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. See Incorrect Setup of Current Transformer in the Commissioning Wizard for additional information on configuring CTs.

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.