Battery Storage Cost UK 2026: Prices, Sizes and What to Expect
Home battery storage costs between £2,500 and £8,000 in the UK, depending on capacity and brand. A typical 5kWh battery costs £3,500-£4,500 installed, while a 9.5kWh system costs £5,500-£7,000. When installed alongside solar panels, battery costs reduce due to shared installation labour—a 10-panel solar system with 5kWh battery costs £6,500 total compared to £5,500 for solar alone plus £4,000 for standalone battery retrofit.
£2,500
2.6kWh Entry Level
£4,000
5kWh Average Home
£6,250
9.5kWh Large Home
£8,500
13kWh Premium
Battery Storage Prices by Capacity
| Capacity | Price Range | Best For | Storage Hours* |
|---|---|---|---|
| 2.6kWh | £2,500-£3,500 | Small households, budget option | 2-3 hours |
| 5kWh | £3,500-£4,500 | Average households, 2-3 people | 4-5 hours |
| 9.5kWh | £5,500-£7,000 | Larger households, 4+ people | 8-10 hours |
| 13kWh | £7,500-£9,500 | High usage, EV owners | 12-14 hours |
| 16kWh+ | £9,000-£12,000 | Very high usage, off-grid backup | 16+ hours |
*Storage hours based on average evening consumption of 1-1.2kWh per hour
What Affects Battery Storage Cost?
Five factors determine your final battery installation price.
1. Battery Capacity (kWh)
Capacity is the primary cost driver. Larger batteries store more energy but cost proportionally more.
| Capacity | Typical Cost | Cost per kWh |
|---|---|---|
| 2.6kWh | £3,000 | £1,154/kWh |
| 5kWh | £4,000 | £800/kWh |
| 9.5kWh | £6,250 | £658/kWh |
| 13kWh | £8,500 | £654/kWh |
Larger batteries offer better value per kWh stored.
2. Installation Type
How the battery connects affects installation complexity and cost.
| Installation Type | Price Impact | Notes |
|---|---|---|
| With new solar (hybrid inverter) | Baseline | Most cost-effective |
| Retrofit to existing solar | +£500-£1,500 | May need inverter upgrade |
| Standalone (no solar) | +£300-£800 | Requires separate inverter |
| AC-coupled to existing | +£800-£1,200 | Works with any solar system |
Installing battery alongside new solar panels saves £500-£1,500 compared to retrofitting later.
3. Brand and Quality
Battery brands vary in price, warranty, and features.
| Brand Tier | Price Impact | Warranty | Examples |
|---|---|---|---|
| Premium | +15-25% | 10-12 years | Tesla Powerwall, Sonnen |
| Mid-range | Baseline | 10 years | GivEnergy, Pylontech |
| Budget | -10-20% | 5-7 years | Various imports |
Greentech Renewables installs GivEnergy batteries—excellent mid-range quality with 10-year warranties and strong UK support.
4. Inverter Requirements
Your existing or new inverter affects battery compatibility and cost.
| Scenario | Inverter Need | Cost Impact |
|---|---|---|
| New hybrid inverter (with solar) | Included in solar price | £0 additional |
| Existing hybrid inverter | Battery connects directly | £0 additional |
| Existing string inverter | Need AC-coupled battery OR new hybrid | +£800-£1,500 |
| No solar system | Battery includes inverter | Included |
5. Electrical Upgrades
Older properties may need electrical work to accommodate battery systems.
| Requirement | When Needed | Typical Cost |
|---|---|---|
| Consumer unit upgrade | Older fuse boxes | £300-£600 |
| Meter upgrade | Incompatible meters | £0 (supplier provides) |
| Cable upgrades | Long cable runs | £100-£300 |
| Earthing improvements | Failed inspection | £150-£300 |
Our survey identifies any electrical requirements before quoting.
Battery Storage Costs: With vs Without Solar
Battery Installed with New Solar
Most cost-effective option—shared installation labour and single inverter.
| Package | Price | Includes |
|---|---|---|
| 10 panels + 5kWh battery | £6,500 | Hybrid inverter, full installation |
| 10 panels only | £5,500 | Hybrid inverter (battery-ready) |
| Battery cost within package | ~£1,000 | Marginal cost only |
The marginal cost of adding a battery to a new solar installation is approximately £1,000-£1,500 for a 5kWh unit—far less than standalone prices.
