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Tesla Powerwall

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Tesla Powerwall Home Battery

The next evolution in home energy storage is here! The second generation of Tesla Powerwall (still referred to as Tesla Powerwall or just Powerwall) is Tesla’s newest home solar battery.  Installs have already begun!

What makes this solar battery so significant? Tesla Powerwall 2 has an incredible 13.5kWh of battery storage, double that of its predecessor, in a smaller unit!

The solar battery stores your excess solar power and/or cheap off peak power from the grid to allow you to supply your home with cheap, environmentally friendly power during the night and early hours of the morning.  In other words, it’s purely designed to save you money.

Tesla Powerwall is a battery primarily designed to store power generated from solar panels. When it’s needed it will feed the stored energy into your home, so it’s perfect for night-time, power blackouts or even when it’s cloudy and your solar system is not performing to maximum capacity.

Tesla Powerwall supports:

  • Maximised solar self-consumption – Utilise your solar generation to its fullest to reduce your bills significantly. Only export power to the grid when home loads are covered and the battery is fully charged for night time use.  Use solar generated power all day and all night!
  • Time of use load shifting – Use your power at night to save even more money!
  • Back-up power functionality – Blackouts and brownouts, are a thing of the past.  Never be without power!
  • Employment in ‘Off-Grid’ Solutions – Perfect battery for use in solar single phase off-grid solutions!

In the event of a blackout, Powerwall will feed the power stored in the battery back into the home until it’s depleted.  When paired with an appropriately sized solar system, there should be enough charge in the battery to get you through the blackout until the morning.  No more food going to waste as the refrigerator stays on!

For those who get semi-frequent brownouts, with the addition of the Tesla Powerwall Backup Gateway, your solar system will still operate during a brownout, providing power to the home loads first, then storing any excess in the solar battery with any shortfalls in power required by the home not being generated by the solar system being covered by the battery itself!

Boasting a generous 10 year warranty, Tesla Powerwall home battery has been designed and the warranty set out for the battery to be cycled daily (the process of charging and discharging) and with its generous 13.5kWh of battery storage has enough energy storage capacity to power a typical family home* with a little left over. Homeowners can virtually go off-grid, paying mere peanuts to their energy retailers for the little power, if any, which might be required. With a single Powerwall, you could power a typical two bedroom home for the entire day*, free from grid power, utilising your own environmentally friendly power.

Tesla solar battery is available as an AC-coupled unit with its own battery inverter.

What this means for homes without solar – You don’t need to purchase an expensive hybrid solar and battery inverter. You are able to choose any inverter you like. Power optimisers, micro inverters or standard inverters (we sell them all too!).

What this means for homes with existing solar – You don’t need to throw out your existing inverter and have it replaced to take advantage Tesla Powerwall. Even better, you can add additional solar at any time and this will still be able to flow into Tesla Powerwall before any energy is exported to the grid.

It’s also sleek, compact and stackable (up to 10 units), can be floor or wall mounted, indoors or outdoors. Finally, it can be added to an existing solar system as a ‘retrofit’ unit or as part of a brand new solar system and battery combination; ask us today about ordering yours or get a quote in 60 seconds!

*Based on data from the Australian Bureau of statistics, 2014. Avg National household uses 5,817kWh per year. Using trend of energy use reduction of 12.5% per year, average daily use in 2016 is 12kWh per day.

Introducing Powerwall 2 - The 14kWh battery by Tesla Energy announced on 28th October in Los Angeles

The Tesla Powerwall, the 13.5kWh home solar battery by Tesla.

Tesla Powerwall Specs

  • Usable Capacity: 13.5 kWhpowerwall-2-dimensions
  • Depth of Discharge: 100%
  • Efficiency: 90% round-trip
  • Power: 7kW peak / 5kW continuous
  • Supported Applications: Solar self-consumption, Time of use load shifting, Backup, Off grid
  • Warranty: 10 years
  • Scalable: Up to 10 Powerwalls
  • Operating Temperature: -4° to 122°F / -20°C to 50°C
  • Dimensions: L x W x D: 44″ x 29″ x 5.5″(1150mm x 755mm x 155mm)
  • Weight: 275 lb / 125 kg
  • Installation: Floor or wall mounted, Indoor or outdoor
  • Certification: UL and IEC certified, Grid code compliant
  • Compatibility: Single phase and three phase power supply compatible.

The second generation of Tesla Powerwall is the most affordable home battery in terms of cost per kWh. Powerwall economically meets the daily needs of the average family household.

It has a long life due to its liquid thermal control system regulating Powerwall’s internal temperature to maximise battery performance in even the harshest Australian climates.

To top it off, it also has in integrated internal inverter to convert DC energy to AC energy which is what your household runs on, which lowers the cost of installation and complexity of installation.


Why choose the Tesla Powerwall?

