Tesla Powerwall 3 Installation
Tesla Powerwall 3 represents the latest evolution in home battery storage technology, combining industry-leading power output with exceptional value and flexibility.
Naked Solar have been improving solar for everyone since 2010. Providing impartial advice and insights to promote more durable, safer and effective installs means it’s no surprise that Tesla awarded Naked Solar Tesla Premium Installer status.
Leading Tesla Premium Certified Installer In The South West
Tesla Powerwall 3 is an advanced home battery system that stores energy from solar panels or the grid, allowing you to use that energy when you need it most.
Unlike traditional home energy systems that rely entirely on the grid, the Powerwall 3 gives you control over your energy supply, reducing your electricity bills and providing backup power during powercuts.
Tesla Powerwall 3 Key Capabilities:
- Energy Storage – 13.5kWh of useable capacity per unit
- Power Output – Industry-leading 11kW continuous power
- Integrated Solar Inverter – Simplifies installation and reduces cost
- Intelligent Energy Management – Automatically optimises your energy usage
- Backup power – Seamless transition during power cuts
- Expandable – Add up to 3 expansion packs for 54kWh capacity
The Powerwall 3 is designed for homeowners with solar panels who want to maximise their solar investment, reduce reliance on the grid, and protect against rising energy costs.
It’s equally suitable for those without solar looking to benefit from time-of-use tariffs and Solar Grid Trading opportunities.
Why Customers Choose Tesla Powerwall 3
- Unrivalled Power – Industry leading output power (11kW) handles high-load household items, like EV Chargers, Heat Pumps and Electric Showers with ease.
- Best Value – Maximise your Solar Energy to deliver huge carbon reduction and finanical benefits, lowest price per kWh any battery.
- Exceptional Flexibility – Easy to add Powerwall Expansion packs and simple integration with existing solar systems. Install indoors or outdoors.
- Market Leading Features – Includes whole home powercut cover, 10 year warranty, Powerwall app with monitoring and AI forecasting.
Why Choose Naked Solar for your Tesla Powerwall 3 Installation?
Naked Solar are proud to be in the top 3% of UK Powerwall Installers. Rewarded with the coveted “Tesla Powerwall Premium Certified Installer” status, a symbol of trust from Tesla based on installation quality checks and customer feedback.
- Expertise – Naked Solar have been installing Solar since 2010, delivering energy independence across the South West, including hundreds of Powerwall Installations.
- In-House Team – All installations carried out by our expert team, ensuring safe, reliable and durable installations.
- Multi-Award Winners – Since 2011, Naked Solar have received industry recognition through dozens of Reigonal and National awards.
- Aftercare – Problems are few and far between, even so, our dedicated support team are on hand to sort problems out quickly or advise on getting the most from your Solar life.
Recent Tesla Powerwall 3 Installations by Naked Solar
We’ve been busy delivering energy independence across the South West since 2010 – Check out some of the latest Tesla Powerwall 3 Installations from our team.
We’re here to give you all the information, allowing you to make an informed decision on your Solar system
What Customers Say About Naked Solar’s Tesla Powerwall 3 Installations
| Tesla Powerwall 3 Technical Specifications
|
|
|---|---|
| Storage Capacity | 13.5 kW |
| DC Expansion Packs | 13.5kWh (up to 3 per Powerwall) |
| Output Power | 3.68 kW – 11 kW |
| Dimensions | Height 1096 x Width 609 x Depth 193 (mm) |
| Built-In Solar Inverter | Yes |
| AC/DC Coupled | DC or AC |
| Powercut Cover | Yes |
| Storm Watch | Yes |
| Warranty | 10 Years |
Storage Capacity
Powerwall 3 boasts a useable capacity of 13.5kWh. Tesla’s analysis of over 600,000 Powerwall installations, found 13.5kWh to be the optimum capacity to provide a day’s backup for the majority of homes.
What does 13.5kWh actually power?
