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Tesla Powerwall 3 Installer in Teesside, County Durham & North Yorkshire
Tesla Certified Installer based in Yarm
As a Tesla Certified Installer, we have direct access to Tesla’s technical support team and reliable access to Powerwall stock. The Powerwall 3 combines 13.5kWh of battery storage, a built-in solar inverter and up to 11.04kW of continuous power in one sleek unit, with whole-home backup when paired with the Backup Gateway 2.
Quick answer
How much does a Tesla Powerwall installation cost in the UK?
A single Tesla Powerwall 3 retrofit (existing solar) costs £8,500 installed. Combined with new 4kW solar it is £14,500, with 6kW solar £17,000, or twin Powerwall + 8kW solar £23,500. All prices include Gateway 2, commissioning, DNO notification and 0% VAT. ALPS is one of a handful of Tesla Certified Installers in the North East with direct Tesla stock allocation.
Tesla Certified Installer in Teesside, County Durham & North Yorkshire
ALPS Electrical is one of a very small number of Tesla Certified Installers in the North East of England. Tesla Certified status is not easy to achieve. It requires rigorous technical training, ongoing assessment, and a proven track record of high-quality installations. Tesla only grants certification to installers who meet their exacting standards for workmanship, customer service, and technical competence.
Being Tesla Certified means we have direct access to Tesla’s technical support team, priority access to Powerwall stock, and the ability to commission systems through the Tesla Installer Portal. It also means your Powerwall warranty is fully backed by Tesla, with the assurance that the installation was completed by a trained and approved professional. We were among the first installers in the region to complete a Powerwall 3 installation, and have since fitted numerous systems across Teesside, County Durham and North Yorkshire.
Pickering, North Yorkshire: Tesla Powerwall 3 with 4.84kW solar and a 70m long cable run underground.
This was an interesting installation, where the customer wanted solar panels on his outbuilding 70 metres from his house. We needed to run a 25mm 4 core armoured cable all the way in a trench to the bottom of the garden.
Watch the video to see the full installation.
Andy and Isabella with a completed Tesla Powerwall 2 and Solar Edge inverter installation.
Thornton-le-Moor, North Yorkshire: 6.44kW solar and 27kWh Tesla Powerwall 3 storage added to an existing FIT system
This was a tricky one. The customer already had an older solar system on the Feed-in Tariff (FIT), which had to stay untouched so their FIT payments weren’t affected. But they also wanted their new batteries to store energy from both the old and new solar systems.
We installed a new 6.44kW solar system on their slate roof, a Tesla Powerwall 3 with an Expansion unit, and a myenergi Zappi EV charger. We then configured everything so both solar systems charge the batteries, while the original FIT system and its payments stay protected.
Watch the video to see the full installation.
Leo and Brad pictured two Tesla Powerwall 2s and a Solace Invertor.
Tesla Powerwall 3 Pricing in the UK
Pricing depends on whether the Powerwall is being added to an existing solar system or installed as part of a new solar and battery package and are all subject to a full site survey. Retrofit installations can be standalone AC-Coupled with no solar, or added alongside an existing solar system.
| Installation type | Installed price (inc VAT) | Includes |
|---|---|---|
| Single Powerwall 3 — retrofit (no solar change) | £8,500 | Battery, Gateway 2, commissioning, DNO notification |
| Single Powerwall 3 + new 4kW solar | £14,500 | All above + 8-10 panels, scaffolding, MCS cert |
| Single Powerwall 3 + new 6kW solar | £17,000 | All above + 12-16 panels |
| Twin Powerwall 3 (27 kWh) + new 8kW solar | £23,500 | All above + 16-20 panels, dual gateway |
| Powerwall 3 expansion battery (added later) | From £4,200 | +13.5 kWh storage, no extra inverter |
Tesla Powerwall 3: The Latest Generation
The Tesla Powerwall 3 represents a significant leap forward from its predecessor. The headline feature is the built-in solar inverter, which eliminates the need for a separate string inverter. This means fewer components on your wall, a cleaner installation, lower overall system cost, and one integrated unit managing both your solar panels and battery storage.
Key Specifications
13.5 kWh
Usable Storage
11.04 kW
Continuous Output
97.5%
Round-Trip Efficiency
3
Solar String Inputs
The increased 11.04 kW power capacity means the Powerwall 3 can comfortably handle high-demand appliances including electric cookers, heat pumps, and EV chargers. The built-in inverter supports up to 11.04 kW of solar input, making it suitable for systems of up to approximately 15 kW of panel capacity. It supports up to four solar string inputs directly, accommodating multiple roof faces and orientations without the need for additional optimisers in most cases.
Backup Gateway and Storm Watch
One of the most compelling features of the Tesla Powerwall is its ability to provide whole-home backup during grid outages. The Backup Gateway, included with every Powerwall 3 installation, automatically detects a grid failure and isolates your home from the grid within milliseconds. Your Powerwall then powers your entire home from its stored energy, and if you have solar panels, they continue generating and charging the battery even while the grid is down.
The Tesla App
Both Powerwall generations use the Tesla app, which remains the best energy management app in the consumer market. The app provides real-time energy flow visualisation showing solar generation, home consumption, battery charge level, and grid import or export. You can set your energy preferences (self-consumption, time-based control, or backup reserve), monitor historical performance, and track your energy independence percentage over time. The app also provides detailed weather data and Storm Watch notifications.
