Powerwall 3 Expansion

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  • 2025

  • Product
    Domestic Appliances

Designed By:

Commissioned By:

Tesla Energy

Designed In:

United States of America

Powerwall 3 Expansion is a plug-and-play add-on for Powerwall 3, giving homeowners the flexibility to scale energy storage as their needs grow. Whether driven by home electrification or energy independence, it enables cost-effective backup, more solar usage, and supports a cleaner, more affordable, and reliable energy future for Australia.


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  • CHALLENGE
  • SOLUTION
  • IMPACT
  • As renewable energy use and home electrification continue to grow across Australia, homeowners are increasingly seeking simple, affordable ways to store excess solar and increase energy independence. However, expanding home battery systems can be complex, often requiring additional wiring, grid approvals, and higher installation costs. Tesla solves this with a modular solution. Powerwall 3 Expansion increases storage capacity without the need for new inverters or extra equipment. Each unit connects directly to the main Powerwall 3 using an Expansion Harness, eliminating the need for custom wiring, trenching, or wall routing. This makes installation faster, simpler, and more cost-effective for everyone.

  • Powerwall 3 Expansion was designed to blend in, not stand out. It shares the same minimalist design as Powerwall 3 to maintain a clean, cohesive look. To reduce cost and complexity, the internal inverter was removed, making the unit slimmer. The missing LED light behind the Tesla "T" logo subtly distinguishes it from the main Powerwall 3. Key design features include: - Plug-and-Play Installation: No complex wiring or grid approvals required. Connects directly to the main Powerwall 3 using an Expansion Harness. - Flexible Mounting: Can be mounted on the wall or floor, with up to three Expansions stacked per Powerwall 3.

  • 1. Environmental: Helps households store more clean energy and reduce reliance on the grid, supporting Australia’s transition to a more sustainable, low-emissions future. 2. Societal: Improves access to reliable backup power during outages, which is especially important in remote and disaster-prone areas. 3. Customer Value: Provides a simple, cost-effective way for more families to maximise their solar investment, lower electricity bills, and achieve energy independence. Powerwall 3 Expansion also overcomes some of the technical limitations imposed by distributors that have previously made home energy storage feel out of reach.