- Average UK household daily consumption: 8-20 kWh
- Full home for 24+ hours (typical useage)
- 40-50 miles of EV Charging
- Heat pump running for 12-18 hours
Adding capacity with DC Expansion Packs
The Telsa Powerwall 3 DC Expansion Pack adds 13.5kWh of energy storage capacity to the Powerwall 3 system, meaning anyone can increase capacity with no need for National Grid approval.
- Increase charging power from 5kW to 8kW.
- Up to 3 units can be added to each Powerwall.
- Double your powercut cover.
- Increase your bill savings and Solar Grid Trading opportunity.
Output Power
The “Power Everything” strapline is no joke. Powerwall 3’s market leading output power of 11kW allows high-load household items like EV Chargers, Heat Pumps, Electric Showers and Hot Tubs to be powered solely by a single Powerwall 3 without needing extra power from the grid.
Powerwall 3 partners unrivalled power with intelligent flexibility by allowing installers to maximise your grid connection using the configurable power output settings between 3.68kW to 11kW.
Why 11kW matters:
- Electric vehicle charging: Charge your EV at full speed for stored Solar
- Heat Pumps: Run efficiently without grid support (typical heat pump draw 2-4 Kw)
- Electric showers: No interruptions during power cuts (typical draw: 8-10kW)
- Multiple appliances: Run several high-power items simultaneously
- Future-proofing: Ready for increased electrification of homes
Dimensions & Aesthetics
Tesla Powerwall 3 Dimensions:-
- Height: 1096mm (109.6 cm)
- Width: 609mm (60.9cm)
- Depth: 193mm (19.3cm)
- Weight: 130kg
The Powerwall 3’s compact and functional design includes a narrower unit than Powerwall 2, allowing easy and convenient installation without intruding into your room space too much.
Where can Tesla Powerwall 3 be installed?
- Indoors: Garage, utility room, plant room (most common and efficient)
- Outdoors: Weather-resistant (IP67 rated) but less efficient in cold weather
- Wall Mounted: Requiries stuitable wall strucutre (can mount on stud walls with appropriate fixings
- Not Suitable: Under stairs or escape routes (PAS 63100 safety standard)
The Powerwall 3 has also been given a fresh look whilst still nailing the clean, futuristic brief that’s become synonymous with Tesla.
Built-In Solar Inverter
Perhaps the most groundbreaking addition to the Powerwall 3 is the integrated Solar Inverter (hybrid inverter) with 3 separate Solar inputs (MPPT’s).
What is a solar inverter and why does it matter?
A solar inverter converts the DC (direct current) electricity from your solar panels into AC (alternating current) electricity that your home uses. Traditionally, this required a separate inverter costing £800-£1,500 to install. The Powerwall 3 combines this functionality, delivering multiple benefits.
Now that Solar and Battery share the same inverter more options are opened up with valuable benefits to Powerwall 3 owners:-
- Just add panels – Choosing your Solar PV system has never been simpler. Just select your preferred Solar Panels to add to your Powerwall 3 and you’re ready to join the Solar revolution!
- Neater look – Housing the Solar inverter in the battery delivers on a much neater set up and minimises installation labour, an added bonus for homeowners.
- Efficiency gains – Powerwall 3’s DC-Coupled system means more useable energy for your home, Tesla’s research shows over 97% efficiency even with small Solar PV arrays.
- Reduced price – Uniting Powerwall 3’s Solar & Battery inverter can shave between £400 – £1000 off of your Solar PV system’s total price.
This means you can have:
- Solar Panels on 3 different roof aspects
- Different tilt angles optimised for each roof sections
- Panels on multiple buidlings (house and garage, for example)
Complex roof? No problem!
The 3 Maximum Power Point Trackers (MPPTs) in Powerwall 3 support installations on up to 3 different pitches and orientations. Especially important for tackling those tricky roofs with multiple aspects and shading considerations.
Installation Flexibility: Maximise your Solar Opportunity
Powerwall 3’s 11kW inverter can handle up to 20kWp of Solar Power, almost double the inverter size. This “oversizing” is intentional and beneficial.
Why install more solar than your inverter rating?
