Solar battery cost in 2026 How much does a solar battery cost?
Home batteries range from about £1,500 to £10,000 fitted, according to the Energy Saving Trust, with a 5 kWh system around £4,600. The size you need, your inverter and where the battery goes make the difference.
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The short answer
Prices by battery size
| Battery size | Guide price, installed | Suits |
|---|---|---|
| 5 to 7 kWh | £4,000 to £6,000 | Smaller homes, or modest evening use |
| 8 to 10 kWh | £6,000 to £8,000 | A typical family home |
| 10 to 13 kWh | £8,000 to £10,000 or more | High evening use, an electric car or heat pump |
Guide prices from iHeat's 2026 battery price guide, an installer site. The Energy Saving Trust says a typical home battery is about 10 kWh, and its 5 kWh figure of around £4,600 sits at the lower end of these ranges.
With new panels, or on its own?
The same battery costs less when it goes in alongside new panels, because the scaffolding, our electrician's visit and often the inverter are shared.
| How it's fitted | Guide price | Source |
|---|---|---|
| Added to panels you already have | £4,000 to £8,000 or more | Heatable |
| Added, and the old inverter replaced too | £6,000 to £8,000 or more | Heatable |
| New panels and a battery together | £10,000 to £16,000 | iHeat and Heatable |
| One supplier's battery: alone vs with panels | £2,910 vs £1,680 | Which? |
Adding a battery to existing panels · Panels and a battery together
What moves the price
Usable capacity
Batteries never fully empty, so the usable figure is lower than the headline one. Compare quotes on usable kWh, not the number on the box.
The inverter
With a hybrid inverter already in place, a battery can plug straight in. Without one, you need either a battery with its own inverter (AC-coupled) or a new hybrid inverter. Both add cost.
Backup in a power cut
Most batteries don't power your home in a power cut unless backup equipment is added. If you want that, it adds to the price.
Where it goes
The home battery safety standard, PAS 63100, prefers batteries outdoors. Indoor spots must meet extra fire-safety requirements, and lofts, bedrooms and escape routes are ruled out. Long cable runs from the fuse board add cost too.
The brand and warranty
Warranties are often 10 years. A longer warranty, or a brand with a strong UK support record, is worth paying something for. A warranty is only as good as the company behind it, so ask any installer who stands behind the warranty you're being offered, and what happens if the manufacturer stops trading.
Will a battery pay for itself?
Sometimes. The Energy Saving Trust says battery savings won't always be enough on their own to justify the cost. The maths works best when:
- you'd otherwise export lots of solar for a few pence a unit, then buy it back in the evening at around 26p
- you can charge the battery overnight on a cheap tariff and use that power at peak times
- you have an electric car or heat pump, so your use is high
A battery also lasts less time than the panels. The Energy Saving Trust puts typical battery life at 10 to 12 years, against 25 years or more for panels, so allow for a replacement. Our guide are solar batteries worth it? works through examples.
VAT, grants and loans for batteries
- 0% VAT on batteries fitted to homes in Great Britain until 31 March 2027, including batteries added to existing panels and batteries charged from the grid. It applies when the installer supplies and fits it.
- Warm Homes: Local Grant. Can fund a battery for eligible lower-income households, but only alongside solar panels.
- Warm Homes Loan Scheme. Government-subsidised loans of up to £15,000 for a battery, through approved lenders. When we checked on 11 October 2026, no lenders had been named.
More in our grants guide.
Getting a price from us
We size the battery to how your household actually uses electricity, then quote the battery, any inverter work and the installation as separate lines. If panels alone, or a smaller battery, would serve you better, we'll say so. Our solar and battery systems start from £7,500 fully installed (10 panels, a Fox ESS battery and scaffolding to one side), or from £4,995 for solar panels on their own.
Our customers' reviews mention a 10 kWh battery and an EcoFlow system among the batteries we've fitted.
Questions people ask
How much is a battery for solar panels?
Most cost between £4,000 and £10,000 fitted, depending on size. The Energy Saving Trust puts a 5 kWh system at around £4,600. Bigger batteries and ones that need a new inverter cost more.
Is it worth paying more for a bigger battery?
Only if you'll fill it and use it. A battery bigger than your evening use, or than your panels can fill, spends much of the year part-empty unless you charge it on a cheap overnight tariff.
Do batteries get 0% VAT?
Yes, on homes in Great Britain until 31 March 2027, when supplied and fitted by an installer. That includes batteries added to existing panels.
Are there grants for solar batteries?
Only in limited cases. The Warm Homes: Local Grant can fund a battery for eligible households alongside solar panels. Government-backed low-interest loans of up to £15,000 for batteries are due through approved lenders.
How long does a home battery last?
Typically 10 to 12 years, according to the Energy Saving Trust, and warranties are often 10 years. Expect to replace a battery once in the life of your panels.
Read next
Sources
Figures and rules on this page were checked on 11 October 2026. Schemes, tariffs and prices change, so check the latest before you decide.
- Energy Saving Trust: Battery storage, updated 6 October 2026
- Energy Saving Trust: Solar panels, costs, savings and benefits, updated 1 October 2026
- MCS: Battery storage, updated 8 July 2026
- Which?: Solar panel battery storage, 15 May 2026
- iHeat: Solar battery storage costs in the UK (installer guide prices), updated 21 May 2026
- Heatable: Solar battery storage prices UK (installer marketplace guide prices), updated 9 June 2026
- BSI: PAS 63100:2024, fire protection of home battery systems, March 2024
- HMRC: VAT on energy-saving materials and heating equipment (Notice 708/6), zero rate runs to 31 March 2027
- GOV.UK: Warm Homes: Local Grant policy guidance, July 2026
- GOV.UK: Warm Homes Loan Scheme rules, September 2026
- Ofgem: Energy price cap, 1 October to 31 December 2026, 26 August 2026
Get a battery price for your home
Tell us whether you have panels already and roughly how you use electricity. We'll talk it through, size the battery to your evenings, and send a written quote with no pressure to sign.
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