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.

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.

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.