By the Solar Battery UK – The Independent Home Storage Authority Team · Updated May 2026 · Independent, reader-supported

How Much Does Home Battery Storage Cost in the UK? (2025 Price Breakdown)

Home battery storage systems have become a realistic investment for UK householders wanting to maximise self-consumption of solar energy or simply gain energy security. But the upfront cost is substantial, and pricing varies significantly depending on system size, installer, and site conditions. Here's what you're actually looking at.

Total system costs: the broad picture

A typical domestic battery system installed by a qualified MCS (Microgeneration Certification Scheme) installer costs between £4,500 and £12,000. This wide range reflects the main factor: system capacity. A small 5kWh battery will cost less than a 10kWh or 15kWh unit, but your savings potential also scales with size.

Most UK installations sit in the 5–10kWh sweet spot. A 5kWh system typically costs £5,000–£7,500 installed. A 10kWh system runs £8,000–£11,000. If you go larger (15kWh+), expect £11,000–£15,000 or more, depending on whether you're adding it to existing solar or starting fresh.

These figures include hardware and labour. They assume straightforward roof or ground access and no major complications.

Hardware: the battery and inverter

The battery itself—the actual storage unit—accounts for roughly 40–50% of the system cost. A 5kWh lithium battery typically costs £2,000–£3,000 wholesale; retail prices including VAT run £2,400–£3,600. A 10kWh battery sits at £4,500–£6,000 installed cost.

Popular models include the Tesla Powerwall (13.5kWh, around £10,000–£11,000 fitted), LG Chem RESU, Generac PWRcell, and various Chinese brands like Deye and Goodwe. UK-based installers often stock 2–3 trusted brands; some will source others to order.

The inverter—which converts DC power from your battery to AC for home use—is bundled into this cost. Integrated battery-inverter systems (a single unit doing both jobs) are increasingly common and slightly cheaper than separate components.

Installation labour: the second major cost

Professional installation labour typically runs £1,500–£3,000, depending on job complexity. Straightforward installations in properties with easy roof or wall access cost less; difficult access, multiple electrical upgrades, or rewiring of your main consumer unit will push labour higher.

This covers:

• Electrical work and certification
• Safety disconnect installation
• Wiring and cable management
• Integration with existing solar (if applicable)
• Testing and handover

Expect the installer to spend 1–2 days on-site. MCS-registered installers charge between £80 and £150 per hour for labour, though most quote a fixed job price.

DNO notification and G98/G99: usually free, but not always

If your battery is connected to the grid alongside solar (the standard setup), your installer must notify your District Network Operator (DNO) using either the G98 process (for systems up to 3.68kW) or G99 (for larger systems).

This is an administrative notification, not permission—you don't need to wait for approval, though DNO response times vary (typically 2–4 weeks). The notification itself costs nothing; your installer handles it as part of the job. However, if your DNO requests equipment modifications (unheard of for residential batteries, but theoretically possible), you'd bear that cost.

Scaffolding and difficult access

If your home requires scaffolding to safely access the roof or external wall where the battery will be mounted, expect an additional £400–£800. This is common on terraced properties or homes where roof access is genuinely unsafe without it.

Some installers include minor scaffold costs in their quote; others invoice separately. Always ask upfront.

For ground-mounted systems (common in homes without suitable roof space), labour and groundwork costs rise slightly, but scaffolding is avoided.

Cost per kWh: how to compare systems fairly

A useful metric is the installed cost per kilowatt-hour of storage capacity.

• 5kWh system at £6,500 = £1,300 per kWh
• 10kWh system at £9,500 = £950 per kWh
• 15kWh system at £13,000 = £867 per kWh

Larger systems are more cost-efficient per unit of storage. However, you only benefit if you use that capacity. A 15kWh battery on a semi-detached house where you generate 12kWh daily might be overkill.

What moves the needle on price

Battery brand and chemistry: Established brands (Tesla, LG, Generac) command a premium. Newer Chinese manufacturers cost 15–25% less but may have less UK track record for support and warranty claims.

Installer reputation and region: London and South East installers tend to charge more. Rural areas with fewer competitors may also carry higher labour rates. Well-known local installers with strong reviews often charge at the market rate; cowboys undercut wildly.

Existing solar integration: Adding a battery to a property with existing solar costs less than installing both simultaneously, because much of the electrical infrastructure is already in place.

Warranty and monitoring: Premium systems include 10–15-year hardware warranties and remote monitoring apps. Budget systems may offer 5–7 years and basic monitoring.

Getting realistic quotes

Request quotes from 2–3 MCS installers (searchable on the MCS website). Genuine quotes should itemise:

• Battery model and capacity
• Inverter specification
• Labour and time estimate
• Scaffolding (if needed)
• G98/G99 notification cost (usually nil, but confirm)
• Warranty length and what's covered
• Estimated payback period based on your usage

Be wary of quotes that seem far below or above the typical range without clear explanation. The cheapest isn't always the worst, but a suspiciously low quote often means corners will be cut elsewhere—poor cable routes, weak warranty terms, or insufficient testing.

Prices in 2025 remain broadly stable. Battery costs have plateaued rather than dropping sharply, though occasional promotions or bundle deals (solar + battery) can shift the equation. Expect the cost and complexity to remain much as described here for the coming year.