Negative Site Reading​​​​​​​​​​​​​​

On the landing page, the site value is negative. An alert will appear on the landing page

Steps to Troubleshoot

  • 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 200 A CT (for Tesla Remote Energy Meter) Orientation in Relation to Power Flow ➀
        Figure 2. Tesla 100 A CT (for Backup Gateway 2) Orientation in Relation to Power Flow
  • Confirm the CTs are measuring the correct phase:
    1. Locate the CT on the Meter page in the Device Setup interface in Tesla One.
    2. Determine which phase the CT should be measuring.
      • Backup Gateway 2 with Tesla 100 A CTs:
        CT1Line 1
        CT2Line 2
        CT3Defaults to Line 1 but can be configured as Line 2 during device setup in Tesla One
      • Tesla Remote Meter with Tesla 200 A CTs:
        CT1Line 1
        CT2Line 2
        CT3Line 2
        CT4N/A (CT4 functionality will be available at a later date)
    3. Verify the CT is measuring the correct phase.
Informational PurposesAn informational icon, calling your attention
Note
The site value can be negative if power is flowing to the grid.