What do solar panels cost with a battery?
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Panels and battery together
| System | Panels only | With a smaller battery | With a larger battery |
|---|---|---|---|
| 8 panels, 3 kW | £4,700 – £5,300 | £6,200 – £7,300 | £7,700 – £10,300 |
| 10 panels, 3.75 kW | £5,800 – £6,500 | £7,300 – £8,500 | £8,800 – £11,500 |
| 12 panels, 4.5 kW | £7,000 – £7,800 | £8,500 – £9,800 | £10,000 – £12,800 |
| 16 panels, 6 kW | £9,200 – £10,300 | £10,700 – £12,300 | £12,200 – £15,300 |
These are the panels and the battery fitted together on one visit. The two sizes are the two in our price list; the installer confirms the battery’s capacity in kWh and which one suits how you use electricity.
Installing solar panels is zero-rated for VAT until 31 March 2027, so there is no VAT to add to these figures. From 1 April 2027 the rate is 5% and the same system will cost a little more.
Do you need a battery?
No. Panels work without one: what you do not use as it is made goes to the grid. A battery keeps some of the daytime electricity for the evening, when most homes use the most.
Whether that is worth its price depends on when you are at home, your tariff and the size of the system, which is why the battery is always shown as its own line and never folded into the panel price.
What is included in these prices
The panels and their fitting, the scaffolding to reach the roof, and VAT at the rate that applies today.
Not included: a battery, an EV charger, roof repairs, anything structural.
Planning estimate or quotation?
Every figure on this page is a planning estimate: what a system like this typically costs, for budgeting and for judging the quotes you get. It is not a quotation. A quotation comes from an installer after a survey, when your roof, your wiring and any shading are known.
Facet Pro narrows the estimate to your own roof from aerial imagery: enter your address and we count the panels that fit the slopes facing the sun. Your installer confirms the system and price on site.
Common questions
How much is a solar battery in the UK?
About £1,500 to £2,000 for a smaller battery and £3,000 to £5,000 for a larger one, fitted with the panels.
How much are solar panels with a battery?
About £7,300 to £11,500 for a typical 3.75 kW system, depending on the battery.
Can I add a battery later?
Usually, yes. Fitting it at the same time as the panels saves a second visit; ask the installer whether the inverter they fit will take a battery later.
Your roof isn’t average.
See how many panels fit your own roof, with a planning estimate. Any figure on this page is for a typical roof. Enter your address and we read your roof from aerial imagery: which slopes face the sun, how steep they are and how much room they have.
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These are planning estimates — not a quotation, and not a survey. Solar figures come from an installer price list checked against government solar cost data, with scaffolding included and VAT at the rate that applies today. They do not estimate what panels will save. Your installer confirms the system and price on site. Prices checked November 2026.