Battery Retrofit to Existing Solar
More expensive due to separate installation visit and potential inverter changes.
| Scenario | Battery Cost | Installation | Total |
|---|---|---|---|
| Existing hybrid inverter | £2,500-£3,500 | £400-£600 | £2,900-£4,100 |
| Existing string inverter | £2,500-£3,500 | £1,200-£1,800 | £3,700-£5,300 |
| Full system replacement | £3,500-£5,000 | £800-£1,200 | £4,300-£6,200 |
Battery Without Solar (Standalone)
Batteries can operate without solar panels, charging from cheap overnight grid electricity.
| Configuration | Price | Use Case |
|---|---|---|
| 5kWh standalone | £4,500-£5,500 | Tariff arbitrage, backup power |
| 9.5kWh standalone | £6,500-£8,000 | Higher capacity arbitrage |
Standalone batteries make financial sense with time-of-use tariffs like Octopus Go or Intelligent, charging at 7-10p/kWh overnight and avoiding 24-34p/kWh peak rates.
Battery Storage Price by Brand
GivEnergy
| Model | Capacity | Price (Installed) | Warranty |
|---|---|---|---|
| GivEnergy 2.6kWh | 2.6kWh | £2,800-£3,200 | 10 years |
| GivEnergy 5.2kWh | 5.2kWh | £3,800-£4,300 | 10 years |
| GivEnergy 9.5kWh | 9.5kWh | £5,800-£6,500 | 10 years |
| GivEnergy All-in-One | 5kWh + inverter | £4,500-£5,200 | 10 years |
GivEnergy offers strong UK support, excellent app monitoring, and compatibility with most solar systems. Greentech Renewables is an approved GivEnergy installer.
Tesla Powerwall
| Model | Capacity | Price (Installed) | Warranty |
|---|---|---|---|
| Powerwall 3 | 13.5kWh | £9,500-£11,500 | 10 years |
Tesla Powerwall offers premium build quality and seamless app integration but commands a price premium. Best suited to high-usage households wanting a single large battery.
Pylontech
| Model | Capacity | Price (Installed) | Warranty |
|---|---|---|---|
| US3000C | 3.5kWh | £2,200-£2,800 | 10 years |
| US5000 (×2) | 7.1kWh | £3,800-£4,500 | 10 years |
Pylontech batteries are modular—you can stack multiple units. Good value option for medium-large capacity needs.
Sigenergy
| Model | Capacity | Price (Installed) | Warranty |
|---|---|---|---|
| SigenStor 5kWh | 5kWh | £4,200-£4,800 | 10 years |
| SigenStor 10kWh | 10kWh | £6,500-£7,500 | 10 years |
Premium European brand with excellent efficiency ratings.
Is Battery Storage Worth the Cost?
Battery storage payback depends on how you use it.
Payback Scenarios
| Use Case | Annual Benefit | Payback (5kWh at £4,000) |
|---|---|---|
| Solar self-consumption only | £200-£350 | 11-20 years |
| Solar + SEG optimisation | £300-£450 | 9-13 years |
| Solar + time-of-use tariff | £400-£550 | 7-10 years |
| Tariff arbitrage (no solar) | £250-£400 | 10-16 years |
Best returns come from combining solar generation with time-of-use tariffs like Octopus Flux.
When Battery Storage Is Worth It
Strong case:
- You have or plan solar panels
- You use most electricity in evenings
- You're on or willing to switch to time-of-use tariff
- You want blackout protection
- You're installing solar anyway (marginal cost is low)
Weaker Case
- • Home all day using electricity as solar generates
- • Very low electricity consumption
- • Tight budget without solar plans
- • Property unsuitable for solar
Reducing Battery Storage Costs
Install with Solar
Adding battery to a new solar installation costs £1,000-£1,500 marginal—compared to £3,500-£5,000 for standalone retrofit. If you're considering solar, include battery from the start.
View Solar PackagesRight-Size Your Battery
Oversized batteries waste money. A 5kWh battery suits most households with 10-panel solar systems. Only go larger if you have high evening usage or plan to add an EV.
Size your battery correctly →Use Finance
Greentech Renewables offers 0% APR finance over 1-2 years. A 5kWh battery at £4,000 costs £167/month over 24 months—often less than the monthly savings it generates.
Calculate finance options →Future Grants
The Warm Homes Plan includes battery storage for low-income households. A £2,500 heat battery grant launches in 2026/27. Future Consumer Loan Scheme (April 2027) will offer government-backed financing.
Check grant eligibility →What's Included in Battery Installation
Greentech Renewables Battery Package
Included
| Included | Details |
|---|---|
| Battery unit | Specified capacity, 10-year warranty |
| Mounting and fixings | Wall or floor mounted |
| DC cabling | Connection to inverter |
| AC wiring | Connection to consumer unit |
| System commissioning | Testing and configuration |
| App setup | Monitoring and control |
| User training | Handover session |
| MCS certification | Required for some grants/tariffs |
Not Included (If Applicable)
| Item | When Required | Cost |
|---|---|---|
| Inverter upgrade | Incompatible existing system | £800-£1,500 |
| Consumer unit upgrade | Older installations | £300-£600 |
| Extended cable runs | Battery far from inverter | £100-£300 |
Frequently Asked Questions
Related Pages
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