STEP 8: Install System Shutdown Switch Where Required

Where required by local code, Powerwall 3 can be wired to a remote System Shutdown Switch that manually initiates rapid shutdown, disabling solar output.

The Powerwall 3 On/Off switch is also certified to UL 1741 as a means of manually initiating rapid shutdown. See Appendix D: Solar Rapid Shutdown for more information on the function of both the Enable switch and the System Shutdown Switch.

CAUTION

The System Shutdown Switch must be connected to Powerwall 3. Do not connect it to the Backup Gateway 2, as it will not work.

Install the System Shutdown Switch

Warning

Before terminating any conductors inside Powerwall 3, ensure that the Enable switch is turned OFF to de-energize the system. Confirm lack of voltage at the AC and PV terminals before proceeding.

Remove the factory-installed jumper from the RSD IN / RSD Out ports on the Powerwall 3 RSD connector. See Appendix B: Wiring Reference for a detailed wiring reference.
Wire the 2-conductor communication wire (minimum 24 AWG conductors) to the RSD ports:
1. Strip the communication wire jacket so that it does not extend past the edge of the fan duct. This ensures the individual conductors lie flat, leaving room for the front cover to be installed.
2. Strip each conductor 5/16 inch (8 mm).
3. Route the two conductors to the connector as shown below, using the wire management tab to prevent them from blocking the Tesla Asset Controller.
  CAUTION
  Tesla recommends routing the communication wiring into the left side of the enclosure; always use the wire management tabs to ensure wires do not block the Tesla Asset Controller. Do not route loose wires through the front of the enclosure.
4. Insert a cabinet tip or electronics tip slotted screwdriver (up to 3/32-inch or 3 mm) into each screwdriver slot to open the terminal.
5. Insert each conductor as far as possible into the terminal and remove the screwdriver from the screwdriver slot to close the terminal.
  CAUTION
  Excessive force may damage the connector; do not apply more force than is necessary to open the terminal and insert the conductor.
Connect the 2-conductor communication wire to a suitable DC switch (requirements below).

Switch Requirements

System Shutdown Switches shall meet the following requirements.

Listed or Recognized as "Emergency Stop Button", "Emergency Stop Device", "Emergency Stop Unit", meeting one of the following standards:
- UL 508 "Industrial Control Equipment"
- UL 60947-1 "Low-voltage switchgear and control gear- Part 1: General Rules" AND Part 5-1: Control Circuit Devices and Switch Elements - Electromechanical Control Circuit Devices" AND UL 60947-5-5: Mechanical and functional performance requirements
Normally Closed (NC) switch contacts
Rated for at least 12 V, 1 A
Outdoor rated (NEMA 3R or higher)
Terminals must accept 24 AWG wire or larger

Recommended Switch Components

The following product (composed of all parts listed below) meets all above requirements for this application:


Emergency Stop Button Option 1: Eaton	Eaton M22-PVT	Emergency Stop Button
	Eaton M22-I1-PG	Emergency Stop Enclosure
	Eaton M22-K01PV6	Emergency Stop Contactor Block (240V, 6A)
Emergency Stop Button Option 2: Schneider	Schneider XALD01H7	Emergency Stop Enclosure
	Schneider ZB5AT84	Emergency Stop Button
	Schneider ZB5AZ009	Emergency Stop Collar
	Schneider ZBE102	Emergency Stop Contact Block
	Schneider ZBZ1605	Emergency Stop Guard Yellow
	Schneider ZBZ1602	Emergency Stop Guard Black
Low voltage communication wire (Powerwall 3 communication cable preferred)
½-inch Strain Relief or equivalent
(4) Fasteners and anchors for the 5/16-inch (8 mm) mounting holes on the enclosure

Installation Guidelines for the System Shutdown Switch

Up to three Powerwall 3 units can be connected to a single System Shutdown Switch
Installed externally in a readily accessible location, preferably near utility meter
Maximum low voltage wire run from switch does not exceed 150 ft (45 m)
Control circuit must be installed as Type TC-ER or within an appropriate raceway