Tesla
Powerwall 3
All-in-one solar + battery with built-in inverter. The most powerful home battery available in the UK.
13.5 kWh
Usable Capacity
0% VAT
Domestic install
10 years
Warranty
About the Tesla Powerwall 3
The Tesla Powerwall 3 is the third generation of Tesla's home battery system and a significant evolution over its predecessors. Unlike the Powerwall 2, the Powerwall 3 includes a fully integrated solar inverter — meaning it connects directly to your solar panels without requiring a separate string inverter. This simplifies installation, reduces points of failure, and saves space. With 13.5kWh of usable capacity and 11.5kW of continuous power output (30kW peak), it's the most powerful single-unit home battery system available in the UK. As Tesla Certified Installers, we are authorised to supply, install, and commission Powerwall 3 with full Tesla UK warranty support.
Key Features
Built-in Solar Inverter
Powerwall 3 replaces both your battery and string inverter in one unit, simplifying installation, reducing cost, and eliminating a potential point of failure.
Whole-Home Backup Power
Via the Tesla Gateway, Powerwall 3 backs up your entire home during a grid outage — not just essential circuits. Switchover is automatic and typically within milliseconds.
Storm Watch
Tesla's algorithm monitors weather forecasts and automatically pre-charges the Powerwall before severe weather events, ensuring maximum backup capacity when you need it most.
Time-Based Control
Automatically charge from cheap off-peak tariffs (Octopus Go, Agile) and discharge during expensive peak hours, saving hundreds annually through tariff arbitrage.
Tesla App
Monitor real-time solar generation, battery state, grid import/export, and home consumption from anywhere. Set preferences, review historical data, and control the system remotely.
Expandable to 54 kWh
Up to 4 Powerwall 3 units can be installed together for up to 54kWh capacity and 46kW continuous power — scalable as your energy needs grow.
Why Premier Electrical installs this product
The Powerwall 3's integrated inverter approach is a genuine step change in home energy systems. By eliminating the separate string inverter, we install a cleaner, more reliable system with fewer components to potentially fail. The Tesla app provides genuinely useful real-time energy monitoring, automated Storm Watch (pre-charges the battery before forecast bad weather), and seamless integration with Tesla vehicles. Its 97.5% round-trip efficiency is class-leading. For customers who want the complete package — maximum capacity, maximum power, and the Tesla ecosystem — the Powerwall 3 is the definitive choice.
Technical Specifications
| Specification | Value |
|---|---|
| Usable Capacity | 13.5 kWh |
| Continuous Power | 11.5 kW |
| Peak Power (3 sec) | 30 kW |
| Solar Input (MPPT) | 20A max per string |
| Round-trip Efficiency | 97.5% |
| Operating Temperature | −20°C to 50°C |
| Dimensions | 1,098 × 625 × 154 mm |
| Weight | 130 kg |
| IP Rating | IP67 (indoor/outdoor) |
| Warranty | 10 years / unlimited cycles |
| VAT (domestic) | 0% |
| Connectivity | WiFi, Ethernet, Cellular |
Specifications may vary by model variant. Panel selection is confirmed at survey stage based on your roof, usage, and budget.
Installed Price
From £8,500 installed
0% VAT · Tesla Certified Installation
Warranty
10 years · unlimited cycles
Registered by Premier Electrical Renewables at point of installation.
NICEIC Approved Contractor
Electrical safety assured
Tesla Certified Installer
For Powerwall & Wall Connector
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