Buying guide · Battery storage
How Much Does Home Battery Storage Cost in the UK? (2026 Price Guide)
Price bands by capacity, the cost-per-kWh figure that actually matters, 0% VAT to 2027, and how the popular batteries compare.
What you're actually paying for
A home battery quote bundles three things: the battery itself, the electronics that charge and discharge it (a hybrid inverter, or an AC-coupling module on a retrofit), and installation. When you compare prices, make sure you're comparing like for like — a battery-only price and a fully-installed price can differ by a few thousand pounds.
Capacity is quoted in kilowatt-hours (kWh) of usable storage. That is the headline number, but two 10kWh batteries can still behave very differently depending on their continuous power output (kW), round-trip efficiency and warranty. Usable kWh is where you should start, then sanity-check the rest.
Typical UK price bands by capacity (2026)
As a planning guide, these are broad fully-installed ranges seen across the UK market in 2026. Retrofitting to an existing solar array (AC-coupled) tends to sit at the upper end because it adds its own electronics; fitting a battery at the same time as a hybrid inverter is usually more efficient per kWh.
- 1 Around 5kWh — roughly £2,500–£4,000 installed. Suits smaller homes or topping up daytime solar use.
- 2 Around 10kWh — roughly £4,500–£7,000. The popular whole-home size for a typical family.
- 3 13.5kWh (Powerwall-class) — roughly £7,000–£9,500 as an all-in-one AC battery.
- 4 15kWh and above — roughly £8,000–£12,000, often as stacked modular units.
Cost per kWh — the number that matters
Divide the installed price by usable capacity and you get cost per kWh — the fairest way to compare quotes. In 2026 most UK residential storage lands somewhere around £500–£800 per usable kWh installed, and the figure usually falls as capacity rises because the fixed installation cost is spread over more storage.
If a quote works out well above that band, ask what's driving it: a premium all-in-one unit, a difficult install, or simply margin. If it's well below, check the warranty, the usable-vs-nominal capacity, and whether installation is genuinely included.
How the popular options compare
The Tesla Powerwall is a large all-in-one AC battery — simple to retrofit and strong on software, but you buy in one big capacity step. GivEnergy is UK-built and modular, so you can size capacity more precisely and expand later. FoxESS is a competitively-priced stackable option that has become a common choice on new hybrid installs.
None of these is automatically 'best' — the right pick depends on whether you're retrofitting or installing fresh, how much evening load you have, and how much you value expandability versus a single tidy box.
0% VAT and what drives your payback
Battery storage in Great Britain currently carries 0% VAT, a relief that runs until 31 March 2027 and, since February 2024, applies to standalone batteries as well as those installed with solar. That alone takes a meaningful chunk off the prices above.
Payback then comes down to how much of the stored energy you actually use in the evening peak and what you pay per unit. Pairing a battery with a time-of-use tariff — charging cheaply overnight and avoiding peak-rate grid imports — is often what turns a long payback into a sensible one, especially if you already have solar generating during the day.
Use these bands to sanity-check quotes, not as a fixed price list — then browse our battery storage range to compare real capacities and specs.
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