13.5 kWh usable capacity
per Tesla Powerwall 3 (single unit), or up to 94.5 kWh usable capacity with all possible additional batteries and Powerwall 3 expansions
Batteries
Tesla Powerwall 3
Expandable with Tesla Powerwall 3 expansion units (up to 54 kWh)
Tesla's Flagship Solar Battery for Australian Homes
It is designed primarily for new systems or major upgrades, and can be expanded with Powerwall 3 Expansion units if you need more storage over time.
With 13.5kWh of usable storage, a built-in high-output inverter and support for up to 20 kW of solar input, Powerwall 3 combines solar, battery and backup into a compact all-in-one home battery solution ideal for new solar and battery installs in Australia.
The Tesla Powerwall 3 is the next-generation Tesla solar battery designed to store solar energy efficiently, provide powerful backup during blackouts, and give you more control over how and when you use electricity at home.
Unlike many Tesla solar batteries in the past, the Powerwall 3 inverter is fully integrated into the unit, simplifying installation and reducing the need for multiple separate devices on your wall.
Powerwall 3 Expansion
The Tesla Powerwall 3 Expansion Pack is designed for those looking to extend the duration of their backup storage at a lower cost.
13.5kWh of additional energy capacity in each unit
Install up to 3 units
Top Benefits at a Glance
While eligibility can change, most rebates apply if you:
High output inverter
with up to 11.04 kW continuous power output (model and configuration dependent)
All-in-one solar
solar + battery + inverter design for new systems
Lithium Iron Phosphate (LFP) battery chemistry
for improved safety and stability
Indoor or outdoor installation
with IP55/IP67 protection ratings
Tesla Powerwall 3 app integration
for real-time monitoring and smart control
Voice control capable
via smart home assistants (Google Home, Nest, Amazon Alexa)
Expandable storage
stack units and add Tesla Powerwall 3 expansion packs for up to 54 kWh
Backed by a 10-year Tesla Powerwall 3 warranty
with performance guarantee
Maximise your solar
Before sending your excess solar power back into the grid, Powerwall stores it for your household use at night so you use more of your solar.
Backup your home
Keeping your necessities – lights, Wi-Fi and refrigerator – running during a power outage, Powerwall offers peace of mind when needed most.
Control your energy from anywhere
Seamlessly monitor your solar and Powerwall via the Tesla App anytime, anywhere. Ensure you are efficiently using your energy, even if you're not at home and ensure you are making the most of your solar and battery investment.
Tesla Powerwall 3 App and Smart Control
Tesla Powerwall 3 App and Smart Control.
One of the major benefits of Tesla solar batteries is the software experience.
Tesla offers one of the best native energy management apps for solar batteries, which makes it easy to monitor and understand your Tesla Powerwall 3.
The Tesla app lets you:
See real-time power flows between solar, battery, home and grid
Monitor daily, weekly and monthly energy usage and savings
Choose between modes such as
- Backup-only (prioritise stored energy for outages)
- Self-powered (maximise use of your solar and battery, minimise grid use)
- Time-based control (charge from grid when cheaper tariffs apply, discharge when rates are higher, if supported by your retailer)
You can also voice control Tesla Powerwall 3
by linking it to a smart home assistant such as Google Home, Google Nest or Amazon Alexa, allowing you to check status and adjust certain settings through voice commands.
Power More of Your Home, More of the Time
The Tesla Powerwall 3 inverter is designed for serious household loads. In many configurations, it can deliver up to 11.04 kW of continuous AC power, with even higher short-term surge capability for motor start-up and power-hungry appliances.
In practical terms, this gives you flexibility to run:
Essential loads
- Fridges and freezers
- Lighting
- Wi-Fi routers and modems
- TVs, computers and devices
Medium-to-high loads
- Dishwashers and washing machines
- Microwaves, kettles and coffee machines
- Vacuums and general power outlets
Short bursts of high demand
- Pool pumps and pressure pumps
- Air conditioning start-up
- Power tools and machinery
Because Powerwall 3 can supply higher power than many competing home battery systems, it is particularly well suited to households that want to run multiple appliances at once during an outage or make heavier use of stored solar overnight.
