Additional Metering Configurations for Permanent Non-Export Systems
Note
See Appendix A: Powerwall+ and Powerwall 3 Permanent Non-Export for more
information on installing metering for a permanent non-export system. The following diagrams
are simply additional examples of permanent non-export metering configurations.
Example 1: Powerwall+ Permanent Non-Export System with Only Controlled Solar
| Energy to be Metered | Meter | CT(s) | Meter Configuration |
|---|---|---|---|
| Site backup loads | Backup Switch Meter Z | Backup Switch Meter Z | Preconfigured as Meter Z: Site |
| Powerwall+ Solar generation | Factory-installed Neurio meter | Factory-installed Neurio 200 A CT | Meter paired with Powerwall+ and CT field-configured as Neurio Meter: SolarCTx2 |
| Energy to be Metered | Meter | CT(s) | Meter Configuration |
|---|---|---|---|
| Site loads (backup and non-backup | Field-installed Neurio meter | Field-installed 200 A Neurio CTs | Meter paired with Powerwall+ and CT field-configured as
Neurio Meter: Site Note In this example, the Backup Gateway 2 Meter X CTs must be
configured as NONE. |
| Powerwall+ Solar generation | Factory-installed Neurio meter | Factory-installed Neurio 200 A CT | Meter paired with Powerwall+ and CT field-configured as Neurio Meter: SolarCTx2 |
Example 2: Permanent Non-Export System with Uncontrolled Solar Configured for Non-Export
| Energy to be Metered | Meter | CT(s) | Meter Configuration |
|---|---|---|---|
| Site loads (backup and non-backup | Field-installed Neurio meter | Field-installed 200 A Neurio CTs | Meter paired with Powerwall+ and CT field-configured as Neurio Meter: Site Note In this example, the Backup
Switch Meter Z CTs must be configured as NONE. |
| Powerwall+ Solar generation | Factory-installed Neurio meter | Factory-installed Neurio 200 A CT | Meter paired with Powerwall+ and CT field-configured as Neurio Meter: SolarCTx2 |
| Third party Solar generation | Field-installed Neurio meter | Field-installed 200 A Neurio CTs | Meter paired with Powerwall+ and CT field-configured as Neurio Meter: SolarCTx2 |
| Third party Site loads | Third party Site meter | Third party Site CTs | Configured by inverter installer to measure Site |
| Energy to be Metered | Meter | CT(s) | Meter Configuration |
|---|---|---|---|
| Site backup loads | Backup Gateway 2 Meter X | Backup Gateway 2 Meter X | Preconfigured as Meter X: Site |
| Site non-backup loads | Backup Gateway 2 Meter Y* | Field-installed Tesla 100 A CTs | Field-configured as Meter Y: Site |
| Powerwall+ Solar generation | Factory-installed Neurio meter | Factory-installed Neurio 200 A CT | Meter paired with Powerwall+ and CT field-configured as Neurio Meter: SolarCTx2 |
| Third party Solar generation | Backup Gateway 2 Meter Y* | Field-installed Tesla 100 A CT | Field-configured as Meter Y: SolarCTx2 |
| Third party Site loads | Third party Site meter | Third party Site CTs | Configured by inverter installer to measure Site |
*If the non-backup loads and/or third party solar were greater than 100 A, or if they were greater than 330 ft (100 m) from Backup Gateway 2, a field-installed Neurio meter and CTs would be required to monitor them.
Example 3: Permanent Non-Export System with Uncontrolled Solar NOT Configured for Non-Export
| Energy to be Metered | Meter | CT(s) | Meter Configuration |
|---|---|---|---|
| Site backup loads | Backup Switch Meter Z | Backup Switch Meter Z | Preconfigured as Meter Z: Site |
| Site non-backup loads (not present in example diagram above) | Field-installed Neurio meter | Field-installed 200 A Neurio CTs | Meter paired with Powerwall+ and CT field-configured as Neurio Meter: Site |
| Powerwall+ Solar generation | Factory-installed Neurio meter | Factory-installed Neurio 200 A CT | Meter paired with Powerwall+ and CT field-configured as Neurio Meter: SolarCTx2 |
| Third party Solar generation | Field-installed Neurio meter | Field-installed 200 A Neurio CTs | Meter paired with Powerwall+ and CT field-configured as Neurio Meter: SolarCTx2 |
Note
In this configuration, a system operating in Permanent Non-Export mode meets the
requirements of UL 3141 - 8.8.5 NEM Integrity Mode, such that the net export of the
combined third party and Powerwall systems will not exceed the real time output of the
third party system.
| Energy to be Metered | Meter | CT(s) | Meter Configuration |
|---|---|---|---|
| Site backup loads | Backup Gateway 2 Meter X | Backup Gateway 2 Meter X | Preconfigured as Meter X: Site |
| Site non-backup loads | Backup Gateway 2 Meter Y* | Field-installed Tesla 100 A CTs | Field-configured as Meter Y: Site |
| Powerwall+ Solar generation | Factory-installed Neurio meter | Factory-installed Neurio 200 A CT | Meter paired with Powerwall+ and CT field-configured as Neurio Meter: SolarCTx2 |
| Third party Solar generation | Backup Gateway 2 Meter Y* | Field-installed Tesla 100 A CT | Field-configured as Meter Y: SolarCTx2 |
*If the non-backup loads and/or third party solar were greater than 100 A, or if they were greater than 330 ft (100 m) from Backup Gateway 2, a field-installed Neurio meter and CTs would be required to monitor them.