Negative Solar Reading

On the landing page, the Solar value is negative and does not match the solar production reading from the inverter

Symptoms

On the landing page, the solar value is negative and does not match the solar production reading from the inverter.

Note

For multi-product installations, see .

Note

To troubleshoot this issue, measure solar production using one of the following methods:

For Tesla Solar Inverter, use the Solar Inverter Configuration Interface or measure with a multimeter
For a third party inverter, use the display on the inverter itself (if present), the inverter production monitoring app, or measure with a multimeter

Steps to Troubleshoot

Confirm the CT is 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 CT is 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:
    CT1 Line 1
    CT2 Line 2
    CT3 Defaults to Line 1 but can be configured as Line 2 during device setup in Tesla One
  - Tesla Remote Energy Meter with Tesla 200 A CTs:
    CT1 Line 1
    CT2 Line 2
    CT3 Line 2
    CT4 N/A (CT4 functionality will be available at a later date)
3. Verify the CT is measuring the correct phase.
Ensure the CT has been placed in the correct location and is measuring the correct conductor(s):
1. Verify the CT is clamped properly around the intended conductor(s).
  Warning
  Before installing, disconnecting, and/or adjusting CTs, ensure the circuits being measured are not energized and the system is completely powered down. Failure to de-energize the system may compromise operator and equipment safety.
2. Verify the CT is not capturing any other conductor(s).
  Note
  If a site has multiple inverter outputs and their conductors are being grouped, ensure every conductor is captured.

CT1	Line 1
CT2	Line 2
CT3	Defaults to Line 1 but can be configured as Line 2 during device setup in Tesla One

CT1	Line 1
CT2	Line 2
CT3	Line 2
CT4	N/A (CT4 functionality will be available at a later date)