  • It is weather-proof (can be installed inside or outside)
  • It takes up less space than other home battery systems
  • It requires no maintenance

Why choose Natural Solar for your solar and battery storage needs?

    • We install Australia-wide!
    • Rated #1 Solar and Battery Installer out of 3789 competitors on
    • We are a Tesla Powerwall Certified Installer.

What makes Tesla Powerwall the ideal battery storage for your Australian home?

Australia has one of the highest electricity prices in the world, and it’s increasing at a steady pace too. We have an abundance of sunshine too, which makes Tesla Powerwall a no brainer for both homes and small businesses.

Powerwall 2 is built with Australia in mind to combat this. It meets and exceeds all safety requirements for Australian lithium-ion solar power batteries, meaning it can be installed anywhere across Australia.

The 13.5kWh solar battery is specifically designed with the average Australian household or small business in mind, with the specific intended use and the ideal chemical lithium-ion composition for the battery to be charged and discharged (cycled) on a daily basis.


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Tesla Powerwall Technical Specs

Performance Specifications:

AC Voltage (Nominal): 208 V, 220 V, 203 V, 277 V, 100/200V, 120/240V.
Feed-In Type: Single & Split-Phase
Grid Frequency: 50 and 60 Hz
AC Energy*: 13.5kWh
Real Power, max continuous²: 5.8 kVA (charge and discharge)
Real Power, peak (10s)²: 7.2 kVA (discharge only)
Imbalance for Single-Phase Loads: 100%
Power Factor Output Range: +/- 1.0 adjustable
Power Factor (full-rated power): +/- 0.85
Depth of Discharge: 100%
Internal Battery DC Voltage: 50 V
Round Trip Efficiency *³: 89.0%
Warranty: 10 years

*Values provided for 25 degrees celsius, 3.3 kW charge/discharge power.
²Values region-dependent.
³AC to battery to AC, at beginning of life.

Energy Gateway Specifications:

User Interface: Tesla App
Connectivity: Wi-Fi, Ethernet, 3G
AC Meter: Revenue grade
Operating Modes: Support for wide range of usage scenarios
Backup Operation: Optional automatic disconnect switch
Modularity: Supports up to 9 AC-coupled Powerwalls

Environmental Specifications

Operating Temperature: -20°C to 50°C
Storage Temperature: -30°C to 60°C
Operating Humidity (RH) Up to 100%, condensing
Maximum Altitude: 3000m
Environment: Indoor and outdoor rated
Enclosure Type: NEMA 3R
Ingress Rating: IP67 (Battery & Power Electronics)
IP56 (Wiring)
Noise Level @ 1m:

Mechanical Specifications

Dimensions: 1150 mm x 755 mm x 155 mm
Weight: 122 kg
Mounting options: Floor or wall mount

Compliance Information

Safety: UL 1642, UL 1741, UL 1973, UL 9540, UN 38.3, IEC 62109-1, IEC 62619, CSA C22.2.107.1
Grid Standards: Worldwide Compatibility
Emissions: FCC Part 15 Class B, ICES 003, EN 61000 Class B
Environmental: RoHS Directive 2011/65/EU, WEEE Directive 2012/19/EU, 2006/66/EC
Seismic: AC156, IEEE 693-2005 (high)

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Tesla Powerwall FAQs

Most Commonly Asked Questions

I don’t have solar OR I want to add more solar: When adding a new solar power system to your home, Natural Solar will install the solar panels, solar inverter and the the Tesla battery and optional backup circuitry at the same time.

If you already have solar and don’t want to add additional solar panels: You can add a Tesla battery to an existing solar power system with no issues, provided you have at least 3kWp of solar panels and have around 13-15kWh of excess solar per day that would normally be exported to the grid for 6c/kWh would instead be pushed into the battery and used at night, preventing you from buying back that same power you would’ve exported at 6c/kWh at 4-6x the price (~$0.48/kWh on time of use peak tariffs).
Note: Solar panels are very cheap now due to government rebates (STCs) and reduced costs of creation so it’s common place for Natural Solar’s installation team to organise the removal and disposal of your existing system to be replaced with a much higher power output solar array, or add a completely separate solar array to another face of your home. We would either install Q-Cell 280w Panels or SunPower 327w Panels.

Natural Solar is able to provide and install all the parts you need to get up and running – Tesla Powerwall, an appropriate solar inverter for your property and Tier 1 rated solar panels (link – why is this important).

If you’re interested in getting an instant quote, please click here to fill out our Tesla Powerwall Quote form.

As an AC Coupled battery, you do not need a Hybrid inverter, just a standard solar inverter is sufficient.  When compared to it’s predecessor, expensive hybrid technology was one of the items hindering a good ROI. With Tesla Powerwall 2, you can use this with any solar inverter, so you don’t need to fork out the extra $1500+ for a hybrid inverter!

