Multi-Powerwall 3 Installations

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).

Note

See the Powerwall 3 Installation Manual (with Backup Gateway 2, Backup Switch, or Gateway 3) for instructions to install Powerwall 3 with Expansion unit(s), including structural requirements for stacked configurations and Expansion Harness selection for wall-mounted configurations.


Maximum Number of Powerwall 3 Units	Up to (4)Powerwall 3 units
Leader Powerwall 3	The Powerwall 3 connected to the via 12V / CAN communication wiring is designated as the Leader Powerwall 3 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) 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

Figure 1. *Up to* Four Powerwall 3 Units with *up to* Three Expansion Units, Installed with Backup Switch

Figure 2. *Up to* Four Powerwall 3 Units with *up to* Three Expansion Units, Installed with Backup Gateway 2

Figure 3. *Up to* Four Powerwall 3 Units with *up to* Three Expansion Units, Installed with Gateway 3

System Shutdown Switch with Multiple Powerwall 3 Units

Where a System Shutdown Switch is required, connect eachPowerwall 3 to a dedicated electrical contact of the switch. Ensure the installed System Shutdown Switch has enough electrical contacts for the number of units installed.

Figure 4. Good Wiring Example: Each Unit Connected to Electrical Contact in E-Stop

Figure 5. Bad Wiring Example: Both Powerwall 3 Connected to a Single Electrical Contact

Figure 6. Bad Wiring Example: Powerwall 3 Units Connected to E-Stop in Series (Does Not Work)

Figure 7. Bad Wiring Example: Second Powerwall 3 Not Connected to E-Stop

Connecting Powerwall 3 Units via Ethernet

All Powerwall 3 units must be connected via Ethernet. The units can be connected in any order, so long as each unit is connected to at least one other unit.

Figure 8. Option 1: Leader Powerwall 3 Connected to Customer Router via Wi-Fi (Leader at Start of Chain)

Figure 9. Option 2: Leader Powerwall 3 Connected to Customer Router via Wi-Fi (Leader in Middle of Chain)

Figure 10. Option 3: Leader Powerwall 3 Connected to Customer Router via Ethernet

Note

If connecting the system to the customer router via Ethernet, connect the router to either the first or last Powerwall 3 in the chain. Do NOT connect the router in the middle of the chain.

Commissioning Multi-Powerwall 3 Systems

For instructions to commission a multi-Powerwall 3 system, as well as for troubleshooting steps for common issues, see the Powerwall 3 Device Setup Guide.