Plan Cable Length Between Components

Follow the table below for maximum distances between system components. Wire gauge must meet local codes and in some circumstances wire gauge requirements change based on distance. Refer to Appendix B for wire gauge requirements.

Maximum Cable Length
CAN communication wiring between Gateway 3 and Powerwall(s)* 150 ft (45 m) for 16 AWG (1.5 mm2) wire
82 ft (25 m) for 18 AWG (0.8 mm2) wire
Wired Ethernet connection (minimum Cat5) 328 ft (100 m)
Total PV circuit distance** 525 ft (160 m)

*Total length of communications cable, including daisy-chained connections, through last Powerwall in chain

**Ensure that total DC circuit distance, from + MPPT terminal to - MPPT terminal (including module wire leads, jumper wires and all wiring within the array boundary for any individual string), does not exceed 160 m for single strings
  • Total DC circuit distance refers to the entire round trip wire distance, from Powerwall 3 to the roof, then back to Powerwall 3
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Note
As noted in Required Supplies, minimum 600 V rated 4-conductor (twisted pair optional) or double-insulated (with one twisted pair) shielded copper (Cu) cable is required for the communication connection between Powerwall and the Gateway 3; see Required Supplies for custom cable requirements.
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CAUTION
Failure to follow minimum cable size and length requirements may result in intermittent or unreliable operation of the Powerwall system. In systems that do not meet these minimum requirements, performance issues may arise even after successful commissioning.