Tesla Battery Review
premiumThe Tesla Powerwall is the world's most recognisable home battery. The Powerwall 3 integrates a solar inverter, battery, and backup gateway in a single unit. In the UK it typically costs £9,500-10,500 installed (quotes across the market run roughly £7,500-11,500). Premium pricing, but a complete, polished package with industry-leading brand recognition and a mature app ecosystem.
£9,500-£10,500
Installed price range
10 years
Warranty period
United States
Country of origin
1
Products available
Tesla Battery Models
Prices are GBP installed, 0% VAT included, indicative June 2026. Specs are indicative and a dash means the figure is not listed here - confirm current models with your installer.
| Model | Capacity | Peak Output | Continuous | Chemistry | Weight | Backup | Price |
|---|---|---|---|---|---|---|---|
| Tesla Powerwall 3 | 13.5kWh | 11.5kW | 5kW | LFP (Lithium Iron Phosphate) | 130kg | Yes | £9,500-£10,500 |
Warranty Details
Duration
10 years
Capacity retention
70% at end of warranty
Pros
- Most recognised battery brand globally
- Integrated solar inverter (no separate inverter needed)
- Excellent app and monitoring
- Storm Watch auto-charges before bad weather
- LFP chemistry (safer, longer cycle life)
Cons
- Most expensive unit in this set
- Requires a Tesla-certified installer
- Cannot retrofit to all existing solar inverters
- Single fixed capacity per unit (13.5 kWh steps)
Compare Tesla with Other Brands
Frequently Asked Questions
How much does a Tesla battery cost in the UK?
A Tesla battery costs £9,500-£10,500 fully installed in the UK, with 0% VAT already included (indicative June 2026). There is no battery purchase grant in the UK, so the quoted price is the full story. The 0% VAT rate on residential battery installations runs until 31 March 2027 (then 5%) and is typically worth £1,000-3,000 versus the standard 20% rate.
What warranty does Tesla offer?
Tesla offers a 10-year warranty, guaranteeing at least 70% capacity retention. Warranty terms vary by model and configuration - confirm the current terms with your installer.
Is Tesla a good battery for UK homes?
Tesla is homeowners wanting a premium, all-in-one solution with the best app experience. The Tesla Powerwall is the world's most recognisable home battery. The Powerwall 3 integrates a solar inverter, battery, and backup gateway in a single unit.