Tesla Powerwall

As Australians transition towards a more sustainable future, solar power has become a preferred choice for many households and businesses. And now storing solar energy in batteries is also becoming popular. One key player in battery storage space is the Tesla Powerwall, a home battery storage system that has redefined how we harness and utilise solar energy.

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Introducing the Tesla Powerwall

The Tesla Powerwall is a sophisticated energy storage solution, essentially a large-scale battery engineered to store energy produced by your solar power system during daylight hours. Rather than returning surplus power to the grid and getting what is now, in most cases, a pathetic feed-in tariff, the Powerwall captures and conserves your solar energy. When your home's energy usage surpasses the solar system's production, typically during the night, the Powerwall steps in, enabling you to utilise your own renewable, eco-friendly energy. This functionality has made the Powerwall a favourite in Australia, where solar power adoption is high, and homeowners value enhanced independence and decreased grid dependence.

Tesla Powerwall
Tesla Powerwall.
Image source: Solar Quotes Tesla Powerwall Reviews
AC Voltage (Nominal) 230 V
Feed-In Type Single Phase
Grid Frequency 50 Hz
Total Energy 14 kWh
Usable Energy 13.5 kWh
Real Power, max continuous 5 kW (charge and discharge)
Apparent Power, max continuous 5 kVA (charge and discharge)
Maximum Supply Fault Current 10 kA
Maximum Output Fault Current 32 A
Power Factor Output Range +/– 1.0 adjustable
Internal Battery DC Voltage 50 V
Round Trip Efficiency 90%
Warranty 10 years

Source: https://www.tesla.com/sites/default/files/pdfs/powerwall/Powerwall%202_AC_Datasheet_en_AU.pdf

A distinguishing feature of the Powerwall is that it can be AC-coupled, allowing it to integrate with any existing solar system seamlessly. It can even be installed in homes without solar systems, offering a versatile solution for energy storage.

Tesla Powerwall's Energy Capacity

The Powerwall boasts a total energy capacity of 14kWh, with 13.5kWh of usable energy storage. This capacity is ample to cover the energy requirements of an average Australian residential property overnight. An average home utilises around 20kWh of power over a full day to give you a sense of scale.

Backup Power During Blackouts

A common query about the Powerwall pertains to its backup capabilities. The Powerwall is engineered to activate when the grid fails, offering comprehensive home backup or backup for selected circuits. It also includes a feature that allows you to set a minimum power reserve, ensuring sufficient energy is stored to power essential appliances during a blackout. For larger homes, multiple Powerwalls can be combined to enhance the backup and storage capacity.

Warranty Information

The Powerwall comes with a multi-tiered warranty. If you use the Powerwall for solar self-consumption, time-based control, and backup, the battery will retain 70% of its capacity for unlimited cycles over a 10-year warranty period. This implies that even after a decade of use, the Powerwall will still have 70% of its initial 13.5kWh output capacity.

Tesla Powerwall 2 AC Warranty (Australia and New Zealand)

The Tesla Mobile Application

A standout feature of the Powerwall is its integration with the Tesla app. This app enables Powerwall users to monitor and manage their energy usage from their smartphones. Users can view their solar system's production, their home's energy consumption, and the energy source at any time.

General Specifications of the Powerwall

The Powerwall has a 5kW max continuous charge and discharge rate, which means you can fully charge your battery in less than three hours and deplete it at the same rate. It can also handle a peak charge and discharge load of 7kW for a maximum of 10 seconds. The Powerwall is designed to operate in temperatures as low as -20 degrees Celsius and as high as 50 degrees, making it resilient against nearly all of Australia's weather conditions.

What Constitutes the Powerwall?

The Powerwall comprises Lithium NMC, including Nickel, Magnesium, and Cobalt. This cell chemistry is similar to what Tesla uses in their vehicles. It is excellent for battery density, which essentially means storing more energy in a smaller space, and it can charge and discharge very quickly.

Manufacturing the Tesla Powerwall

The Powerwall is manufactured in the Tesla Gigafactory in Nevada, USA. The Gigafactory, which commenced construction in June 2014, employs over 7000 people.

Installation Locations for the Tesla Powerwall

The Powerwall can be installed virtually anywhere, subject to regulatory guidelines. It can withstand wind and rain, making it suitable for indoor and outdoor installations. However, like any electrical device, it prefers not to be in direct sunlight, so that a shaded location can be beneficial.

Can You Install More Than One Tesla Powerwall?

You can install more if a single Powerwall doesn't meet your needs. When you install multiple Powerwalls, they are installed in parallel or stacked. Installing multiple Powerwalls augments your battery capacity and increases the battery's output to support a larger load. You can install up to 10 Powerwalls working in unison.

Final Thoughts

The Tesla Powerwall is a transformative product in renewable energy. Its capacity to store solar energy and provide backup power during blackouts makes it an invaluable asset for any home. With its impressive features and benefits, the Powerwall represents a stride towards a more sustainable and energy-efficient future.

Tesla Powerwall Customer Reviews

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