Powerwall / Powerwall+ is Discharging at Full Power​​​​​​​​​​​​​​

Powerwall / Powerwall+ is discharging at its maximum discharge, and the site reading increases as Powerwall / Powerwall+ discharges

Steps to Troubleshoot

  1. If using external Site CTs:
    • Confirm the CTs are facing the correct way:
      1. Locate the CT(s) used to measure the source that is displaying incorrect power flow readings.
      2. Verify the CT(s) are oriented such that the label is facing toward the source (away from the breaker).
        1. Solar Current Transformer: Label toward the Inverter
        2. Site Current Transformer: Label toward the Grid
        Figure 1. Tesla 100 A Current Transformer Orientation in Relation to Power Flow
        Figure 2. Neurio W2 CT Correctly Oriented to Measure Solar (top) and Incorrectly Oriented (bottom)
    • Confirm the CTs are measuring the correct phase:
      1. Locate the CT on the Meter page in Tesla One.
      2. Determine which phase the CT should be measuring.
        Informational PurposesAn informational icon, calling your attention
        Note
        If using Gateway CTs, the ports are CT 1 (Line 1), CT2, (Line 2), CT 3 (defaults to Line 1 but can be configured as Line 2 in Tesla One).
        Informational PurposesAn informational icon, calling your attention
        Note
        If using a Neurio meter, the ports are A (Line 1), B (Line 2), B (Line 2), A (Line 1) and are determined by voltage reference.
      3. Verify the CT is measuring the correct phase.
        Figure 3. Gateway CT Measuring Correct Phase (top) and Incorrect Phase (bottom)
        Figure 4. Neurio W2 CT Measuring Correct Phase (top) and Incorrect Phase (bottom)
        Informational PurposesAn informational icon, calling your attention
        Note
        In the examples above, the CT is monitoring a solar inverter conductor, which is why only (1) CT is required.
  2. For systems with Backup Gateway 2, verify the supply conductors feeding the Gateway are connected to the Supply terminals:
  3. Verify any backup conductors are connected to the Backup terminals (or the internal panelboard if it is connected to the Backup terminals):
  4. Follow the steps in Gateway CTs and Neurio CTs are Overlapping to ensure site and solar loads are monitored only once, and the Powerwall conductors are not captured.