Powerwall 3 pricing
Tesla Powerwall 3 Cost UK 2026
Tesla Powerwall 3 is £7,400 fitted as a retrofit to existing solar, or £14,500 as a 4 kW solar + battery bundle. We install 5 every week through our Salford depot.
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What you pay
Price ranges
| Specification | Price range |
|---|---|
| Powerwall 3 only (battery, no solar) | £7,400 – £8,400 |
| Powerwall 3 + 4 kW solar bundle | £14,500 – £16,200 |
| Powerwall 3 + 6 kW solar bundle | £15,800 – £17,500 |
| Powerwall 3 + 1× expansion (27 kWh total) | £12,800 – £14,200 |
| Powerwall 3 with whole-home backup gateway | Add £1,200 – £1,500 |
Where the money goes
Cost breakdown
| Component | % of cost |
|---|---|
| Powerwall 3 unit (Tesla) | 70% |
| Whole-home backup gateway | 8% |
| Installation labour | 10% |
| Paperwork + commissioning | 4% |
| Margin + overheads | 8% |
What changes the price
Variables
- Backup gateway optional £1,200–£1,500 extra; without it Powerwall 3 still backs up partial loads
- Stock availability 4–6 week wait typical; we hold stock for 1–2 immediate installs/month
- Wall mounting prep Free if wall ready; +£100–£200 if reinforcing needed
- AC vs DC coupling AC retrofit standard; DC swap requires inverter change £1,400–£1,800 extra
Return on investment
Payback model
Annual savings and payback by tariff combination. Modelled against typical UK consumption profile.
| Setup | Annual saving | Payback |
|---|---|---|
| Powerwall 3 + 4 kW solar, Octopus Flux | £1,184 | 12 years |
| Powerwall 3 retrofit (existing solar), Flux | £600+ | 12 years |
Common questions
FAQs
Is Powerwall 3 better than Powerwall 2?
For new installs, yes. Powerwall 3 has integrated solar inverter (saves £900–£1,200), 11.5 kW continuous output (vs 5 kW for Powerwall 2), and the same 10-year warranty. Powerwall 2 still works fine if already installed.
Will Storm Watch keep my freezer running?
Yes — Storm Watch tops the battery to 100% before forecasted storms. With backup gateway fitted, essential circuits stay live during outage. Without gateway, you get partial backup of dedicated circuits.
How long is the Powerwall 3 wait?
Through certified installers, 4–6 weeks from deposit. We sometimes hold 1–2 units in stock — ask when enquiring.
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