Solar Metering for Standalone Solar

Solar meters capture production from solar inverter(s). Install Solar metering in the following scenario:
  • A Powerwall system is installed with either Tesla Solar Inverter(s) or third party solar inverter(s): Install a Solar CT to monitor each Tesla Solar Inverter / third party inverter
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    Note
    Powerwall+ and Powerwall 3 perform Solar metering on their own Solar.

There must not be any loads or Powerwalls behind the Solar CTs. This would result in under- or over-estimation of solar production.

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Note
A single CT can be installed to measure a split-phase solar inverter, as total power output is calculated by software. If installing a single CT to measure Solar, toggle 1CTx2 ON during system setup. Using a single CT and not configuring it as 1CTx2 will prevent the system from measuring Solar correctly.

Solar can be monitored using Backup Gateway 2 Meter Y and Tesla 100 A CTs, or using a Neurio Remote Energy Meter:

  • Backup Gateway 2 only: If the solar is within 330 ft (100 m) of the Backup Gateway 2 and less than 100A, a Tesla 100 A CT can be used to monitor Solar. The CT is connected to the Backup Gateway 2 Internal Secondary Meter (Meter Y). Meter Y has three (3) CT ports, and one Tesla 100 A CT is included in the Backup Gateway 2 accessory kit. Additional Tesla 100 A CTs (Tesla P/N 1467316-00-x) may be ordered individually. See Install Tesla 100 A CTs with Backup Gateway 2 for instructions.
  • If the solar is greater than 330 ft (100 m) from the Site Controller and/or is greater than 100A, install a Remote Energy Meter and CTs to monitor Solar:
    • Tesla Remote Energy Meter is compatible with Powerwall 3, and its CTs can be extended up to 16.4 ft (5 m) using a Tesla 200 A CT Extension (Tesla P/N 2060713-xx-y).
    • Neurio Remote Energy Meter is compatible with Controller Powerwall+ and Backup Gateway 2, and its CTs can be extended up to 15 ft (4.5 m) using a Neurio CT Extension kit (Tesla P/N 1622289-xx-y).
Figure 1. Powerwall 3 and Backup Switch Example with Tesla Remote Energy Meter
Figure 2. Powerwall+ and Backup Gateway 2 Example with Neurio Meter
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Note
Neurio Remote Energy Meters are not compatible with Powerwall 3; Tesla Remote Energy Meter must be used with Powerwall 3.
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Note
If using a Neurio Remote Energy Meter, the Neurio meter must be able to communicate with the Site Controller; see Advanced Methods for Connecting Out-of-Range Neurio Meters to Site Controller if having difficulty pairing the Neurio meter with the Site Controller.