Fox ESS vs EP Cube

Comparing Fox ESS and EP Cube home batteries for UK homes. Every price below is fully installed by an MCS-certified installer.

Installed from

£3,659

£3,770

Best £ per kWh

£373

£291

Sizes

5.76, 11.52 kWh

5, 10, 15, 20 kWh

Warranty

10 years

15 years battery / 10 years inverter

Cycle life

6,000+

IP rating

IP65

IP67 (battery) / IP65 (system)

Solar panels

Hybrid – direct solar input (2 MPPT)

Hybrid – direct solar input (2 MPPT, up to 10 kWp)

Chemistry

LFP

App

FoxCloud 2.0

EP Cube app

Lowest entry price

Fox ESS

Best value per kWh

EP Cube

Largest single system

EP Cube

Why Fox ESS

UK #1 by shipments. Ranked the UK's top residential battery brand by S&P Global shipment data.
Modular & stackable. Start with one EP6 or EP12 and add more batteries later, up to 4 units.
Heated batteries. Smart battery warming keeps cells charging efficiently through UK winters.
Indoor or outdoor. IP65 rated, floor or wall mounted, with built-in fire suppression.

All-in-one. Inverter and battery in one unit, so installs are quicker and tidier.
Grows in 5 kWh steps. Start at 5 kWh and add blocks up to 20 kWh in a single tower.
Whole-home backup. Built-in automatic switchover keeps the house running in a power cut, up to 7.6 kW.
IP67 battery. Water and dust-tight battery modules, suitable for outdoor installation.