Skip to content

Frequently Asked Questions

What is the Tesla Powerwall 2?

The Tesla Powerwall 2 is a home energy storage solution designed to store your excess solar energy or off-peak energy from the grid. You can use it as a backup power source during outages, or to reduce electricity costs by charging in cheaper price periods and using energy during peak hours.

How much energy can the Powerwall 2 store?

The Powerwall 2 has a usable capacity of 13.5 kWh (13.5 units of electricity). This is usually enough to power an average home for about a day, depending on energy consumption patterns.

How long does the Powerwall 2 take to charge?

The time it takes to charge a Powerwall 2 depends on the energy source (solar or grid) and the power output of the system. A typical solar system can take several hours to fully charge the Powerwall during daylight hours. If charging at the max charge rate of 5kW, the Powerwall will take around 2.7 hours to charge from completely flat.

Can I add a Powerwall 2 to my existing solar system?

Yes, the Powerwall 2 can be retrofitted to your existing solar systems, allowing you to store excess solar energy for later use and increase your energy independence. We will assess your setup to ensure the Powerwall will integrate with your current system.

Can I use the Powerwall 2 without a solar system?

Yes, the Powerwall 2 can be charged using electricity from the grid. This allows you to take advantage of lower electricity rates during off-peak periods and use the stored energy during peak periods, reducing your overall electricity costs.

Can the Powerwall 2 provide backup power during an outage?

Yes, the Powerwall 2 can provide backup power during a power outage. The changeover to backup power is instant, and the Powerwall has a high discharge capacity of 5kW to ensure that your home remains powered even when the grid is down.

What does a Tesla Powerwall cover in an outage?​

How much can be backed up, and for how long, depends on multiple factors such as the number of Powerwalls you have, the appliances in your home, and your energy usage. The Powerwall can be installed to back up your entire house or only selected loads. Even with ‘whole house’ backup, certain large loads (such as a spa pool) can be excluded. In very general terms, one Powerwall should be able to cover your emergency circuits, lights, and outlets.

How much does the Powerwall 2 cost?

The cost of a Powerwall 2 varies based on your location and installation requirements. The price also fluctuates depending on the exchange rate and supply. A typical fully installed Tesla Powerwall will likely cost $18-21k inc GST.

How long is the warranty for the Powerwall 2?

The Powerwall 2 comes with a 10-year limited warranty, which is one of the best battery warranties available. The warranty guarantees a minimum energy retention capacity of 70% at the end of the warranty period. In our experience, Tesla has the best warranty from any manufacturer.

How many Powerwall 2 units do I need for my home?

The number of Powerwall 2 units required depends on your energy consumption, backup power needs, and solar production. As a certified Tesla installer, we can perform an energy assessment to determine the optimal number of units for your specific situation. A single Powerwall usually suits an average energy user. However, if you are a high user, have a lot of solar generation, or require backup for an extended period, then two, three, or four Powerwalls could suit your needs.

Can I install the Powerwall 2 myself?

Tesla recommends professional installation by a certified installer to ensure the safe and effective operation of the Powerwall 2. Self-installation is not recommended and may void the warranty. We are not able to sell Tesla Powerwall units for installation by others.

Can I monitor and control the Powerwall 2 remotely?

Yes, you can monitor and control the Powerwall 2 using the Tesla mobile app. The app provides real-time data on energy production, consumption, and storage, as well as the ability to manage your system settings. You can also easily change your backup reserve incase of an approaching storm or planned outage.

How does the Powerwall 2 work with solar panels?

The Powerwall 2 stores excess energy generated by your solar panels during the day, allowing you to use that stored energy during the night or when solar production is low. This helps increase the self-consumption of solar energy and reduce reliance on the grid.

Can I connect multiple Powerwall 2 units together?

Yes, you can connect up to ten Powerwall units together to increase your energy storage capacity and backup power capabilities. With every Powerwall added, you will get another 5kW of charge/discharge capability. So with three Powerwalls, you will have the same size supply as a usual grid supply.

How long does it take to install a Powerwall 2 system?

Installation time varies depending on the complexity of the project, but most installations can be completed within one to two days.

Can the Powerwall 2 be installed outdoors?

Yes, the Powerwall 2 is designed to be installed both indoors and outdoors. It has a durable, weather-resistant enclosure that can withstand various environmental conditions. With built-in heating and cooling, it is the only battery that can manage its temperature.

How does the Powerwall 2 compare to other home energy storage solutions?

The Powerwall 2 is known for its high energy capacity, sleek design, and interactive monitoring app. While there are other home energy storage solutions available, the Powerwall 2 stands out due to its advanced technology, performance, great monitoring and ease of use.

What are the dimensions and weight of the Powerwall 2?

The Powerwall 2 measures 1150 mm tall, 753 mm wide, and 155 mm deep. It weighs approximately 125 kg.

How does the Powerwall 2 contribute to reducing my carbon footprint?

The Powerwall 2 helps reduce your carbon footprint by storing clean solar energy for use during periods of low solar production. This reduces your reliance on grid electricity, which may come from fossil fuel sources. In addition, utilising stored energy during peak periods can help decrease the overall demand on the grid, potentially reducing the need for additional fossil fuel-based power plants.

What maintenance is required for the Powerwall 2?

The Powerwall 2 is designed to be virtually maintenance-free, with no regular maintenance or servicing required. If any issues arise, the Tesla mobile app and remote monitoring capabilities allow Tesla to diagnose and address most problems without the need for a service visit.

Can the Powerwall 2 be used in off-grid applications?

The Powerwall 2 is primarily designed for grid-connected homes. Tesla doesn’t currently support off-grid, but they may at some point in the future.

Can the Powerwall 2 protect my home from power surges?

While the Powerwall 2 can provide backup power during outages, it is not designed to protect your home from power surges. It is recommended to use surge protectors for sensitive electronics and appliances to ensure their safety during power fluctuations.

When will the Powerwall 3 be available?

Although there’s been a lot of talk about the Powerwall 3, this hasn’t even been designed yet.

The good news is that the Powerwall 2 is already a market leader in the battery storage industry, so there’s really no need to wait for the Powerwall 3. 

Tesla is also continuously improving the Powerwall 2 through over-the-air firmware updates, improving both the user interface and the performance of the product.

Secure your Powerwall

Contact our friendly team to talk through next steps.