Make Powerwall 3 Wiring Connections
Make Powerwall 3 PV Power Connections
![](GUID-F4B7FEE5-5633-4131-BDAB-AD06075E287F-online-en-US.png)
1 |
MPPT Positive PV inputs: 10-6 AWG (6-16 mm2) |
2 |
MPPT Negative PV inputs: 10-6 AWG (6-16 mm2) |
3 |
Ground terminals: 12-4 AWG (2.5-25 mm2) |
4 | Gather conductors in provided cable tie |
5 | Leave a service loop |
- Jumpers can be used when IMP > 13A. Use jumpers to allow a single MPPT to intake strings with a total IMP up to 26A
- Land the combined circuit (2 strings in parallel = 1 circuit) or string with
IMP greater than 13A in the terminal and connect the jumper
from:
- MPPT 1 to MPPT 2
- MPPT 5 to MPPT 6
- MPPT PV inputs 3 and 4 cannot be combined and are closed from the factory
- Only use the Powerwall 3 MPPT jumpers (Tesla P/N 1784893-xx-y) provided in the Powerwall 3 accessory bag
Figure 1. Powerwall 3 MPPT Jumper - Do not use jumpers on Solar Roof jobs - you cannot parallel more than two strings so combined circuit IMP will always be less than 13A DC
- Ensure each jumper is fully seated in the connector!
![](GUID-1553368C-1CBC-4A83-83EB-254DD82F215B-online-en-US.png)
![](GUID-BF103B07-2B22-486A-940D-0BC3B5C7E33F-online-en-US.png)
![](GUID-AC9E28E9-6B85-4454-AA53-83226F7832F0-online-en-US.png)
Connect Powerwall 3 to the Backup Switch or Backup Gateway
![](GUID-52DC89FB-5F74-4A88-BA48-0CF2FAE77100-online-en-US.png)
1 |
CN- (CAN LO): 24-16 AWG (0.2-1.5 mm2) |
2 |
CN+ (CAN HI): 24-16 AWG (0.2-1.5 mm2) |
3 |
GND: 24-16 AWG (0.2-1.5 mm2)* |
4 |
12V+: 24-16 AWG (0.2-1.5 mm2)* |
5 | Strip back the cable jacket so that the wires lay flat, leaving room to install the front cover. Route the cable through the lower left tab |
6 | Leave a service loop |
*18 AWG is the recommended minimum wire gauge due to potential voltage drop on long wire runs.
Make Powerwall 3 AC Power Connections
Connect Powerwall 3 to a 60A breaker.
![](GUID-9418DC85-68A0-4E7B-9CC9-3288671741D7-online-en-US.png)
1 |
N / L2 / L1: 10-4 AWG (6-25 mm2) |
2 |
Ground terminals: 12-4 AWG (2.5-25 mm2) |
3 | Gather conductors in provided cable tie |
4 | Leave a service loop |
Install System Shutdown Switch Where Required
![](GUID-0A123817-E991-4943-AAD8-4469DE7D8118-online-en-US.png)
1 |
Rapid Shutdown IN: 24-16 AWG (0.2-1.5 mm2) |
2 |
Rapid Shutdown OUT: 24-16 AWG (0.2-1.5 mm2) |
3 | Remove RSD jumper when installing System Shutdown Switch; otherwise, leave installed |
4 | Strip back the cable jacket so that the wires lay flat, leaving room to install the front cover. Route the cable through the lower left tab |
5 | Leave a service loop |
6 | Connect the RSD wiring to a suitable DC switch (see the Powerwall 3 with Backup Gateway 2 or Backup Switch installation manual for full details) |
Install Ferrite Cores / Metal PV Shield
For Powerwall 3 P/N 1707000-00-J and higher, install the metal PV shield and LV ferrite core:
![](GUID-7B7C68E3-E9BB-4D47-97F8-F1DC1FBEB974-online-en-US.png)
![](GUID-43CA0AB7-B116-48E1-B0DC-CE773BD70AD4-online-en-US.png)
1 | Low voltage harness ferrite |
2 | Metal PV shield |
For Powerwall 3 P/N 1707000-00-H and lower, install the (3X) ferrite cores:
![](GUID-1FD86A7F-4E1A-4311-8D7C-F1D6560776AE-online-en-US.png)
1 | AC ferrite |
2 | PV ferrite |
3 | Low voltage harness ferrite |
Secure each ferrite with its provided cable tie.
Important Notes on Wire Routing
![](GUID-949CDAD1-078D-416D-AAE5-881CD231A786-online-en-US.png)
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3 |
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![](GUID-FF4EE385-9B60-48A7-B47F-02D633C1FDFA-online-en-US.png)
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![](GUID-3BE9A15A-7620-4562-A2EB-CB8C5B6F9040-online-en-US.png)
1 | AC wires are routed across the front of the enclosure which would prevent the front cover from being installed |
2 |
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![](GUID-4CA0B85A-92EA-4BB1-8754-1ECF053E5A19-online-en-US.png)
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![](GUID-679B50F4-9CFA-41EB-981B-B9EA8D11AF78-online-en-US.png)
1 | AC and PV wiring do not have service loops |
2 | Communication cable is routed from top; no drip loop creates the potential for water to follow the cable and drip into the wiring terminals |
3 | AC and PV wires are not secured with cable ties |