5 kWh: £2,500–£4,000 · 10 kWh: £4,500–£6,500 · 13.5 kWh: £6,500–£8,500
All installed, 0% VAT included.
Solar battery prices in the UK span a bewildering range. A small 2kWh unit can cost under £1,000, while a whole-home 20kWh system with backup can push past £12,000. The right size for your home depends on your solar generation, your evening usage and whether you want power cut protection — but every buyer starts with the same question: what does this actually cost?
This guide breaks down solar battery storage prices by capacity, brand and installation type, with real installed prices from UK quotes including the 0% VAT relief that applies to all battery storage installations.
Solar battery prices by size
Battery prices scale roughly with capacity, but not linearly — a 10kWh battery typically costs less per kilowatt-hour than a 2kWh unit. These are typical installed ranges for AC-coupled retrofit installations across Great Britain. Unit-only prices assume you already have a compatible inverter.
| Capacity | Suitable for | Unit price (no install) | Installed price |
|---|---|---|---|
| 2–3 kWh | Small flat | £800–£1,500 | £1,500–£2,500 |
| 5 kWh | 1–2 person home | £1,800–£3,000 | £2,500–£4,000 |
| 10 kWh | 3–4 person home | £3,500–£5,500 | £4,500–£7,000 |
| 13.5 kWh | Large home, backup | £5,500–£7,000 | £7,000–£9,000 |
| 20 kWh | Large home + EV + heat pump | £7,000–£10,000 | £9,000–£13,000 |
Brand price comparison
Here is how the most common solar batteries on the UK market compare on unit price and installed cost. Prices are typical fitted ranges from real installer quotes across England, Scotland and Wales.
| Battery | Usable capacity | Unit price | Installed price |
|---|---|---|---|
| Tesla Powerwall 2 | 13.5 kWh | £6,000–£7,000 | £7,000–£8,500 |
| GivEnergy AIO | 13.5 kWh | £5,500–£6,500 | £6,500–£8,000 |
| GivEnergy Giv-Bat 9.5 | 9.5 kWh | £3,500–£4,500 | £4,500–£5,800 |
| Fogstar 10.2 | 10.2 kWh | £3,200–£4,200 | £4,200–£5,500 |
| Fogstar 5.1 | 5.1 kWh | £1,800–£2,500 | £2,500–£3,600 |
| Sonnen 10 | 10.0 kWh | £5,500–£7,000 | £6,500–£8,500 |
| Fox Ess LV2600 | 10.4 kWh | £3,000–£4,000 | £4,000–£5,500 |
| Sunsynk 10.6 | 10.6 kWh | £3,800–£4,800 | £5,000–£6,200 |
| Puredrive 9.5 | 9.5 kWh | £3,800–£4,800 | £4,800–£6,000 |
Installation costs
Installation is usually a separate line item in any battery quote. The complexity of the job drives the price more than the battery brand.
| Installation type | Typical cost | Notes |
|---|---|---|
| Battery only, simple | £400–£600 | Straightforward wall mount near existing consumer unit |
| Battery + solar | £600–£1,000 | Installed alongside solar panels; combined labour saves overall |
| Consumer unit upgrade | £200–£400 | Adding RCD/MCB capacity if existing unit is full |
| Complex install | £800–£1,500 | Long cable runs, external mounting, brick fire-stopping, or listed building |
Solar battery + solar panel package prices
Bundling a battery with new solar panels is the most cost-effective route for most homes. The battery adds roughly half its stand-alone install cost when done at the same time, because the electrician is already on site and the cabling runs can be shared.
| Package | Typical installed price | Suitable for |
|---|---|---|
| 4 kW solar + 5 kWh battery | £8,000–£10,000 | Small to mid-size home, moderate daytime occupancy |
| 4 kW solar + 10 kWh battery | £10,000–£13,000 | 3–4 person home, covers most evening usage |
| 6 kW solar + 13.5 kWh battery | £14,000–£18,000 | Large home, high daytime solar export, backup capability |
| 8 kW solar + 20 kWh battery | £18,000–£24,000 | Large home with EV, heat pump and whole-home backup |
What affects solar battery prices
Not every battery quote is the same — four factors separate a budget from a premium installation.