- Maximises generation during all seasons
- Compensates for less-than-ideal roof orientations
- Ensures strong performance on cloudy days
- Extends productive hours (earlier morning, later evening generation)
- Typical recommendation: 14-18kWp of panels on 11kW inverter
Having the largest Solar PV array possible connected to your Powerwall 3 gives you the best opportunity to harvest the most energy, maximising your independence from the grid and offering the highest returns on Solar Grid Trading tariffs, making your home a real power house.
Can I add a Powerwall 3 to my existing Solar PV system?
Yes! The Powerwall 3 is suitable for retrofitting to an existing Solar PV system and you can also add to your Solar array by connecting more panels in to your Powerwall 3. All this can be added without affecting any Feed In Tariff payments you may receive.
Retrofit options:
- AC-coupled: Keep your existing solar inverter, Powerwall monitors grid import/export
- DC-coupled: Remove old inverter, connect panels directly to Powerwall 3 (requires compatible panels)
- Hybrid: Keep some panels on existing inverter, add new panels to Powerwall 3
Our technical team will assess your existing system and help you choose the best approach for your specific installation.
Worried about Powercuts?
An ever-popular feature of the Tesla Powerwall – Home Backup, is available with the Tesla Powerwall 3, allowing you to use your stored energy to power your home during a powercut.
Powerwall technology is already responsible for preventing a whopping 33 million power losses globally by seamless transitions to backup.
How Powerwall 3 handles power cuts:
- Detection: Senses grid loss within 100 milliseconds
- Switchover: Seamlessly transitions to battery power
- Island mode: Isolates your home from the grid
- Reconnection: Automatically reconnects when grid power returns
Backup configuration options:
- Whole home backup: All circuits protected (up to 11kW)
- Essential loads only: Prioritise critical appliances for longer backup duration
- Customisable: Choose which circuits to protect through the Tesla app
Storm Watch
Among the impressive array of features offered to Powerwall 3 owners is ‘Storm Watch’, intelligent weather monitoring feature that anticipates severe weather conditions and charges to maximum capacity.
How Storm Watch works:
- Monitors weather forecasts in your area
- Activates automatically when severe weather approaches
- Overrides normal charging modes to reach 100% capacity
- Ensures you’re fully charged before potential power cuts
- No user intervention required
Another huge tick in the box of independence from the grid, ensuring your ready to go in alone in the case of possible outages caused by adverse weather.
Warranty & Long Term Reliability
In keeping with the Powerwall 2, the Powerwall 3 matches it’s 10 year warranty.
What’s covered:
- Battery capacity degradation (guaranteed 80% capacity after 10 years)
- Manufacturing defects
- Component failures
- Software issues
Warranty terms:
- Unlimited cycles: No limit on charge/discharge cycles
- Warranty capacity: Guaranteed 80% of original 13.5kWh capacity (10.8kWh minimum)
- Labour coverage: Tesla covers replacement labour costs
- Transferable: Warranty transfers to new homeowners
Tesla’s support experience:
Our experience of dealing with Tesla’s support has been excellent. Tesla shows a great attitude to customer care by quickly rectifying issues and, if necessary, sending out products quickly and covering all labour costs to ensure customers are back up and running as soon as possible.
Expected lifespan:
While warrantied for 10 years, Powerwall systems are designed to last significantly longer. Based on Tesla’s battery technology track record in electric vehicles
Tesla Powerwall 3 - Frequently Asked Questions
- Is Powerwall 3 compatible with my existing Solar PV inverter?
Yes! In the same way that Powerwall 2 works independently of your existing Solar PV system by simply monitoring when there is electric being exported to the grid, Powerwall can do the same. It will see electric being exported to the grid and charge at the same rate. When you have demand from the grid, Powerwall 3 will respond by discharging to meet your demand.
What’s better about Powerwall 3 is it will cover much higher loads up to 11kW (with Grid permission… don’t worry we do the paperwork) which is plenty for 99% of households and many small businesses.And don’t worry if you have Feed In Tariff, it’s unaffected and Naked Solar can help navigate the process for you.
