Battery pricing comparison
Home Battery Storage Cost UK 2026
Home battery storage in 2026 ranges £6,800–£9,400 fitted depending on chemistry, capacity, and brand. Here's the full UK price comparison plus the spec, warranty, and financial model behind each option.
880 UK searches per month
What you pay
Price ranges
| Specification | Price range |
|---|---|
| EcoFlow PowerOcean 5 kWh fitted | £6,800 |
| EcoFlow PowerOcean 10 kWh | £8,200 |
| EcoFlow PowerOcean 15 kWh | £9,400 |
| Tesla Powerwall 3 (13.5 kWh) | £7,400 – £8,400 |
| GivEnergy AIO (13.5 kWh, UK-built) | £7,800 – £8,600 |
| GivEnergy Gen3 + 9.5 kWh battery | £8,200 – £9,200 |
| SolarEdge Home Battery 9.7 kWh | £8,400 – £9,200 |
Where the money goes
Cost breakdown
| Component | % of cost |
|---|---|
| Battery hardware | 70% |
| Inverter (if not integrated) | 8% |
| Installation labour | 10% |
| DNO paperwork + MCS commissioning | 4% |
| Margin + overheads | 8% |
What changes the price
Variables
- Chemistry — LFP vs NMC LFP (Powerwall 3, PowerOcean, AIO) is safer, longer warranty. NMC slightly more energy-dense but rarer in 2026.
- Outdoor vs indoor PowerOcean IP65 outdoor saves indoor space; Powerwall 3 indoor only.
- AC-coupled vs DC-coupled AC adds to existing solar with no inverter swap; DC requires hybrid inverter (£1,400–£1,800 extra).
- Warranty length Best: PowerOcean 15 yr · AIO 12 yr · Powerwall 3 10 yr · SolarEdge 10 yr.
Return on investment
Payback model
Annual savings and payback by tariff combination. Modelled against typical UK consumption profile.
| Setup | Annual saving | Payback |
|---|---|---|
| Powerwall 3 retrofit, Octopus Flux | £600–£800 | 10–12 years |
| PowerOcean 10 kWh retrofit, Flux | £550–£750 | 10–12 years |
| AIO retrofit, Flux | £600–£800 | 10–12 years |
Common questions
FAQs
Tesla vs EcoFlow vs GivEnergy?
Tesla wins on app polish + Storm Watch. EcoFlow wins on warranty (15 yr) + outdoor mounting. GivEnergy wins on UK-built supply chain and integrated all-in-one. All three are LFP chemistry — no thermal runaway risk.
Can I add battery to existing solar?
Yes — AC-coupled retrofit. Compatible with any solar inverter regardless of who installed it. 6–8 hour fit with DNO paperwork.
How big a battery do I need?
Domestic rule of thumb: 1 kWh storage per kWp solar. So 4 kWp solar pairs with 5 kWh battery, 6 kWp pairs with 6–10 kWh, 10 kWp pairs with 13.5 kWh.
Related guides
Compare other systems
Get a fixed-price quote
Free survey within 5 working days. MCS certified, RECC accredited. 11,000+ installations across the UK.