Make AC Power Connections

The Tesla Solar Inverter shall be connected to a 240V (split-phase) AC service. A circuit breaker shall be used for overcurrent protection on the AC conductors. A 40 A circuit breaker shall be used for the 7.6 kW variant, and a 20 A circuit breaker shall be used for the 3.8 kW variant.

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Note
Previous versions of Tesla Solar Inverter (excluding Tesla Solar Inverter with Site Controller (1538000-45-y)) are also compatible with a 208V AC, 60 Hz service with 120V line to ground (see Supported Grid Configurations for Previous Tesla Solar Inverter Variants).
  1. Disconnect the AC circuit breaker of the main service disconnect and secure it against reconnection.
  2. For the AC conductors:
    1. Strip the conductor insulation up to 10 mm (0.4 in). If the conductor is finely stranded, provide it with a ferrule.
    2. Insert a cabinet tip or electronics tip slotted screwdriver (up to 3.2 mm or 1/8-inch) into the actuation shaft to open the terminal.
    3. Insert the conductor as far as possible into the terminal and remove the screwdriver from the actuation shaft to close the terminal.
    4. Perform a pull test to ensure the conductor is fully seated in the terminal.
      Figure 1. AC Wiring for Solar Inverter (left) and Solar Inverter with Site Controller (right)
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      Warning
      A neutral is required for Solar Inverter with Site Controller. If neutral is not connected, the factory-installed Neurio meter will not power on.
  3. Connect the PV array equipment grounding conductor to an equipment grounding terminal in the Solar Inverter.
    Figure 2. Equipment Grounding Conductor for Solar Inverter (left) and Solar Inverter with Site Controller (right)
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Warning
Inserting conductors into the actuation shafts rather than the terminals can result in fire. Ensure conductors are inserted in the terminals.
  • Ensure the conductors are inserted into the terminal points (round openings) as far as they will go and not into the actuation shafts (rectangular openings)
  • Ensure that the terminal points are allocated to the correct conductors
  • Ensure that the conductors are plugged completely into the terminal points up to the insulation
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Note
This system is equipped with a power control system (PCS) which is suitably rated to provide branch circuit overcurrent protection. The controlled current setting shall not exceed the rating of any controlled busbars or conductor ampacity. Learn more about PCS features for Tesla Solar Inverter.
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Note
The PCS controlled current setting for each PCS controlled conductor or bus bar shall be indicated with a field applied marking label on the conductor or in close proximity to the busbar.
Figure 3. PCS Field Marking Label
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Warning
Only qualified personnel shall be permitted to set or change the setting of the maximum operating current of the PCS. The maximum PCS operating current setting shall not exceed the busbar rating or conductor ampacity of any PCS controlled busbar or conductor.
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Warning
Configuration of power control settings system or changes to settings shall be made by qualified personnel only. Incorrect configuration or setting of the power control settings may result in unsafe conditions.
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Note
The maximum operating currents in controlled busbars or conductors are limited by the settings of the power control system (PCS) and may be lower than the sum of the currents of the connected controlled power sources. The settings of the PCS controlled currents may be used for calculation of the design currents used in the relevant sections of NEC Article 690 and 705.
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Note
Maximum PCS Controlled Current setting: 32 A.