Appendix G: Installing Multiple Powerwall 3 Units and/or Expansion Units

Multi-Unit Installation Overview

Powerwall 3 can be installed with additional Powerwall 3 units for additional solar and storage capabilities, and/or with Powerwall 3Expansion units for additional storage (kWh).

Maximum Number of Powerwall 3 Units Up to (4)Powerwall 3 units
Leader Powerwall 3 The Powerwall 3 connected to the Backup Switch via 12V / CAN communication wiring is designated as the Leader Powerwall 3
Informational PurposesAn informational icon, calling your attention
Note
The system is commissioned by connecting to the Leader Powerwall 3.
Follower Powerwall 3 Any Powerwall 3 other than the Leader is connected via inter-Powerwall Ethernet wiring and is designated as a Follower unit
Maximum Number of Expansion Units Up to (3) Expansion units (for a maximum total of (7) units)
Informational PurposesAn informational icon, calling your attention
Note
Expansion units must be connected to the Leader Powerwall 3; they will not function if connected to a Follower unit.
Powerwall 3 Compatibility with Expansion Units Powerwall 3 units with Tesla P/N 1707000-xx-J or greater are compatible with Expansions

Up to Four Powerwall 3 Units with up to Three Expansion Units