How Much Do Solar Battery Storage Installers Cost?
Adding storage lets you use more of your own solar and buy cheap off-peak power. In 2026, solar battery storage installers in the UK charge £2,500-£8,000 fitted. A 5kWh battery is around £2,500-£4,000 installed, 10kWh is £5,000-£8,000, with £500-£1,200 of that being installation labour. Retrofitting to an existing solar system usually costs a little more than adding a battery during a new install. Here is the full 2026 ladder.
Solar Battery Cost by Capacity & Install Type
Total price is mostly the battery itself, then installation labour, a hybrid or AC-coupled inverter if needed, and any consumer-unit or wiring work. Bigger batteries cost more but usually less per kWh. Prices below include supply and fitting by an MCS-registered installer.
Small battery (about 5kWh)
£2,500-£4,000 installed. Suits a smaller home or modest solar array. Covers evening use and off-peak charging for a 1-2 bedroom property.
Mid battery (about 10kWh)
£5,000-£8,000 installed. The popular sweet spot for a typical 3-4 bed home with a 4kWp+ solar array. Best balance of cost and daily coverage.
Large battery (13kWh+)
£7,000-£11,000+ installed. For high users, larger arrays or those maximising off-peak tariff arbitrage. Cost per kWh is usually the lowest here.
Installation labour
£500-£1,200 of the total. Covers mounting, wiring, commissioning and MCS paperwork. Awkward routing or a consumer-unit upgrade adds to this.
Retrofit vs new install
Adding a battery to existing panels is straightforward but may need an AC-coupled or hybrid inverter change (£800-£2,000). Fitting alongside a new solar system shares scaffolding and labour.
VAT and what is included
Domestic battery storage qualifies for 0% VAT in 2026. Quotes should include battery, inverter/coupling, wiring, commissioning, warranty and MCS certification.
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