Tesla Powerwall 3's Scalable Capacity with Expansion Packs
A single 13.5kWh Tesla Powerwall 3 provides a solid base of storage for many homes.
But if your energy needs grow, you can add:
Power Scalability
Up to 4 Powerwall 3 units in one system
Scale total backup and daily cycling capacity with multiple Powerwall 3 units, where your site and network rules allow.
Expansion Packs
Powerwall 3 Expansion units
that add extra storage capacity behind an existing Powerwall 3 for up to a total of 54 kWh of storage (4 units), through a simple plug and play configuration
It's important to understand here:
More Storage, Not More Speed
The Tesla Powerwall 3 Expansion pack increases energy storage capacity, not charging speed. Adding more expansion units gives you more kWh to use, but it does not make the system charge faster from solar or grid.
Powerwall 3 Won't Upgrade Your Powerwall 2
Tesla Powerwall 3 cannot be added to an existing Powerwall 2 system. If you already have a Powerwall 2 and want to expand storage, you must add another Powerwall 2, not a Powerwall 3.
Charging, Efficiency and Battery Chemistry
Faster Battery Charging
Powerwall 3 is designed to absorb solar energy quickly during the day and deliver it when you need it most. With DC-coupled solar input of up to 20 kW across three MPPTs, it can be paired with a sizable solar array, ideal for new Tesla Powerwall 3 and solar panels installs.
The integrated inverter and Tesla solar storage design helps minimise conversion losses:
Approximately
97.5%
Solar-to-home/grid efficiency
Approximately
89%
Solar-to-battery-to-home efficiency of typical use
Tesla Powerwall 3 Battery Chemistry
Powerwall 3 uses Lithium Iron Phosphate (LFP) battery chemistry instead of the lithium nickel manganese cobalt oxide used in Powerwall 2. This change brings:
- Improved thermal stability and safety
- Better tolerance to high temperatures
- Lower risk of thermal runaway
- A chemistry now widely adopted across the solar battery industry
Backup Power and Blackout Protection
UPS-Like Backup Performance
When paired with the Tesla Backup Gateway 2, Powerwall 3 can provide fast-acting backup power during grid outages. In a blackout, the Gateway isolates your home from the grid and Powerwall 3 continues to run the circuits configured for backup, typically within a fraction of a second.
This is an optional feature that can be activated through your Tesla Powerwall installer for additional cost.
That means key circuits such as:
- Lights and general power
- Fridges and freezers
- Communications equipment (modem, Wi-Fi, phones)
- Selected heating/cooling zones
- Key home office or medical equipment
Can stay powered while the grid is down, depending on how your electrician and Tesla Powerwall 3 installers set up your system.
Note: Tesla Powerwall 3 is designed mainly for grid-connected homes, not off-grid-only systems.
Tesla Powerwall 3 Warranty and Lifespan
Tesla offers a 10-year product warranty for Powerwall 3.
This includes guarantees about how much energy the battery can store and how well it will perform over time:
In normal daily solar use, where your solar system charges the battery during the day and your home uses that stored energy later, the Powerwall 3 is guaranteed to retain at least 70% of its original 13.5 kWh capacity after 10 years.
For standard home use, Tesla also allows unlimited charging and discharging, so you do not need to worry about wearing out the battery through everyday use.
If you use the battery more heavily, such as by joining a Virtual Power Plant (VPP) program where the battery is charged and discharged more frequently, Tesla applies a limit on the total amount of energy it can deliver over its lifetime.
Overall, the Powerwall 3 is built to support daily use for many years while still providing reliable backup power and long-term energy savings throughout its warranty period.
Tesla Powerwall 3 vs Powerwall 2 - What's New?
