installation (indoor or suitable sheltered outdoor locations).
• Compatibility: Fox ESS EP series is compatible with the full range of Fox ESS 1‑phase and 3‑phase Hybrid and AC inverters.

Important Installation Information

• The EP6 Plus must be installed, configured and commissioned by a competent installer in line with Fox ESS design guidelines and local electrical regulations.
• Use appropriate Fox ESS junction boxes and communication cables when connecting multiple EP6 Plus modules in parallel.
• Consider ambient temperatures, ventilation and access for servicing when selecting the installation location, particularly when relying on the self-heating function in colder climates.