Tesla have announced Powerwall 3 will soon be compatible with the Tesla Powerwall with an upcoming software update.
Here's what we know Powerwall 2 owners can expect once Tesla release the software update to enable compatibility:
Tesla have announced they will support configurations that will include up to:
- 4x Powerwall 2 units,
- 1x Powerwall 3 unit and
- 3x Powerwall 3 Expansion units
That means if you have 4x Powerwall 2 units you have an existing 54kWh battery capacity and with the ability to add 1x Powerwall 3 unit and 3x Powerwall 3 Expansion units, that's another 54kWh battery capacity you can add to your existing system.
Giving you potentially up to 108kWh of battery capacity with a combined Powerwall 2 and Powerwall 3 setup.
Tesla have announced that the compatibility will be enabled through a software update, not a hardware retrofit, no additional hardware costs.
Powerwall 2 installations remain compliant, even if the CEC listing has expired, only new installations of Powerwall 3 equipment need to meet current certification requirements.
Other things to note is if you plan to add a Powerwall 3 to your Powerwall 2 set up, if you have a Gateway 1, this will be not supported and you will need to upgrade your Gateway to the current Gateway 2.1.
If you have a neurio meter on your existing Powerwall 2 setup, as neurio meters are not compatible with Powerwall 3, this set up is currently not compatible.
Tesla have also advised if you are installing on a three-phase grid connection, the Powerwall 3 inverter will be limited to 5kW.
More details on the commissioning guidelines including details such as installation manuals and installer notes will be released when Tesla are closer to the launch of the software update.
Here is an example schematic provided by Tesla on how the system would look.