The Tesla Powerwall 3 is a major upgrade over the Powerwall 2, designed primarily for new solar + battery installations, with big changes in chemistry, inverter size, output and compatibility.
Safer, New Battery Chemistry
Powerwall 3
Uses LFP (Lithium Iron Phosphate) for improved battery safety and thermal stability.
Powerwall 2
Uses Lithium Ion NMC (Nickel-Manganese-Cobalt) chemistry for their battery cells. Which was previously chosen for its ability to store high amounts of energy.
Lithium iron phosphate, with its cobalt-free technology, is widely regarded as the safest choice for battery safety in the solar industry today.
This move to LFP lends Tesla's flagship battery offering in safety, durability and better suitability for outdoor installations, aligning the Powerwall 3 with the latest trends in home battery design in the market.
Bigger Inverter, More Solar Input
Powerwall 3
Features a much larger integrated hybrid inverter, able to accept up to ~20 kW of solar (with multiple MPPTs).
Powerwall 2
Has a smaller inverter and is usually installed as an AC-coupled retrofit to an existing solar system.
This means Powerwall 3 is more of an “all-in-one” solution for new systems. Able to handle bigger loads and systems within a single Powerwall, whereas Powerwall 2 is better suited to retrofitting onto existing solar.
Expansion
Powerwall systems can be expanded to increase your total storage capacity.
Powerwall 2:
You can install up to 10 units, providing up to 135 kWh of usable storage.
Powerwall 3:
You can install up to 4 Powerwall 3 batteries and 3 Expansion Units, delivering up to 94.5 kWh of usable storage.
While both systems are expandable, Powerwall 2 offers a higher maximum total storage capacity when fully expanded.
Compatibility
The Powerwall 3 cannot be added to an existing Powerwall 2 system, or vice versa.
Best Use Case
Powerwall 3
Best for new or full-upgrade solar and battery installs.
Powerwall 2
Best if you already own a Powerwall 2 and want to add more storage easily.
If you're installing a new system, the Powerwall 3's built-in inverter makes it an appealing all-in-one option. But if you're looking to add a Powerwall 3 to an existing battery and inverter setup, you may need to replace or modify your current equipment. Which isn't always the most cost-effective route.
If you want to retrofit a new Tesla Powerwall 3 to an existing solar system, it is a simple installation with an additional inverter through AC Coupling.
Tesla Powerwall 3, Technical Specifications
Battery & System Performance
Category
Specifications
Part Number
1707000-xx-y
Total Battery Energy
14 kWh AC
Usable Battery Energy
13.5 kWh AC
Battery Chemistry
Lithium Iron Phosphate (LFP)
Nominal Grid Voltage
230 V AC
Grid Type
Single phase
Frequency
50 Hz
Nominal Output Power (AC)
5 kW / 10 kW / 11.04 kW (model dependent)
Maximum Apparent Power
5,000 VA / 10,000 VA / 11,040 VA
Maximum Continuous Current
48 A
Overcurrent Protection Device
63 A
Maximum Continuous Charge Power (no expansion units)
21.7 A AC / 5 kW
Maximum Continuous Charge Power (with up to 3 expansion units)
34.8 A AC / 8 kW*
Output Power Factor
0–1 (grid code configurable)
Maximum Output Fault Current
160 A
Short-Circuit Current Rating
10 kA
Load Start Capability
185 locked rotor amps (LRA)
Solar → Battery → Home/Grid Efficiency
89% (typical use)
Solar → Home/Grid Efficiency
97.5%
Supported Islanding Device
Tesla Backup Gateway 2
Customer Interface
Tesla Mobile App
Warranty
10 years
*Higher charge power (34.8 A / 8 kW) to be enabled in a future firmware update.
Tesla Powerwall 3 Dimensions and Mounting Options
Dimensions
Approx. 1105 x 609 x 193 mm (Powerwall 3)
Weight
Approx. 130 kg
Mounting Options
Wall mount | Floor mount
Can be mounted indoors or outdoors, thanks to its IP ratings
The optional Powerwall 3 Expansion units are similar in footprint (1105 x 609 x 168 mm) and can be floor-stacked behind the main Powerwall 3 for higher capacity systems.
