TESLA POWERWALL 3: 13.5KWH HOME BATTERY WITH INTEGRATED SOLAR INVERTER

Tesla Powerwall 3 is a home energy storage system that combines battery storage and a solar inverter in one unit. Unlike older battery systems that need separate inverters, Powerwall 3 handles everything—it stores up to 13.5 kWh of electricity and powers your home 24/7. It works with both new solar installations (DC-coupled) and existing solar systems (AC-coupled).

The unit measures 609mm wide, 1099mm tall, and 193mm deep, weighing 130kg total. To put that in perspective, it's roughly the size of a water heater or large refrigerator. You can mount it on the floor or wall, indoors or out, so there's flexibility in where you put it—garage, shed, or external wall all work fine.

Powerwall 3 delivers 10kW continuously, whether you're exporting to the grid or running backup power during an outage. That's enough to run your air con, EV charger, hot water system, and kitchen appliances all at the same time without the system struggling. For comparison, older systems max out at 5-7kW, so you get significantly more headroom.

Yes, you can swap out your Powerwall 2 for a Powerwall 3. Since they're not compatible together, full replacement is the route. The upgrade makes sense though: 40% more power output, integrated inverter (saves money), better efficiency, and the same 10-year warranty.

Absolutely. It's built for solar. If you're putting in new panels, it connects directly (DC-coupled) for maximum efficiency at 97.5%. If you already have solar, it plugs into your existing inverter (AC-coupled) and stores excess generation during the day for evening use.

It does. Powerwall 3 is CEC-approved and meets all the requirements for the federal Cheaper Home Batteries Program. Depending on your state, there might be additional local rebates too.

At 13.5 kWh, a single Powerwall 3 covers about 1-2 days of typical household energy for most Australian homes. But you're not locked into that. You can stack up to 3 expansion packs behind it (each adding another 13.5 kWh) to reach a maximum of 54 kWh if your needs grow.

The built-in 10kW inverter is one of the main reasons Powerwall 3 stands out. It can handle up to 20kW of incoming solar through 3 separate MPPT inputs, converts solar to grid at 97.5% efficiency, and outputs 10kW continuously in both directions (grid export and backup mode). No external inverter required—it's all built in.

You get 10 years of manufacturer coverage, and Tesla guarantees the battery will retain at least 70% of its capacity over that decade. If anything fails, it's replaced at no cost. On top of that, Elite Power Group provides a 10-year workmanship warranty on the installation itself. Software updates are free and come automatically through the Tesla app.

13.5 kWh on its own. If you add expansions, here's the breakdown:

• 1 pack added = 27 kWh
• 2 packs = 40.5 kWh
• 3 packs = 54 kWh (the maximum)

Each expansion is another 13.5 kWh, and none of them need their own inverter.

Yes, and it's automatic. When the grid goes down, Powerwall 3 detects it and switches to backup mode in milliseconds—no manual flipping of switches. You'll have power for lights, heating/cooling, fridge, and other essentials as long as the battery has charge.

Three. You can add up to 3 expansion packs to a single Powerwall 3, giving you a maximum of 54 kWh total storage. You don't have to buy all of them at once—many customers start small and expand later as their energy needs change.