Powerwall / Powerwall+ is Not Charging from Solar​​​​​​​​​​​​​​

Powerwall / Powerwall+ in Self-Consumption mode is not charging even though solar is producing

Steps to Troubleshoot

  1. Toggle the Powerwall / Powerwall+ Enable switch OFF then ON.
  2. Confirm the Powerwall / Powerwall+ breaker is closed.
  3. Confirm the Powerwall / Powerwall+ LED is on.
  4. Confirm the Powerwall / Powerwall+ State of Energy is less than 100% on the landing page (if Powerwall / Powerwall+ is at 100% reserve, it does not need to charge).
  5. If the Powerwall / Powerwall+ has a low temperature (for instance, it was stored in a cold place immediately prior to installation) and it has been installed less than one hour, wait one more hour for it to begin charging.
  6. 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)
  7. 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.
  8. Check the Mode under Operation Settings on the Summary page in Tesla One. If the system is in Self-Consumption mode, Powerwall / Powerwall+ charges from excess solar that would otherwise be exported. If the site is importing, Powerwall / Powerwall+ doesn't have any excess generation from which to charge.