Battery chemistry: LFP vs NMC
Lithium iron phosphate (LFP) is now the standard for home storage. It is safer, lasts longer (6,000–10,000 cycles) and costs slightly less than older nickel manganese cobalt (NMC) chemistries. NMC batteries are still found in some older Tesla Powerwall 2 units and a few compact batteries, but LFP has largely taken over.
Built-in inverter
Batteries with an integrated inverter — like the Tesla Powerwall 2, GivEnergy AIO and Sonnen 10 — cost more upfront but save you £800–£1,500 on a separate battery inverter. If you already have a hybrid solar inverter, a battery-only unit without an inverter is cheaper.
Brand premium
Sonnen, Tesla and Duracell carry a brand premium of roughly 20–30% over comparable capacities from Fox ESS, Fogstar or Sunsynk. You are paying for the badge, longer warranties in some cases, and sometimes better app ecosystems — but the underlying LFP cells are broadly similar.
UK support and installer network
GivEnergy and Sunsynk have strong UK-based technical support and large installer networks. That means faster warranty claims, more installers familiar with the kit, and often slightly lower quoted prices because installers can commission the system in half the time.
Prices by battery type
The type of battery system you choose affects both the price and how it integrates with your existing solar setup. Here are the three main configurations.
| Battery type | Typical cost (installed) | Pros | Cons |
|---|---|---|---|
| AC-coupled | £4,000–£8,000 | Works with existing solar inverter; easiest retrofit; any battery brand | Lower round-trip efficiency (~90%); two boxes on the wall |
| DC-coupled | £8,000–£14,000 | Higher efficiency (~97%); single system; better time-of-use arbitrage | Requires compatible hybrid inverter or full system replacement |
| Hybrid inverter + battery | £5,000–£10,000 | Best for new solar + battery installs; single inverter for both; clean install | Hybrid inverter needed if not already fitted; less flexibility to swap brands |
Frequently asked questions
Installed prices range from roughly £1,500 for a small 2–3 kWh battery to £13,000 for a large 20 kWh system with backup capability. A typical 10 kWh battery for a three-bed home costs £4,500–£7,000 fully installed, including 0% VAT. Unit-only prices are typically £800–£2,000 less if you already have a compatible inverter.
For most homes with solar panels, yes. A battery lets you use more of the free electricity you generate, cutting grid imports by 40–70%. Payback periods are typically 6–12 years depending on usage patterns, battery size and your electricity tariff. The payback is faster if you are on a time-of-use tariff like Octopus Flux or Intelligent Go.
Modern LFP batteries are rated for 6,000–10,000 cycles. At one full cycle per day, that is 16–27 years of service. Most manufacturers offer 10-year warranties that guarantee at least 60–70% of original capacity at the end of the term. The battery will not stop working after the warranty — it just holds less charge. Most solar batteries will comfortably last 15–20 years in practice.
Battery prices are on a gradual downward trend, driven by falling lithium costs and increased manufacturing capacity from Chinese cell producers. We expect a 5–10% year-on-year decline for the next few years. However, the pound exchange rate and UK installer labour costs mean the savings may not be as dramatic as the headline cell price drops suggest — prices are falling, but slowly.
Not necessarily. If you add an AC-coupled battery (the most common retrofit option), it comes with its own battery inverter and works alongside your existing solar inverter. If you want a DC-coupled system for higher efficiency, you would need a hybrid inverter that can manage both solar panels and battery storage — which may mean replacing your current solar inverter. Check with your installer which approach suits your existing setup.
Right size first. Quotes second.
Usage in, recommended capacity out. Then, if you want them, up to three quotes from vetted installers.