At Natural Solar, we near refuse to work with solar inverters other than Fronius and SolarEdge inverters. The reason for this is that their warranties are solid, their customer service for completing any warranty claims and replacements has been consistently industry-leading and they’re the top end, high quality, brilliantly engineered and have the highest efficiencies of solar inverters on the market and they last.

Fronius solar inverters are perfect for typical house roofs which have 4 slopes on them. With their Dual MPPT Trackers, we can put a sizeable solar array on both your north and East or West roof without hassle. Suitable for both single phase and three phase properties.

SolarEdge solar inverters and their DC Power Optimisers (think Micro Inverters but the power conversion is done at a central inverter and cheaper) are ideal for roofs with many different faces on the roof. So even if you could only fit 2-6 panels on one roof face, that roof face is still able to be utilised to its fullest by having the solar panels installed with SolarEdge DC Power Optimisers connected to each one, allowing each panel to perform at its individual peak performance without shade at certain times of the day impacting the entire array/subarray. Read more about why we recommend SolarEdge for complex roofs.

Natural Solar is able to provide and install all the parts you need to get up and running – Tesla Powerwall 2, a compatible and appropriate inverter for your property and solar panels (if you already have some and have more space, these are still really cheap due to government rebates in Australia!).

If you’re interested in getting an instant quote, please click here to fill out our Tesla Powerwall Quote form.

After currency conversion, shipping costs from America to Australia, Australian import tax, warehouse storage costs, freight to the property, as well as the labor of installation and the required inverter and panels, it’s highly unlikely the cost is going to decrease anytime soon.

We are already offering Tesla’s battery at the lowest costs we can find around Australia.

Additionally, we have intensely negotiated with several financial institutions and have been able to secure industry-lowest finance rates of 6.12% paid monthly over 1 to 5 years or 7.98% paid monthly over 1 to 7 years. Depending on your home loan provider, you may also be able to refinance your home loan to cover this cost!

Find out how much you can get a new Tesla Battery and solar system for by filling out instant online quote form here.

Natural Solar’s owner and director Chris Williams has been in the Solar Industry since 2008 and Natural Solar has been proudly providing solar solutions to customers Australia-wide since 2012.

We have offices in NSW, VIC, QLD, SA and install and service Australia-wide!

We’ve worked on some huge projects here in Australia for big clients such as Sydney Trains (NSW Transport System) and The Australian Museum as well as numerous other commercial installations like Ainsworth Gaming Tech, Capital Coast Kitchens and the Canterbury Ice Rink as well as pubs, clubs and RSLs such as Wangi District Workers Club and the Muswellbrook District Workers Club.

Check out some of our residential installations here.

Check out some of our commercial installations here.

You sure can! You can add Tesla Powerwall as the off grid rechargeable battery pack for your home. With its 13.5kWh of battery storage, it’s the perfect fit for many single phase off grid homes. They’re stackable too, up to 10, so you can ensure that you will never be without power. More information here.

If your property is currently connected to the grid, keep it connected is the general consensus as there may be charges to reconnect back to the grid.

For the battery, no. For solar panels, yes.

Prices quoted by our team and our instant online quoting system are after government rebates are accounted for.

It does not require regular maintenance, unlike many other solar batteries on the market, the battery once installed does not require any monitoring or maintenance by the owner.

If any servicing or troubleshooting is required, Natural Solar will provide this service.

Included is a 10 year limited warranty.

The limited warranty covers defects in parts and workmanship, as well as at least 60% energy retention after 10 years, provided it is registered, connected to the internet so that it can receive software updates from Tesla and used as intended.

At the end of the warranty period, the battery will retain at least 60% of its initial energy capacity. The duration of time it will keep working past the end of the warranty period depends on a number of factors including type of operation and environmental conditions.

Yes we do! We’ve secured industry lowest rates of 6.12% over up to 5 years and 7.99% over up to 7 years! Check out our Finance page for more information here.

The dimensions of the battery are shown below and weighs 125kg.


Inverter / Additional Hardware

Yes, the system can island to support backup loads, but this is achieved through Tesla Powerwall itself with no interaction with an inverter.

Power goes out, the battery kicks back on in about 5 seconds providing stored battery power to supply the loads covered by the backup circuitry installed. If during a blackout and your solar battery is fully charged, this will cover all the loads of the devices on that circuit until the battery power is depleted or grid power is restored.

The backup circuit will usually be the circuit that your refrigerator runs on and any additional outlets connected to that circuit in your home so that you can ride out the blackout for the maximum amount of time until power is restored. You are able to run devices up to a maximum of 5kW which is the maximum output of the battery.

Nothing but the battery itself! Everything is included in the set of parts accompanying the battery.

