About Tesla Remote Energy Meter

Tesla Remote Energy Meter Overview

Tesla Remote Energy Meter can be connected to Powerwall 3 via Wi-Fi or an RS-485 wiring harness.

Figure 1. Location of RS-485, AC, and External Antenna Terminals
At the time of publication, Tesla Remote Energy Meter has (3) CT terminals:
Figure 2. Location of CT Terminals

CT4 functionality will be available at a later date.

Tesla Remote Energy Meter LED

Tesla Remote Energy Meter has an LED which indicates the following status:
Solid green ON Powered and operational
Figure 3. Tesla Remote Energy Meter LED Location

About Voltage Taps and Current Transformer Connections

The Tesla Remote Energy Meter functions by measuring voltage (by voltage tap) and current (by Current Transformer, or CT) at key locations in the system. For the meter to function correctly, the following are critical:
  1. The Tesla Remote Energy Meter voltage line harness leads must be connected to the correct phases.
  2. The CTs must be placed around conductors of the correct phase:
    • CT1 = L1
    • CT2 = L2
    • CT3 = L3
The following illustrations provide some high level correct voltage harness wiring / CT installations:
Figure 4. Voltage Harness Wiring and CT Placement (1-Phase Service)
Figure 5. Voltage Harness Wiring and CT Placement (3-Phase Service)
Informational PurposesAn informational icon, calling your attention
Note
A single Tesla 200A CT can be placed around multiple conductors which are on the same phase, provided the sum of the conductor’s current ratings does not exceed the CT's maximum current capacity. This is especially useful for systems with multiple solar inverters.
Figure 6. CT Placement Around Multiple Conductors of Same Phase