CEC Approved Solar Battery
The Tesla Powerwall 3 and its Expansions are CEC approved, showing it meets Australian best practice standards for safety, reliability and performance. It also means that these solar batteries are eligible for a majority of state and national solar incentives.
Some states may have their own approved product lists for state-based rebates. Remember to check with your State Government website for more information.
Can Tesla Powerwall 3 Be Installed Outside?
Yes. Powerwall 3 is designed for indoor or outdoor installation, with:
IP67
Protection for the battery and power electronics
IP55
Enclosure rating for the system as a whole
Operating temperature
An operating temperature range of -20°C to 50°C, with derating at the upper end
This makes it suitable for most Australian climates, including hot summers and cool winters, provided it is installed in line with Tesla's guidelines.
Tesla Powerwall 3 Installations from the Experts
As with any Tesla solar battery, correct design and installation are critical. A professionally installed Powerwall 3 impacts:
- Safety and wiring compliance
- How well it integrates with your existing or new solar system
- Backup performance and which circuits can be supported
- Warranty validity and long-term reliability
Solar Battery Group's Tesla Powerwall 3 installers are trained on the specific requirements of Tesla systems, including:
- Backup Gateway 2 design and installation
- Circuit selection for backup
- Integration with your switchboard, meter, and any existing solar
- Network and app setup
We manage the full process from initial assessment and system design through to installation, commissioning, and post-installation checks. You also get local Australian after-sales support, so you are not left dealing with it alone if you ever need help.
Pricing for Tesla Powerwall 3 Installations in Australia
How Much Is a Tesla Powerwall 3 in Australia?
Your total price depends on:
- Switchboard condition and upgrades
- Backup wiring complexity
- Travel and site access
- Whether you are adding expansion units or multiple Powerwalls
- Applicable federal or state rebates and VPP offers
Solar Battery Group provides detailed, itemised quotes so you can clearly see:
- Supplied hardware (Powerwall 3, Gateway, any expansion units)
- Labour and installation costs
- Any extra materials or upgrades required
- Estimated rebates where applicable
Because each home is different, the best way to know your price is to request a tailored quote.
Get FREE quoteAbout Tesla and Solar Battery Group
Tesla is one of the most recognised names in renewable energy and electric vehicles worldwide, and the Tesla Powerwall has become one of the most popular home battery systems in Australia over the past decade.
Solar Battery Group works with leading brands like Tesla to offer Australian households high-quality, tried-and-tested solar battery solutions, alongside alternatives such as AlphaESS and other modular systems. If you are comparing Tesla Powerwall 3 vs AlphaESS or other batteries, our consultants can walk you through the differences in chemistry, output, scalability and pricing so you can make an informed decision.
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View detailsFrequently asked questions
Yes. Tesla Powerwall 3 can be installed outside. It is rated for outdoor use (IP55 enclosure, IP67 for battery/electronics) and is designed to operate between –20°C and 50°C, making it suitable for most Australian climates when installed according to Tesla’s guidelines.
No. Tesla Powerwall 3 cannot be used as an add-on battery to a Tesla Powerwall 2 system. If you already have a Powerwall 2 and want more capacity, the supported path is adding another Powerwall 2, not a Powerwall 3.
Yes. You can buy Tesla Powerwall 3 in Australia as a battery-only solution in some cases, but it works best when paired with solar panels so you can charge it with your own energy. Solar Battery Group can advise whether using Powerwall 3 without solar makes sense for your situation.
Tesla warrants Powerwall 3 for 10 years, with a guarantee that at least 70% of its original 13.5kWh usable capacity remains at the end of that period (subject to usage conditions and throughput limits where applicable). In everyday use, this typically aligns with many years of daily cycling for a typical home.
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