knowledge article

Tesla Powerwall 3 vs Powerwall 2: Making the Right Choice for Your Solar System in New Zealand‍


Are you considering a Tesla Powerwall for your home in New Zealand? With the upcoming release of Powerwall 3, potentially in 2025, it’s crucial to understand how it stacks up against the well-established Powerwall 2 to help you decide which one is the right choice for your solar system.

Energy Capacity

While the details for Powerwall 3 haven’t been confirmed yet, it’s expected that both Powerwall 2 and Powerwall 3 boast an impressive 13.5kWh storage capacity. This means that no matter which model you choose, you can expect enough energy storage to power your home during peak hours or as a backup during power outages. With either option, you gain the peace of mind that comes with energy independence and the ability to reduce your reliance on the grid.

Inverter Specifications

The Powerwall 2 is equipped with a versatile 5kW inverter, making it suitable for a wide range of home sizes and energy demands. In contrast, the Powerwall 3 is expected to offer an inbuilt inverter with a choice between a standard 5kW and a more powerful 10kW inverter, catering to homes with higher power consumption. While both options provide efficient energy conversion, the Powerwall 3 offers greater flexibility for homes with higher energy demands.

tesla powerwall 3

Integration with Solar Systems

A significant difference between the two models is their coupling method. The Powerwall 2’s AC coupling allows for easy integration with any existing solar system, making it ideal for retrofitting. If you already have solar, Powerwall 2 will be the better choice for you.

On the other hand, Powerwall 3’s DC coupling does not require a separate solar inverter to work. This ‘all-in-one’ solution, with its built-in inverter, simplifies installation but needs a direct connection to your solar panels. It is not compatible with other inverters or batteries, including the Powerwall 2. This makes the Powerwall 3 an option only if you are starting from scratch with a new solar panel installation.


With its AC-coupled system, Powerwall 2 is compatible with almost any inverter, providing flexibility for diverse solar setups. Whether you have your batteries in your garage at the main switchboard or your solar panels on a shed in the paddock, Powerwall 2 can accommodate your needs.

Powerwall 3, is tailored for roof flexibility, allowing for multiple solar panel orientations to be connected directly. However, the Powerwall 3 may not support solar panels on a shed in the paddock, as it requires a direct connection to the unit. If you have a more complex solar setup, Powerwall 2 may be the better choice for you.


Both Powerwall 2 and Powerwall 3 share similar compact dimensions with Powerwall 2 being slightly taller and wider but thinner than Powerwall 3. Both offer a space-efficient energy storage solution that can easily fit in various home environments. 

tesla powerwall 2


Powerwall 3 is expected to be more expensive than Powerwall 2 due to its inbuilt solar inverter. However, it's important to note that Powerwall 2 is the most cost-effective on the market. Despite the Tesla brand's reputation for premium pricing, Powerwall 2 offers exceptional value for its quality and performance. If cost is a significant consideration for you, Powerwall 2 may be the better choice.

What’s Best for You in New Zealand: Making the Right Decision

For New Zealand homeowners, the choice between Powerwall 2 and Powerwall 3 depends on your current solar setup and future energy goals.

Whatever you choose just know that Harrisons Solar is New Zealand’s only premium certified Tesla Power installer and NZ”s #1 retailer of Solar and Tesla Powerwall - so we will help guide you in the right direction.

Powerwall 2 is a proven and versatile option, with reliable performance and a cost-efficient kWh rating. It is an excellent choice for retrofitting options and offers seamless integration with any existing solar system. Even when Powerwall 3 is available, Powerwall 2 will remain the battery of choice for homeowners looking to add battery storage to their solar system.

Powerwall 3, anticipated to be released in 2025, offers an all-in-one solution with a built-in solar inverter. It is ideal for new solar setups and provides the convenience of a single unit for both energy storage and solar conversion. However, the additional cost and limited compatibility with other inverters and batteries may make Powerwall 3 less suitable for homeowners with existing solar systems.

Remember, whether you choose the adaptable Powerwall 2 or Powerwall 3, your decision contributes to a greener future for New Zealand. Both options offer the benefits of energy independence, reduced reliance on the grid, and the ability to maximise your solar power usage.

Ready to unlock the power of Tesla Powerwall in New Zealand? Contact us today for a FREE assessment.

Note: The information provided in this article is based on available knowledge and may be subject to change as new updates become available. It is always recommended to consult with us for the most accurate and up-to-date information regarding Tesla Powerwall products.

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