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 Backup Switch 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 | |
Expansion Harness Length | See Expansion Harness |
Wired Ethernet connection (minimum Cat5) | 328 ft (100 m) |
Total PV circuit distance* | 525 ft (160 m) |
*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
Note
As noted in
Required Supplies, minimum 600
V rated 4-conductor (two twisted pairs) shielded copper (Cu) cable is required for the
communication connection between Powerwall and the Backup Switch; see Required Supplies for custom
cable requirements.
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.