Battery storage
Fox ESS batteries, installed by Geko
Fox ESS hybrid inverters and EP12 batteries, designed around your home and fitted by our own MCS-certified engineers across England and Wales.
The system
A hybrid inverter and a battery that grows with you.
A Fox ESS system pairs a hybrid inverter with Fox battery modules. The inverter runs your solar panels, charges and discharges the battery, and talks to the grid.
The Fox EP12 battery is rated at 11.52 kWh, with a little over 10 kWh usable each day. It's the battery we fitted for Pete and Sarah in Somerset, alongside a Fox ESS 6 kW inverter.
We also fit Tesla Powerwall 3, Sigenergy and EcoFlow PowerOcean, and recommend the one that suits your home.
Specifications
Fox ESS at a glance.
Fox ESS H1 single-phase hybrid inverters, sized to your roof and supply.
11.52 kWh rated, 90% depth of discharge: a little over 10 kWh usable.
More Fox batteries can be added as your needs grow.
Keeps essential circuits running in a power cut.
Or a set energy throughput, whichever comes first, with at least 70% capacity retained.
Generation, battery, usage and timed charging on your phone.
Why we fit it
Why Fox ESS is in our line-up.
Room to grow
Start with one battery and add more for an EV, a heat pump or more evening use.
Built for time-of-use tariffs
Set timed charge and discharge in the FoxCloud app to charge cheap and cover the peak.
Backup for essentials
The EPS output keeps the circuits you choose running in a power cut.
Fitted in Somerset
Pete and Sarah in Somerset run a Fox ESS 6 kW inverter and EP12 battery with 16 panels.
Fitted by our own engineers
MCS-certified for solar and batteries, a 6-year IAA insurance-backed guarantee and the paperwork handled. No doorstep sales.
Is Fox ESS right for your home?
Book a free video consultation. An engineer looks at your roof, usage and tariff, and recommends Fox ESS, Tesla Powerwall 3, Sigenergy or EcoFlow PowerOcean.
FAQ
Questions about Fox ESS.
What is Fox ESS?
Fox ESS makes hybrid inverters and home batteries. A Fox system pairs a hybrid inverter, which runs the solar panels and the battery, with Fox battery modules such as the EP12.
How much can a Fox ESS battery store?
The Fox EP12 is rated at 11.52 kWh with a 90% depth of discharge, so a little over 10 kWh is usable day to day. We size the system to your usage and can add more battery later.
Does Fox ESS work in a power cut?
Fox hybrid inverters have a backup (EPS) output that can keep essential circuits running in a power cut. We wire the circuits you choose to it and confirm what will run on your quote.
Does Fox ESS work with Octopus tariffs?
Yes. You can set timed charge and discharge in the FoxCloud app, so the battery can charge on cheap overnight rates and cover the evening peak. Our solar tariff guide covers Octopus Go, Flux and E.ON Next Drive.
What warranty does a Fox ESS battery have?
Fox's UK battery warranty runs for 10 years or a set energy throughput, whichever comes first, with at least 70% of capacity retained. Our work carries a 6-year IAA insurance-backed guarantee.
Have you fitted Fox ESS before?
Yes. Pete and Sarah in Somerset have a Fox ESS 6 kW inverter and an EP12 battery with 16 panels, fitted by Geko in a single day.
How much does a Fox ESS system cost?
It depends on the battery size, whether you're adding solar at the same time and your home. You get one total price in writing after a free video consultation.
Is there VAT on a Fox ESS battery?
Batteries installed in homes are zero-rated for VAT until 31 March 2027, then 5% from 1 April 2027.
Case study: Pete and Sarah's Fox ESS install →
Comparing battery quotes? How to choose a home battery in the UK →
Product specifications change, so we confirm the exact model and warranty terms on your quote.
Let's find the right system
for your home.
Book a free video consultation. We'll talk through your home and your options.
0% VAT on solar installs completed by 31 March 2027