- Does Powerwall 3 work indoors or outdoors?
The good news is both! Powerwall 3 is safe in the rain thanks to it’s IP67 rating. The innovative cell level heating system keeps the battery warm, allowing operation from -20°C up to 50°C.
Beware of outdoor installations: Studies show the most efficient temperature for Lithium Iron Phosphate batteries is highest at room temperature. For outdoor installations, bear in mind you might loose a handful of units (kWh) each year to keep the battery warm enough to perform well when the outside temperature drops below freezing.
- Can Powerwall 3 be installed under the stairs?
Under the PAS 63100, Battery Energy Storage Systems should not be installed under stairs or in an area that would be considered an escape route in the event of a fire. This is because of the concern that a battery could catch fire during a house fire.
- Can Powerwall 3 be installed on a stud wall?
Yes, Powerwall 3 can be installed on a stud wall, our engineers will decide on the most appropriate fixings to use depending on the structure of your stud wall.
- What are the Tesla Powerwall 3 dimensions?
The Powerwall 3 is 1096mm high by 609mm wide and 193mm deep. It weighs in at 130kg which is why Tesla designed a ‘Dolly’ to enable safe movement of the unit.
- What happens if Powerwall 3 develops a fault?
Your first port of call is Naked Solar, our technical team have years of experience in diagnosing a wide variety of faults with Solar PV & Battery Storage systems. Tesla also have a technical team should the fault need deeper diagnosis. Naked Solar have experience of working with the Tesla Powerwall team so will be able to help, even if Naked Solar didn’t carry out your installation.
- Can I add Powerwall 3 to my Powerwall 2 installation?
Unfortunatley not. To expand your existing Powerwall 2 installation you can add another Powerwall 2. You’ll need permission from your DNO who look after your local electric supply network. Naked Solar can take care of this application for you and Powerwall 2 is still available.
Rumour control is saying that Powerwall 3 may be able to work with existing Powerwall 2 installations in the future, however this has not been confirmed by Tesla.
- What are the main differences between Powerwall 2 and Powerwall 3?
The big news is the power output increasing from 5kW to 11kW, meaning Powerwall 3 can power devices like EV chargers, Electric Showers and Heat Pumps. The addition of a Solar Inverter also reduces installation costs when compared to Powerwall 2 while also reducing the conversion losses in the system. For a full review of the differences, take a look at our Powerwall 2 v Powerwall 3 blog post.
- How many Powerwall 3s will I need?
That depends on a lot of factors, whilst 1 x Powerwall 3 will store enough electric to run the average house for more than a day, many customers want more storage to help reduce their reliance on the grid or to maximise their Solar Grid Trading. The beauty of Powerwall 3 is that you can add more storage at a later date if you want to dip your toe in to start with. Our expert team of consultants will be able to talk through your specific situation and help you make a fully informed choice.
- Does Tesla Powerwall need internet?
Powerwall 3 requires an internet connection in order to commission the system. Tesla recommend installers set up both hard wired and wireless connections where possible to give the best chance of a good connection for monitoring, controlling and free software updates.
If Powerwall is not connected to the internet, it will continue to operate in the last operating mode set and provide backup power during an outage, but it will not provide remote monitoring via the Tesla app. Extended periods without an active internet connection will prevent software updates and may impact the product warranty.
- Is Powerwall 3 available in different colours?
The Powerwall 3 is only available with the Glossy Glass White finish. Tesla have given no indication that they intend to offer different coloured options. We know some people like to bling their things so we’re sure that some owners will add a laminate wrap and we’re looking forward to seeing the results of Powerwall 3 owners creativity.
- Can I have Tesla Powerwall without solar?
Yes, Powerwall 3 can be installed so that you can benefit from Solar Grid Trading, so you can dip your toe and add solar later if you wish. This is also a good option for those who live in flats.
- How much noise does Powerwall 3 make?
At times of heavy use, the Powerwall 3’s fans will operate to keep the cells in tip top condition. These fans will generate a similar noise to a large PC fan.
