Install the Meter and CTs

Tesla Solar Inverter with Site Controller (1538000-45-y) has a factory-installed Neurio meter in its enclosure; where possible, additional CTs can be installed and extended to measure Site. Where the CTs cannot be extended to measure Site, and for all other Solar Inverter variants, a new Neurio meter must be installed as follows.

Install the Meter

  1. Using the screws provided in the meter kit, attach the mounting plate to the inside of the main distribution board or to another surface. Choose a location that takes into account the voltage line harness and CT cable lengths.
  2. On the voltage line harness, combine the blue and red leads as shown below.
  3. Plug the voltage line harness into the meter.
  4. Connect the voltage line harness leads to a dedicated two pole circuit breaker (not exceeding 20 A):
    Voltage Harness Phase and Wire ColorBreaker Terminal
    A (black)L1 (Phase A)
    B (red)L2 (Phase A)
    C (blue)Spliced with the Red B wire
    N (white)Neutral busbar
    Informational PurposesAn informational icon, calling your attention
    Note
    If a dedicated circuit breaker is not available, the voltage line harness can be spliced to existing breakers.
    Informational PurposesAn informational icon, calling your attention
    Note
    Ensure the breaker phases align with the supply phases. Some models cross phases so that the breaker is the opposite phase of the supply lug above it.

Install the Antenna

To install the antenna, screw it onto the meter. It is recommended to locate the antenna outside the enclosure using the included antenna extension:

  • Locate a 1/2” or 3/4" knockout and install a cable gland.
  • Mount the antenna by threading the extension cable through the included knockout mount and securing the mount.
  • Screw the antenna onto the extension cable and connect the extension cable to the meter.
Figure 1. Antenna Port (left) and Antenna Extended and Installed Outside Enclosure (right)

Install the CTs

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Note
For each CT, ensure the CT is installed with the label SOURCE THIS SIDE on the CT housing pointing toward the power source (service entrance / grid for Site CTs, solar inverter for Solar CTs). Always verify CTs are in the correct orientation by observing power flow in the Commissioning Wizard.
Figure 2. CT Orientation in Relation to Power Flow
  1. Install the Site CTs upstream of all loads and generation:
    1. Plug the CT measuring L1 (Phase A) into the CT1 or CT4 port on the meter.
    2. Plug the CT measuring L2 (Phase B) into the CT2 or CT3 port on the meter.
    3. Clamp the CTs around the L1 and L2 conductors where Site is being measured.
  2. If necessary, install a Solar CT around the Solar Inverter conductor (only required for sites that qualify for Solar Renewable Energy Credit (SREC) programs):
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    Note
    For Tesla Solar Inverter with Site Controller (1538000-45-y), the Solar CT is factory-installed and this step can be skipped.
    1. Plug the CT into a port on the meter.
      • For L1, plug the CT into the CT1 or CT4 port
      • For L2, plug the CT into the CT2 or CT3 port
    2. Clamp the CT around the appropriate Solar Inverter conductor based on the port it is plugged in to.
    Informational PurposesAn informational icon, calling your attention
    Note
    Only one CT is required to measure Solar because total power output is calculated by the software.