Global Market Rank
The single most recognised residential battery brand globally, setting the industry benchmark for smart home energy integration.
Battery storage
Tesla Powerwall 3 battery storage.
Powerwall 3 with a built-in 11.04kW hybrid inverter, 13.5kWh per unit and expandable to 54kWh, run from the Tesla app.
- 13.5kWhper Powerwall 3
- 54kWhwith three expansion packs
- 10yrproduct warranty
- 11.04kWbuilt-in hybrid inverter
Brand profile
Brand history & corporate profile.
Founded in 2003, Tesla, Inc. (Stock Code: TSLA) is the undisputed global pioneer in clean energy transition, electric vehicles, and smart energy storage. By choosing Tesla, you are equipping your home with the world’s most recognised and technologically advanced battery system, backed by software that continuously learns and optimises your home’s energy footprint.
Key data
Key data & performance metrics.
Production Scale
Gigafactory manufacturing capability, ensuring high-volume global distribution and industry-leading hardware refinement.
Publicly Traded Transparency
Traded on the NASDAQ (TSLA), ranking as one of the world's most valuable companies with unmatched capital resources for continuous software and hardware R&D.
High Efficiency & Yield
The Powerwall 3 delivers an exceptional 97.5% solar-to-home round-trip efficiency, paired with an integrated 11.04kW continuous output hybrid inverter.
UK Field Leadership
Extensive certified installer network across the UK, full integration with Octopus Energy tariffs, and localised grid-compliance engineering.
Recognition
Independent recognition.
| Recognition body | Rating / award | What it means for your project |
|---|---|---|
| Global Financial Markets | Blue-Chip Technology Pioneer | Unprecedented corporate stability, ensuring your 10-year warranty is backed by one of the largest tech companies on earth. |
| Which? & Consumer Ranks | Top Rated Smart Home Battery | Recognised for possessing the most advanced, user-friendly, and responsive software application on the market. |
| UK Grid Integrators | G98 / G99 Certified | Fully compliant and optimised for the UK National Grid, including rapid automated response to grid frequency events. |
| Independent Testers | Best-in-Class Weatherproofing | IP67 outdoor rating and thermal management capable of operating flawlessly in extreme weather from -20°C to 50°C. |
A brand you can trust
Built for long-term performance.
Safety First
The Powerwall 3 uses advanced LFP (Lithium Iron Phosphate) chemistry for maximum safety, thermal endurance, and a 100% depth-of-discharge capability.
Smart Energy Management
The Tesla App is the gold standard for energy monitoring, featuring predictive weather charging (Storm Watch) and time-based control algorithms.
Scalable Design
Seamlessly expand your system with up to three 13.5kWh DC Expansion packs per Powerwall 3 (scaling up to 54kWh on a single phase).
Reliable Backup Power
Keep essential circuits running during grid outages when installed with backup functionality.
Backup power needs additional infrastructure to be installed. Please ask us for prices.
Our recommendation
Why Synergy Power recommends Tesla
Why we recommend it
- Industry-leading smart software and continuous over-the-air updates
- Integrated 11.04kW hybrid inverter for heavy-duty household loads
- Unmatched brand prestige and aesthetic design
- Extreme weather resistance (IP67) for versatile outdoor installation
- Deep integration with smart UK energy tariffs
Available capacities
- 13.5kWh (Single Powerwall 3)
- 27kWh (Powerwall 3 + 1 DC Expansion Pack)
- 40.5kWh (Powerwall 3 + 2 DC Expansion Packs)
- 54kWh (Powerwall 3 + 3 DC Expansion Packs)
Ideal for
- Total home energy independence and high-demand households
- Whole-home automated smart monitoring
- Multiple EV charging optimisation
- Complete ecosystem integration (Tesla vehicles, Wall Connector)
Product range
Tesla Residential Battery Range (UK 2026)
| Model | Usable capacity | Type | Typical application | Key features |
|---|---|---|---|---|
| Powerwall 3 | 13.5kWh usable | Integrated LFP hybrid system | Medium-to-large domestic | Built-in 11.04kW inverter, 3 MPPTs, IP67 flood resistant, Storm Watch software. |
| Powerwall 3 DC Expansion | 13.5kWh usable | LFP expansion module | High-demand domestic / light commercial | Cheaper "plug and play" battery blocks that share the main Powerwall 3 inverter. |
Photos
Tesla in detail.
Tesla Powerwall 3 installed at Rose Croft, Kenilworth
Tesla Powerwall 3 installed at Manor Road, Leicester
Tesla Powerwall 3 and Gateway at Manor Road, Leicester Compare brands
Tesla Powerwall installation Other batteries we install.
Battery quote
Is Tesla right for your home?
Tell us about your home, your solar and how you use electricity, and we will recommend the right battery and capacity for you.
- Estimated system size
- Estimated bill savings
- Carbon reduction estimate
- Indicative payback