It does not require a separate hybrid battery inverter or solar inverter or any other device to allow it to interact with a new solar system Natural Solar would install.

You also don’t require any additional hardware except the battery itself if you already have a solar system and are just getting Natural Solar to install the solar battery.

It can be integrated with existing PV installations as well as new solar power system installations.

To request a retrofit quote, please complete the automatic online quote form here to request a retrofit quote.

As it is only available as an AC Coupled device, yes you can just add it to a property with an existing solar system without issue.

Tesla Powerwall Home Battery Usage

No. One does not need PV/Solar power to operate the battery. The solar battery can be charged using AC power from the grid or a generator. Without PV, Tesla’s battery can be used for load shifting or backup power.

Tesla Powerwall is designed for daily use applications like self-consumption of solar and load shifting. Assuming full daily cycles, it is designed to provide energy for 3650 full cycles which is equivalent to 10 years of use. Tesla uses number of cycles as an easy illustration of throughput capacity and does not penalize the user for depth of discharge or partial cycles. Two half cycles or four quarter cycles are equivalent to one full cycle, as energy throughput is the key metric affecting lifetime. The term “cycle life” or “number of cycles” should be carefully used given some companies use those terms while not necessarily referring to a full cycle (0 –> 100% –> 0%).

Yes, multiple units can be connected to either increase energy, power, or both. A total of 10 units can be connected together in parallel.

Operation and Software Control

The unit comes with an in-built inverter which, combined with the Battery Management System (BMS) sends the signals to the unit when to charge and discharge.

The unit will operate in a self sufficient way. You can monitor the performance and status of your battery via the app.

The system will report battery status, including electrical parameters such as power, AC voltage, state of energy (SOE), and error codes.

Yes, the unit is updated remotely over the internet by Tesla.

Maintenance and Reliability

Tesla Powerwall does not require maintenance or servicing unlike lead-acid based batteries which require weekly monitoring and frequent maintenance.

If troubleshooting is needed, depending on the nature of servicing required, Natural Solar will provide the service.

Tesla Powerwall will operate without maintenance for at least 10 years as long as recommended operation procedures are followed.

Safety and Environmental

Yes, the Tesla Powerwall architecture has been built from the ground up to deliver multiple levels of protection. In addition, a highly sophisticated Battery Management System and liquid thermal control system ensures the batteries will always function in a safe manner. Tesla Powerwall is tested and certified to local market safety standards.

The safety of the battery cells within the unit is maintained by the unit.  The unit includes a highly sophisticated Battery Management System (BMS) that ensures the battery will always function in a safe manner. The BMS leverages the technology, lessons learned, and in-house expertise from the BMS used in the widely deployed Tesla car batteries.

Yes, the batteries inside are recyclable. At the end of life, Tesla will accept Tesla Powerwalls for recycling at the Gigafactory

The Tesla Powerwall is designed to be extremely safe. There is no fire hazard during normal operation.

Australia Specific

In Australia/New Zealand the Tesla Powerwall will be tested to the following certifications:
– IEC 62619
– AS/NZS 3100
– UN 38.3
– IEC 1000-3-2 (EN 61000-3-2)

First year of Powerwall = 92% saving – Nick Pfitzner story

In 2016, the year the first Powerwall launched, Nick Pfitzner installed a Tesla Powerwall at his home. This was the very first Powerwall to be installed in Australia and one year on the verdict is in. The testimonies below were both featured on the Sunrise TV program and clearly demonstrate how much can be saved with the home battery. Natural Solar are proud to have installed this Powerwall and are keen for others to learn of Nick’s positive experiences.

The first Tesla Powerwall installation in Australia

The Pfitzner Family, proud owners of the first Tesla Powerwall in Australia. Installed in 2016 by Natural Solar.

What makes the Tesla Powerwall battery system so special?

Tesla Powerwall makes financial sense.

  1. Stop giving your energy provider near-free energy! – Don’t sell your excess generated solar power back to the grid at a tiny feed-in tariff. Store it in the Tesla Powerwall for use later in the day or at night when you would otherwise be reliant on grid power at high on-peak rates.
  2. Double Dip – Don’t get just a single dose of cheap clean power by storing power in your battery generated from your solar panels. After using up some (or all) of your Tesla Powerwall stored power, charge it up at the off-peak rate for use in the morning when power costs jump back up to on-peak (or shoulder) rates. Tesla Powerwall enables a homeowner to maximise their solar self-consumption, in turn, this reduces reliance on using fossil fuel energy.
  3. The Tesla Powerwall has a long life span. When it’s no longer holding much charge the Powerwall can be recycled.
  4. Unlike lead-acid batteries, the Tesla Powerwall does not emit any gases into the atmosphere during its lifetime.
Natural Solar installs first sonnenFlat system in Australia. Family to receive $0 electricity bills. Read the press release
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