Fox ESS EP12 Plus 11.52kWh Li-ion Battery with Heater

Fox EP12 11.52kWh Li-ion Battery with Heater

Enhanced Performance with the Fox EP12 11.52kWh High Voltage Battery – Fox’s first slimline, wall-mountable storage solution with built-in self-heating technology for reliable performance in low temperatures.

The EP12 offers 11.52kWh capacity, 90% Depth of Discharge, and a 10-year warranty. With the Fox Junction Box, you can scale to 46.08kWh (4 units), or up to 92.16kWh when paired with the Fox H3 PRO hybrid inverter.

Note: A Junction Box is required when installing 2-4 EP12 batteries.

Note: Fox EP11 and EP12 batteries can be mixed in the same system, as long as all batteries are updated to firmware V1.010 or newer. For best performance, we still recommend using the same model where possible.

System Configuration Limits

Maximum Capacity:

4x EP12 Batteries = 46.08kWh
8x EP12 Batteries = 92.16kWh (with Fox H3 PRO only)

Key Features of the Fox EP12 11.52kWh Battery:

• 11.52kWh capacity per battery
• Self-heating element for improved low-temperature performance
• 90% Depth of Discharge (DoD)
• Scalable to 46.08kWh (4 units) / 92.16kWh (with H3 PRO)
• Slimline design — only 185mm depth, wall or floor-mountable
• IP65 Rated for indoor/outdoor use
• CAN / RS485 communication
• Wide temperature tolerance
• High voltage, high efficiency system
• 10-Year Warranty
• 6000+ Life Cycles

Easy Installation & Monitoring

• Requires Fox Junction Box for multi-battery setups
• Monitor performance with Fox Cloud 2.0 via smartphone or tablet

Fox ESS EP12 Warranty

The EP12 comes with a full 10-year warranty and is rated for 6000+ life cycles.

Compatibility of the Fox ESS EP12 Battery

EP12 Plus naming: The Fox ESS EP12 is also branded EP12 Plus. Both names refer to this same 11.52kWh battery model, not separate versions.

• Works with all Fox ESS single-phase and three-phase hybrid inverters
• Compatible with Fox AC-coupled inverters
• Junction Box required when connecting more than one battery

Adding EV charging?

Planning home EV charging alongside your solar or battery system? View the Fox ESS 7kW L Series EV Charger with a 5m tethered Type 2 cable. For solar-linked charging, check compatibility with your inverter and installation before ordering.

Fox ESS Integrations

Earn extra from a compatible home battery

Axle Energy runs a free Virtual Power Plant (VPP) for compatible home battery systems. During selected grid events, participating batteries can export energy to help support the grid - and customers are paid for taking part.

• £25 signup bonus when you join via our link
• £10/month minimum earnings guaranteed
• £1 per kWh exported during eligible events

Earn £10/month & join the Axle VPP

Explore smart energy tariffs with Octopus Energy
Octopus Energy offers tariffs designed around technologies including solar, battery storage and EV charging. Switch using our referral link and you'll receive £50 credit once your switch is complete. Existing customer? You can still explore their smart tariffs and energy services. T&Cs apply. Only one switching offer per household.

Get £50 Credit

Frequently Asked Questions

Product Code: FOX-EP12

Downloads & Videos

Datasheet – Fox ESS EP12
Installation Guide – Fox ESS EP12
User Manual – Fox ESS EP12
Factsheet – Fox EP Series

Warranty Document

Video – The Eco Supermarket | Expert Support. Real Reviews. Reliable Service.

Order the Fox ESS EP12 11.52 kWh Battery today from The Eco Supermarket for fast UK delivery, expert support and a 10-year warranty.