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The Tesla Powerwall 3 is the most advanced home battery system available in the UK. Launched in June 2024, it stores solar energy or cheap overnight grid electricity and delivers it when you need it — slashing bills, powering your home during outages, and maximising your solar investment.
Unlike its predecessor, Powerwall 3 has a fully integrated solar inverter built in — no separate inverter required. This cuts hardware, speeds installation, and delivers 5–6% better efficiency over AC-coupled systems.
Not just an upgrade — a fundamentally different system that changes what a home battery can do.
No separate inverter required. Solar connects directly to the battery — reducing hardware, cutting installation cost and improving efficiency by 5–6% over AC-coupled systems.
No Separate Inverter
More than double Powerwall 2. Runs a home's full load simultaneously — EV charging, heat pump, electric hob and washing machine — without breaking a sweat.
2× Power of PW2
Three independent MPPTs allow panels on south, east and west roof aspects to be optimised independently — perfect for the UK's varied roof configurations.
20kW DC Solar Input
For every 100kWh stored, 97.5kWh is delivered. Industry-leading performance that maximises financial return from every unit of solar generated.
Best-in-Class
Connected to Met Office weather data, Powerwall 3 pre-charges to 100% when severe weather is forecast — maximum backup before a potential grid outage.
Automatic Weather Response
Add DC expansion packs of 13.5kWh each — up to 3 per unit, up to 4 units on single phase. Scale up any time to 216kWh without replacing the core unit.
Up to 216kWhWe know what you might be wondering: if Evergreen isn't a Tesla-certified installer, why talk to us? The answer is straightforward — and it matters for your project.
We are fully accredited Tesla Energy Product Installer — you benefit from our years of expertise along with industry leading certifications.
Seamless Project Management
We've designed and delivered battery storage systems long before it was mainstream. Our engineers understand how batteries, solar, inverters and grid connections integrate — better than most.
Decade of Battery Experience
We assess your solar output, consumption and EV charging needs to specify the right Powerwall 3 configuration — single unit, Gateway setup, or fully scaled with expansion packs.
Free System Design
As specialists in solar PV, heat pumps and EV charging too, we ensure your Powerwall 3 works as part of a whole-home energy ecosystem — not just a box on the wall.
Whole-Home Approach
Our accreditations provide the consumer protections, quality standards and electrical compliance required for a Powerwall 3 installation to be completed correctly and safely.
MCS · NAPIT · HIES · TrustmarkFrom first enquiry to fully commissioned system — here's what working with Evergreen Power UK looks like.
Talk to our specialists about your energy goals, solar setup and Powerwall 3 options. No obligation, no pressure.
We visit your property, assess your electrical setup and design the right Powerwall 3 configuration for your specific home.
Expert installation by accredited engineers or via our Tesla-certified partners. Full G99 grid application and Tesla App setup.
Full Tesla App walkthrough, tariff optimisation advice and ongoing support. Annual servicing to protect your warranty.
Full technical data for the UK — from the official Tesla UK datasheet.
Start with what you need today. Scale up as your requirements grow — without replacing the core unit.
The standard system — 13.5kWh with built-in hybrid inverter. Ideal for most UK homes with solar. Covers an average household for approximately one full day.
Add 1–3 DC expansion packs (13.5kWh each) to your Powerwall 3. Cheaper and simpler than a second unit — no additional inverter required.
Up to 4 Powerwall 3 units on single phase, each with 3 expansion packs. Total 216kWh — enough for genuine whole-home energy independence.
Battery storage installed in a domestic property currently qualifies for 0% VAT in the UK — rather than the standard 20%. This applies with or without solar panels, and is confirmed until 31 March 2027.
On a Powerwall 3 costing approximately £7,000–£8,500 installed, the 0% VAT saving alone can be £1,400–£1,700. Evergreen Power UK applies this automatically on every qualifying quote.
Over 1,500 five-star reviews across all our renewable energy installations.
"Evergreen guided us through the whole Powerwall 3 project from system design to handover. Their knowledge of how it integrates with our solar and EV charger was genuinely impressive. Brilliant from start to finish."
"We'd had solar for three years and wanted battery storage. Evergreen specified the right system, handled all the paperwork and made sure Powerwall 3 integrated perfectly with our existing setup. The 0% VAT saved over £1,200."
"The Tesla App is brilliant — you can see exactly what's happening with your energy in real time. Our bills have dropped significantly and we've had backup power through two grid outages since installation."
Everything UK homeowners ask before booking a free survey.
No. Powerwall 3 can charge from cheap off-peak grid tariffs without solar. However, the biggest returns come when paired with solar PV.
Yes. Battery storage for domestic UK properties qualifies for 0% VAT — with or without solar. Confirmed until 31 March 2027. Evergreen applies this automatically.
Yes, when configured with the Backup Gateway 2. The Gateway detects outages and automatically isolates your home, allowing Powerwall 3 to power your property seamlessly.
Tesla provides a 10-year warranty guaranteeing at least 70% capacity retention and unlimited charge/discharge cycles. Reliable internet must be maintained for the full warranty.
Yes. Powerwall 3 supports AC-coupled retrofit to existing solar with third-party inverters. DC-coupling gives better efficiency for new solar installs. We'll advise at survey.
Most households with 4kW solar save £600–£1,200 per year after adding Powerwall 3. On smart tariffs like Octopus Agile, savings can be considerably higher.
Talk to Evergreen Power UK's battery storage specialists. We'll design the right Powerwall 3 system for your home, manage the project end-to-end, and maximise your investment.
