Add Follower Powerwall 3 and/or Expansion Units

Designate the Powerwall 3 Leader

The Powerwall 3 connected to the Backup Gateway over 12V/CAN wiring is designated as the Leader Powerwall 3. Before connecting to any Powerwall 3, note which unit is the Leader; any other unit(s) are Followers.

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As described in the following procedures, only commission and register the Leader Powerwall 3. Do not attempt to commission or register any Follower units.
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As shown below, Expansion units must be connected to the Leader Powerwall 3. They will not function if connected to a Follower unit.

Connect to Leader and "Scan for Devices" to Pair Follower(s) and/or Expansion Units

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Before pairing a Follower unit, ensure that each Powerwall 3 is on software version 24.20 or later. See Apparaatinstelling starten in Tesla One and Powerwall 3-software bijwerken to find the software version. If a Powerwall 3 is on an earlier version, update the software, and do not perform any other commissioning steps on any Follower unit.
  1. Connect to the Leader Powerwall 3 in the Tesla One Device Setup interface. See Apparaatinstelling starten in Tesla One for instructions.
  2. On the landing page, select Stop System.
  3. Select System > Scan for Devices.
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    Confirm all Follower units appear before proceeding. A green checkmark indicates the device has successfully paired.
  4. If the system has Expansion units:
    1. Confirm the Expansion units appear in the Devices tab.
    2. Confirm the Expansion serial numbers in Tesla One match those on the installed units (found on left side of unit).
    3. Select Update Expansions.
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      It should take a few minutes to update each Expansion.
    4. Confirm the aggregate Battery State of Charge (SOC) for Powerwall 3 and Expansion units is healthy (>10%).
      • If the SOC is <10%, ensure Device Setup has been successfully completed. If Device Setup could not be completed, turn the Powerwall 3 switch OFF and leave the Powerwall 3 breaker closed to enable charging.
  5. While connected to the Leader Powerwall 3, return to the landing page and select Start System.
  6. Wait for all device firmware updates to complete (to view progress, select System then review the Devices tab).
  7. If the system includes Expansion units, Balancing will automatically begin, with the system balancing (1) Expansion unit at a time. Within approximately one minute, Tesla One will display Balancing in Progress...
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    Expansion units have an internal relay that is initially opened. To close the relay, the voltage of each Expansion unit must be the same as the other units. The balancing process charges OR discharges the Powerwall 3 to match voltages across the units.
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    No installer action is necessary during balancing; as it may take from a few minutes to a few hours, it is not necessary to remain at the site until balancing is completed.
  8. Confirm there are no alerts and both solar and battery are operating for all Powerwall 3 units.
  9. Perform Backup Test to confirm the system is operating as expected. See Noodstroomtest uitvoeren for instructions.
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    The Backup Test is required and can be performed during balancing.
  10. Select Registration and register the system to the customer.
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    This will register the Leader Powerwall 3 and any Follower(s) to the customer.