Tesla Powerwall 3 vs Powerwall 2: What Changed?
The Powerwall 2 was a groundbreaking product that established Tesla as the leading name in home battery storage. The Powerwall 3 builds on that foundation with several major improvements that make it the superior choice for new installations.
| Feature | Powerwall 2 | Powerwall 3 |
|---|---|---|
| Built-in solar inverter | No | Yes |
| Continuous output | 5kW | Up to 11.04kW |
| Storage capacity | 13.5kWh | 13.5kWh, expandable |
| Solar inputs | None (separate inverter needed) | 3 |
| Whole-home backup | Yes, limited by 5kW output | Yes, up to 11kW |
The Powerwall 2 required a separate solar inverter, adding cost, complexity, and an additional piece of equipment to your installation. The Powerwall 3 integrates the inverter directly into the battery unit, meaning fewer failure points, a simpler installation, and a single app controlling your entire solar and battery system. For new solar panel installations, this is a significant advantage.
The Powerwall 2 offered 5 kW of continuous output, which could struggle with simultaneous high-demand loads such as a cooker, kettle, and heat pump. The Powerwall 3 delivers 11.04 kW of continuous output, more than doubling the capacity. This makes whole-home backup genuinely practical.
Already have a Powerwall 2? Powerwall 3 Expansion units only work with a Powerwall 3, so they can’t be added to a Powerwall 2. If you want more storage, we can add a Powerwall 3 alongside your existing system as a standalone AC-Coupled system. Read our Powerwall 3 Expansion guide for more.
Stockton-On-tees: Two Tesla Powerwall 2s with 12.28kW of Aiko solar panels
This was a big solar installation of with 27 455w Aiko solar panels and two Powerwall 2s with full home back-up and two myenergi Zappi EV chargers.
Watch the video to see the full installation.
Tesla Powerwall Installation Process
1
Survey
We assess the optimal Powerwall location, cabling route, consumer unit capacity and meter setup. We discuss your energy goals, usage patterns and backup requirements.
2
Design & Application
System designed using Tesla’s tools. G99 application submitted to Northern Powergrid. We handle all DNO paperwork and keep you updated.
3
Installation (1-2 days)
Powerwall and Backup Gateway wall-mounted, usually in garage or on exterior wall. If adding solar panels, they connect to the Powerwall’s built-in inverter.
4
Commissioning
System commissioned via Tesla Installer Portal. Backup test performed. Tesla app set up on your phone. Full MCS documentation and warranty certificates provided.
11.04kW
Continuous output from a single Powerwall 3
More than double the Powerwall 2 — enough for whole-home backup
Frequently Asked Questions
Can I add a Tesla Powerwall 3 to my existing solar panels?
Yes. The Powerwall 3 can be added to most existing solar systems as an AC-coupled system, leaving your current panels and inverter in place.
Can I add more storage later?
Yes. Each Powerwall 3 can take up to three Expansion units, each adding 13.5kWh of storage, without adding another inverter. Expansion units only work with a Powerwall 3, not a Powerwall 2.
Will a Powerwall 3 keep my power on in a power cut?
Yes, when installed with Tesla’s Backup Gateway 2, which is included in all our Powerwall 3 prices. It automatically disconnects your home from the grid during a power cut, and your Powerwall and solar panels keep your home running.
Can a Powerwall 3 be installed outside?
Yes. The Powerwall 3 is rated IP67 and works in temperatures from −20°C to 50°C, so it is well suited to an outside wall. We will recommend the best location at your survey, in line with current battery safety standards.
Does the Powerwall 3 work with a three-phase supply?
The UK Powerwall 3 is a single-phase unit. For a three-phase home we would normally recommend one of two routes: connecting the Powerwall to a single phase, or a Sigenergy system, which supports three-phase natively. We will advise which suits your property at your survey.
Should I choose Tesla or Sigenergy?
Both are excellent, and we install both. The Powerwall 3 is simple and polished, with a first-class app and up to 11kW of power. Sigenergy offers more flexibility, with modular storage, four solar inputs and three-phase support. See our Sigenergy page for a full comparison, or ask us at your free survey.
See the Process
Why Homeowners Choose ALPS Electrical | Solar, Battery & EV Experts in the North East
Watch our
videos!
We film our installations and publish them on YouTube. We believe it offers customers a chance to see how we work and meet the team, and gives full transparency.
Why Choose ALPS Electrical For Your Tesla Powerwall?
We're a family-run business based in Yarm, with more than 500 five-star reviews across Google and Checkatrade. As a Tesla Certified Installer, we were among the first in the region to install the Powerwall 3, and you can watch our complete Powerwall installations on our YouTube channel.
Because we also install Sigenergy, Fox ESS and other leading brands, our advice is honest: we'll recommend a Powerwall when it's the right fit for your home. Every installation is carried out by our own experienced team, never subcontracted. We commission your system through the Tesla Installer Portal, test the backup, and set up the Tesla app on your phone before we leave. After that, our in-house aftercare team is always on hand and we have remote access.
Get in touch for a free, no-obligation Powerwall quote.
- Tesla Certified Powerwall Installer
- 0% VAT on home solar and battery installations until 31 March 2027
- Backup Gateway 2 included in all Powerwall 3 prices
- Owner-led survey and system design
- Northern Powergrid application handled for you
- In-house aftercare for the life of your system
- Fixed written price, with no surprise extras
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