Cost and whether it pays
What a home battery costs
Not a government service. UKSolars is an independent company. It is not affiliated with, endorsed by or acting on behalf of the UK Government, DESNZ, Ofgem, MCS or any local authority. We do not administer any grant scheme, we cannot approve an application, and we never charge for anything a government provides free.
How we are paid. We are paid a fee by installers when we introduce a homeowner who asks for a quote. It does not change your price, and we are not paid more by one installer than another for the same job. In full.
Short answer
Energy Saving Trust says battery storage can range from £1,500 to £10,000 and gives about £4,600 for a 5kWh system. Your price depends on usable capacity, power output, inverter and electrical work. Compare like-for-like installed quotes and check the warranty rather than buying on headline capacity alone.
- EST broad range
- £1,500–£10,000
- EST 5kWh example
- About £4,600
- Compare
- Usable capacity, not nominal
- Current installed VAT
- 0% to 31 March 2027
The cheapest battery is not necessarily the cheapest useful installation. Ask each company to quote the same usable capacity, power output and installation scope.
What changes the price
- Usable capacity: the energy available to the home after the battery’s operating limits.
- Power output: how much equipment it can support at once.
- AC or DC coupling: particularly important when adding storage to existing panels.
- Backup supply: ordinary batteries often stop during a power cut unless specific backup equipment and circuits are included.
- Electrical work: consumer-unit changes, cable routes and network paperwork vary by home.
- Warranty: compare covered years, throughput or cycles, retained capacity and labour terms.
Ask for the installed total
The quote should state the battery and inverter models, usable capacity, power rating, VAT, electrical work, commissioning, monitoring and network paperwork. A hardware-only price is not comparable with a finished installation.
Check value as well as price
A battery saves money only when it can repeatedly move useful electricity from one time to another. Compare your solar surplus, evening use, import tariff and forgone export payment. Then read whether a battery is worth it and how to choose a size.
Common questions
How much does a 5kWh solar battery cost?
Is a solar battery zero-rated for VAT?
Sources
Checked 2026-09-09. Rates, rules and eligibility can change. Confirm current terms before signing a contract or applying for funding.
Work out the number before anyone quotes you
Every assumption editable, nothing sent anywhere, no email. It will not give you a quote, but it will tell you whether one is fair.
We are not taking quote requests yet
We will not collect your details until we can name the installers who would receive them, so there is no form here to fill in. What we can do is tell you when something changes: a scheme opening, an export rate moving, or the quote form going live.