How much does a home battery cost in the UK?

A typical 5–10 kWh installed home battery often costs between roughly £4,000 and £8,000 in 2026. Larger or stacked systems cost more.

Can I retrofit a battery to existing solar?

Yes. Most modern batteries can be added to an existing solar installation, usually via an AC-coupled battery or hybrid inverter.

Will I save money with a battery?

Savings depend on your tariff, usage patterns and whether you have solar. Batteries paired with time-of-use tariffs (charging when electricity is cheap) often deliver the best returns.

How long do home batteries last?

Most lithium-ion home batteries are warranted for 10 years and several thousand cycles. Real-world lifespan can exceed this with sensible use.

Battery Guide

Battery Storage Costs UK

A 2026 guide to what UK homeowners pay for home battery storage.

Battery payback calculator

Put in your monthly electricity bill and a battery size to see an illustrative saving and payback range. It's an estimate, not a quote.

Your monthly electricity bill

Battery size

Estimated annual saving

£297 – £535

Typical installed price

£5,500 – £8,000

Rough payback

10 – 27 yrs

Estimates assume you shift most of the battery's usable capacity each day at a 10–18p per kWh price gap, and are capped at a realistic share of your bill. Real savings depend on your tariff, solar generation and usage. The only accurate figure for your home is a written quote.

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Home batteries let you store electricity — from solar or cheap off-peak tariffs — and use it later when prices are higher or solar isn't producing. This guide covers what they cost installed.

Typical UK battery prices

5 kWh battery: ~£3,500 – £5,500 installed
10 kWh battery: ~£5,500 – £8,000 installed
13–15 kWh (e.g. Powerwall-class): ~£8,000 – £11,000 installed

Costs include the battery, hybrid or AC-coupled inverter where required, installation and commissioning. Get quotes for accurate pricing.

What affects the price

Capacity (kWh) and continuous power output (kW)
AC-coupled retrofit vs hybrid-inverter install
Brand — common UK names include GivEnergy, Tesla Powerwall, Solax, Sunsynk, Fox ESS
Backup / off-grid capability
Whether installed at the same time as solar

Is it worth it?

That depends on your tariff and usage pattern. See Is Battery Storage Worth It? for a full breakdown.

Considering Powerwall alternatives?

If Tesla's lead times or pricing don't suit you, see our guide to Tesla Powerwall Alternatives.

Battery installers near you

Why choose Home Energy Match

Free, no-obligation installer matching
UK-focused: we only work with installers covering UK postcodes
Multiple quotes so you can compare cost, warranty and approach
We do not sell your data to unrelated third parties
Transparent process — your enquiry is shared only with relevant installers

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Frequently asked questions

How much does a home battery cost in the UK?: A typical 5–10 kWh installed home battery often costs between roughly £4,000 and £8,000 in 2026. Larger or stacked systems cost more.
Can I retrofit a battery to existing solar?: Yes. Most modern batteries can be added to an existing solar installation, usually via an AC-coupled battery or hybrid inverter.
Will I save money with a battery?: Savings depend on your tariff, usage patterns and whether you have solar. Batteries paired with time-of-use tariffs (charging when electricity is cheap) often deliver the best returns.
How long do home batteries last?: Most lithium-ion home batteries are warranted for 10 years and several thousand cycles. Real-world lifespan can exceed this with sensible use.