Home battery prices · fitted · 0% VAT
Checked by our MCS-certified installers · Updated October 2026
Short answer
A home battery costs from £1,990 fitted for a Fox ESS EP6 added to the hybrid inverter you already have, or from £3,290 with a new inverter.
Your exact price is fixed after a free survey — it depends on where the battery goes, the cable run and your consumer unit.
Build yours.
1 · Pick a battery
2 · What do you have now?
Your battery, fitted
Fox ESS EP12
Battery only, added to your hybrid inverter Extra battery (Expansion), added to your Powerwall 3 Battery and a new hybrid inverter
from £2,790
up to £3,390 · Your inverter stays.
Storage11.52 kWh
The bar shows storage against the biggest single unit we fit (13.5 kWh).
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MCS-certified installer · Cert. no. NAP/79987/26/1
All four batteries we fit, with both fitted prices: battery only, or with a new inverter.
Smallest · lowest price
5.76 kWh
Battery only · you keep your inverter
from £1,990
Fitted price £1,990 – £2,390
Your inverter stays.
With a new inverter
from £3,290
Fitted price £3,290 – £3,890
Cheapest to largest inverter (3–10 kW). Most homes need the smallest.
Most installedOur pick
11.52 kWh
Battery only · you keep your inverter
from £2,790
Fitted price £2,790 – £3,390
Your inverter stays.
With a new inverter
from £4,290
Fitted price £4,290 – £4,890
Cheapest to largest inverter (3–10 kW). Most homes need the smallest.
Whole-home · EV ready
8.76 kWh
Battery only · you keep your inverter
from £3,190
Fitted price £3,190 – £3,590
Your inverter stays.
With a new inverter
from £4,690
Fitted price £4,690 – £5,790
Cheapest to largest inverter (3.6–12 kW). Most homes need the smallest.
Biggest single unit
13.5 kWh per unit
Battery only · you keep your inverter
from £4,990
Fitted price £4,990 – £5,390
Expansion unit on a Powerwall you already have.
With a new inverter
from £6,390
Fitted price £6,390 – £7,190
One Powerwall with its inverter. Two Powerwalls: £11,090.
Fitted prices at 0% VAT for a standard install. Prices checked 7 October 2026.
Every price above is the complete fitted price. Here's what it covers.
Battery only. You already have a Fox ESS, Sigenergy or Tesla hybrid system, and we add the battery to it.
A hybrid inverter runs your battery, and your panels if you have them. It works with the panels you already have (we replace the old inverter), or with no panels at all, charging overnight on a cheap tariff.
Each price is a range. Where your home lands in it comes down to a few things we check at your free survey.
The spot we fit it in changes how much work the job takes.
That's how far the cable travels to reach your system. A longer run means more work.
That's your fuse box. Its state can change what the job needs.
Only if you're having a new inverter. Fox ESS runs from 3 to 10 kW, Sigenergy from 3.6 to 12 kW. Most homes need the smallest.
Priced at survey, never on the day. A backup gateway (it keeps power on in a power cut), a new consumer unit or an unusually long cable run. If your home needs one, you'll see it in your written quote.
The price we quote is the price you pay. Your exact figure is fixed in writing after the survey, before anything is ordered.
Most homes we visit end up on the EP12. It stores twice as much, for £800 more as battery only (£1,000 more with a new inverter). But not every home needs it.
| Ask yourself | Choose the EP6 | Choose the EP12 |
|---|---|---|
| Evening use, roughly? | Under 6 kWh | 6–12 kWh |
| Solar on the roof? | Up to 3 kW | 4 kW or more |
| EV or heat pump coming? | No | Yes — the EP12, or Sigenergy |
Read the full EP6 vs EP12 guide →
Still deciding whether a battery is for you? The battery storage page covers what one does, which brands we fit and how the installation works.
A battery moves your electricity in time. You fill it when power is cheap or free, then run the house on it when the grid price is high. With panels, it fills from your own daytime surplus. Without panels, it fills in a cheap overnight tariff window. Either way, the app does it for you.
Overnight on an off-peak tariff, or from your panels through the day. You set it once in the app.
Cooking, lights, TV, the dishwasher at 9pm — all from the battery instead of the grid at peak price.
LFP (lithium iron phosphate) cells are rated for thousands of cycles. That's one a day for the whole warranty and well beyond.
The person who designs your system is on site when it goes in. We fit only the four batteries above, because we know them well. If one isn't right for your home, we'll tell you.
Because every home is a little different. Where the battery goes, how long the cable run is and the state of your consumer unit all change the work. With a new inverter, its size matters too — from 3 kW up to 10 kW (12 kW for Sigenergy). Your free survey fixes the exact figure in writing before anything is ordered, and the price we quote is the price you pay.
No. A battery with a hybrid inverter works on its own: it fills overnight on a cheap tariff and runs the house through the day. If you add panels later, they plug straight into the same inverter.
Yes. We fit a hybrid inverter alongside your panels, replacing the old string inverter — that is the battery + inverter price. If your existing inverter is recent and you would rather keep it, ask about an AC-coupled Fox ESS at survey.
Garage, utility room or an outside wall — not a bedroom, loft space used for sleeping, or an escape route. The wiring rules for home batteries changed in 2026; our update on where a battery can go explains them.
Only with a backup gateway, which is an extra quoted at survey. Fox ESS covers chosen circuits; Sigenergy and Powerwall 3 can back up the whole house.
Up to 3.68 kW we notify your network operator after the install (G98). Above that we apply first (G99). We handle both, and there is no fee — it is in the price.
Yes. Fox ESS EP batteries stack, Sigenergy grows in modules, and a Powerwall 3 takes expansion units. Fit one now, add another when the EV arrives — the battery-only prices above are what that costs.
Yes. A home battery fitted on its own or with solar is zero-rated for VAT until 31 March 2027. Every price on this page already reflects that.
A new battery + inverter is one day. Adding a battery to an existing hybrid system is half a day. Your power is off for well under an hour.
Get started
Tell us what you have and what you use. We design from your bill and a photo of your fuse board, then confirm on site. No salesperson, no pressure.
0% VAT on solar & battery until March 2027