Tesla Powerwall Installers
From £6495
Apex Doma are proud to have been awarded Tesla’s Installation Excellence Award
Powerwall 3 Rebate Now Available!
Apex Doma customers can claim up to £750 back on Powerwall 3 or Powerwall 3 Expansion units purchased 1 Dec 2025 – 31 Mar 2026 and installed 1 Dec 2025 – 31 May 2026.
Register your rebate here after purchase and again after installation.
Meet the Powerwall 3
Octopus Intelligent Tariff Compatible: Optimise your energy usage and save on costs.
Built-in Solar Inverter: Integrate up to three solar arrays into one sleek inverter with options of 3.68kW and 11.04kW, perfect for high-usage items like heat pumps.
Flood Resistant: Engineered to withstand up to 2 feet of flooding, ensuring your energy system remains protected in all conditions.
Active Thermal Management: Efficiently operates in temperatures ranging from -20 to 50 degrees Celsius.
Stormwatch: Automatically charges ahead of potential power cuts, ensuring continuous power during outages.
10-Year Warranty: Enjoy peace of mind with a decade of guaranteed performance.
Compact. Stylish. 24/7 Control
With it’s sleek and a minimalist design, Powerwall complements any home. The compact, all-in-one unit can be installed for indoor or outdoor spaces.
Manage and track your energy with instant notifications, simplified graphs and easy navigation
Prepare your system for outages and recharge with sunlight to keep your home running
Learn how your system uses energy your on a daily, weekly or monthly basis
Download our Powerwall 3 Brochure
A Standalone Solution
As your electricity rates vary throughout the day, your Powerwall will autonomously charge when electricity costs are low and discharge when electricity costs are high, generating automatic savings. If you’re in an area that suffers from power cuts, Powerwall will also seamlessly provide backup power by detecting grid outages and automatically becoming the home’s main power source.
Pair With Solar & Recharge
With solar, you can generate more energy than you need. By having Powerwall, a rechargeable home battery, you can store this excess energy for use anytime—even when the sun goes down.
Powerwall will be charged by your panels during the day, storing all that energy that isn’t being used by your home. Powerwall can then run your home during the evening or at night, using up that stored energy before taking anything from the grid. The next day when the sun starts shining, the sustainable energy cycle starts again.
OUR PURPOSE
Using our expertise to build a sustainable future. One solar panel, one battery, and one ev charger at a time.
Workmanship
Our dedication to excellence is reflected in our NICEIC Approved Contractor and Which? Trusted Trader status, alongside our MCS & RECC registrations.
Professionalism
We are not your typical tradesman. We pride ourselves on our service, which means turning up on time, tidying up after ourselves and having a dedicated office team to deliver exceptional aftercare, support, and help.
Integrity
Trust is paramount, and we pride ourselves on operating with honesty and transparency in all our pricing, communication and service delivery.
Knowledge
Our experts stay at the forefront of solar technology, ensuring we can provide the most cutting-edge solutions for our clients and help them get the most from it.
Innovation
Embracing innovation drives us to develop creative and sustainable energy solutions for a greener tomorrow.
Why choose Apex Doma?
When you choose Apex Doma, you’re choosing excellence. We’re not your run-of-the-mill tradesmen, and we’re not a big faceless corporation either. We’re a team of passionate engineers dedicated to delivering top-tier service and innovative solutions.
We’re on a mission to shatter conventional expectations of tradespeople whilst making the world a better place, one renewable energy solution at a time.
Powerwall 3 FAQ's
How much does the Tesla Powerwall cost in the UK?
The Tesla Powerwall 3 starts from £6,495 for the battery unit itself.
If your installation requires a Tesla Gateway, this adds an additional £1,000, bringing the typical installed price to around £7,495.
If you need more storage, Expansion Packs are available:
£5,500 when purchased separately
Significantly discounted when added at the same time as your Powerwall installation, allowing you to increase capacity at a much lower cost
At Apex Doma, we design every system around your home’s actual energy use. Whether you need a single Powerwall, a multi-unit setup, or backup capabilities, we make sure you only pay for the features and capacity that genuinely benefit your home.
How long does the Powerwall take to charge?
A Tesla Powerwall 3 can charge in 2–4 hours depending on the power source:
Solar power (daytime): Typically 3–6 hours depending on sunlight and system size
Off-peak tariffs (e.g., Octopus Cosy): Around 2–3 hours, depending on the charge window
With an expansion pack: Charge rate increases, reducing charge time even further
Because the Powerwall 3 has an 11.04 kW inverter and a 5 kW charging rate per unit (8 kW when paired with an expansion pack), it is one of the fastest-charging home batteries available in the UK.
Can a Powerwall power my home during a power cut?
Yes — the Tesla Powerwall 3 can power your home instantly during a power cut with 0-second changeover.
You won’t even notice the grid has dropped.
Depending on how your system is configured, a Powerwall can run:
- Lights
- Sockets
- Heating controls
- Appliances
- WiFi
- Security systems
- Electric gates
- Essential loads or even your entire home if sized correctly
If you need whole-home backup or want protection for sensitive equipment, we design a system that keeps everything running safely and smoothly.
How many Powerwalls do I need?
Most homes in the UK need 1–2 Powerwalls, depending on:
- Your daily energy usage
- Whether you heat with a heat pump
- If you want full-home backup or just essential circuits
- How much you want to charge during off-peak tariffs
- Whether you have EV charging
- Your long-term energy goals
Typical recommendations:
- 1 Powerwall (13.5 kWh): Small/medium homes, no heat pump
- 1 Powerwall + Expansion Pack (27 kWh): Medium homes with heat pumps, families with high usage
- 2 Powerwalls: Large homes, high energy usage, full-home backup
- 2 Powerwalls + Expansion Packs: Rural homes with long outages or large heat pump systems
During your design call, we calculate this using your smart meter data, seasonal demand, and tariff strategy to size the system correctly — not too big, not too small.
Proud to be Trusted by
We take pride in being a certified solar panel installation company, ensuring the highest standards
of quality and expertise for our valued customers.
