Commercial and domestic battery storage
What does commercial battery storage cost?
No supplier publishes a price scale for commercial battery storage, and the best answer currently ranking is a German software vendor's blog. So this page does the two things that are actually decidable: what moves a commercial quote, and the payback arithmetic of charging off-peak and discharging against demand charges. Domestic pricing, where quotes ARE observable, is set out underneath as the small-scale reference point.
What sets a commercial battery storage cost, and domestic prices for reference
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Commercial battery storage is quoted per project, not per kWh off a list: the size follows your half-hourly load profile, and the value follows what you avoid rather than what you buy. The drivers below are what a quote is built from. The domestic rows underneath are included because those quotes ARE observable, and they anchor the small-commercial end.
We publish no price range for commercial battery storage because we have not measured one, and no supplier publishes a scale: commercial systems are priced against a specific load profile, connection position and cycling regime. The domestic ranges are typical installed quotes for lithium home batteries observed across the UK market in 2026, varying by brand, usable capacity and configuration. The VAT position is per HMRC VAT Notice 708/6: the zero rate has covered battery storage installations, including standalone and retrofit, since 1 February 2024. Get a quote against your own half-hourly data via the form above.
| Item | What it does to the price | Notes |
|---|---|---|
| Half-hourly load profile | Sets the usable capacity and power rating, and therefore most of the cost | A commercial battery is sized against your actual peaks, not floor area or headcount; ask for the profile to be modelled before any figure |
| Demand (capacity) charges avoided | The main value line on most commercial cases | Value comes from shaving billed peak capacity, so the same battery is worth more on a spiky profile than a flat one |
| Solar oversupply on site | Turns exported units into displaced import at a much better rate | Where an existing array exports heavily, storage changes what that generation is worth without adding panels |
| Grid connection position | Can dominate the budget where a G99 application or capacity upgrade is triggered | Settle whether the scheme needs a connection application before comparing hardware prices at all |
| Cycling regime and warranty | Sets replacement timing, and therefore lifetime cost rather than capital cost | Compare warranted throughput (cycles or MWh), not just years; a cheaper system cycled harder is not cheaper |
| Domestic: 5kWh battery, installed | £2,500–£4,500 (typical 2026 quotes) | The small-scale reference point; covers a typical home's evening without an EV |
| Domestic: 10kWh battery, installed | £4,500–£7,000 (typical 2026 quotes) | Higher users, EV owners and bigger arrays; per-kWh price falls as size rises |
| VAT on installation | 0% until 31 March 2027 | Zero-rated since 1 February 2024 including standalone and retrofit; scheduled to revert to 5% after March 2027 (VAT Notice 708/6) |
- A 5kWh home battery typically costs £2,500–£4,500 installed in 2026 quotes; a 10kWh system runs £4,500–£7,000 (varies by brand and installation complexity).
- Battery storage installations have carried 0% VAT since 1 February 2024, including retrofit and standalone batteries, with the zero rate scheduled until 31 March 2027 (HMRC VAT Notice 708/6).
- Typical home battery payback is 8–12 years and depends on the gap between your peak and off-peak rates, batteries earn by moving your usage, not by existing.
Cite this page
“What sets a commercial battery storage cost, and domestic prices for reference”, Battery Storage Cost, https://batterystoragecost.co.uk/ (updated 2026-08-14). We publish no price range for commercial battery storage because we have not measured one, and no supplier publishes a scale: commercial systems are priced against a specific load profile, connection position and cycling regime. The domestic ranges are typical installed quotes for lithium home batteries observed across the UK market in 2026, varying by brand, usable capacity and configuration. The VAT position is per HMRC VAT Notice 708/6: the zero rate has covered battery storage installations, including standalone and retrofit, since 1 February 2024. Get a quote against your own half-hourly data via the form above.
Go deeper
Sourced, dated, kept current.
- Battery storage without solar: is it worth it in the UK?
A battery without solar earns purely from tariff arbitrage: charge cheap off-peak, use at peak. When the maths works, when it doesn't, and the honest payback picture.
- 0% VAT on battery storage: the relief explained, 2024 to 2027
Battery storage installations carry 0% VAT since 1 February 2024, retrofit and standalone included, until 31 March 2027. How the relief works and who gets it.
- What size battery does a UK home need? 5kWh vs 10kWh
The average UK home uses about 2,700 kWh of electricity a year, roughly 7.4 kWh a day. Why 5kWh suits most homes, who actually needs 10kWh, and sizing mistakes.
How it works
- Tell us about your home: solar or not, how much electricity you use, when you'd install. Two minutes.
- We pass your details to trusted battery installers covering your postcode, and to no one else.
- They contact you directly with their actual price for your home. Compare, choose, or walk away.
Battery Storage Cost is a free introduction service operated by Ellul Solutions Ltd; we pass your details to trusted local battery storage installers who quote you directly. We may receive a fee from providers; you pay nothing and are under no obligation. We are not an installer and nothing here is financial advice; cost figures are typical 2026 quote ranges that vary by brand, region and installation complexity, and payback estimates depend on your tariff and usage.
Frequently asked
How much does home battery storage cost in the UK?
Typical 2026 installed quotes: £2,500–£4,500 for a 5kWh battery, £4,500–£7,000 for 10kWh. Prices include 0% VAT, which has applied to battery installations since February 2024. Brand, usable capacity and installation complexity move the figure, so get quotes for your actual home.
How long does a home battery take to pay for itself?
Typically 8–12 years, and we'd rather say that plainly than sell you a fantasy. The payback depends on the gap between your peak and off-peak rates and how many kWh you actually shift each day. Wide-gap tariffs (EV tariffs especially) and high evening use reach the front of the range; flat tariffs without solar may never pay back.
Is there still 0% VAT on battery storage?
Yes. Battery storage installations in homes have been zero-rated since 1 February 2024, including retrofit batteries added to existing solar and standalone batteries without solar. The zero rate is scheduled to run until 31 March 2027, then revert to 5% (HMRC VAT Notice 708/6).
Is it cheaper to install a battery with solar or add one later?
Together is usually cheaper: a hybrid inverter serves both, so the battery's share of a combined install is smaller than a standalone retrofit. But retrofitting an AC-coupled battery to existing solar is routine, typically a one-day job, and sits within the same typical 2026 ranges: £2,500–£4,500 for 5kWh installed.
Do I need solar panels to make a battery worthwhile?
No, but you need a time-of-use tariff. Without solar, a battery earns purely by charging cheap off-peak and discharging at peak, which works when the tariff gap is wide (EV owners do best) and does nothing on a flat tariff. With solar, the battery also banks your surplus generation, which strengthens the case.
Is this quote service really free?
Yes, free to you, with no obligation to accept any quote. We pass your details only to trusted local battery storage installers, who quote you directly; we may receive a fee from those providers, which is how the service is funded.