Power/Current Limit Feature for Powerwall 3
Feature Overview
The default maximum power/current output for Powerwall 3 is 11.5 kW / 48 A. Beginning with software version 24.20, the power/current output can be configured to one of the following limits during device setup, except where it is limited by the local grid code requirements:
Maximum Continuous Current | Power Output (AC) | Breaker (Overcurrent Protection) |
---|---|---|
48 A | 11.5 kW (default) | 60 A |
41.7 A | 10 kW | 60 A |
31.7 A | 7.6 kW | 40 A |
24 A | 5.8 kW | 30 A |
This feature can be used for the following purposes:
- Compliance with utility-imposed requirements on maximum inverter power (for instance transformer capacity limits or interconnection requirements)
- Qualification for subsidies or economic benefits (for instance NEM integrity or SGIP)
- Replacing a Powerwall 2, Powerwall+, or solar inverter with a Powerwall 3NotePowerwall 3 is not compatible with Powerwall 2 or Powerwall+; follow all relevant codes and regulations and refer to the Powerwall Compatibility Table if retrofitting an existing system with Powerwall 3.
Installing and Configuring a Power/Current Limit
When installing Powerwall 3, select the appropriate Powerwall 3 breaker size depending on the desired power output (see the table above).
The Power/Current Limit is configured using Tesla One:
- If the system is running,
select Stop
System.
- Select
- Select the desired maximum current/power output from the dropdown menu.
- Select NoteOnce the setting has been confirmed, it cannot be changed by the installer. Contact Tesla Support if the setting must be changed. .
- Document the configured
maximum current output on the Powerwall 3 product label (use a
paint pen to mark the configured value).
Interconnecting Power/Current-Limited Powerwall 3 Units in Select Utilities
Some utility interconnection application portals do not provide a way to account for
the lower power rating of Powerwall 3. As a result, despite the
inverter operating at a lower power rating and satisfying permitting requirements,
the utility will evaluate Powerwall 3 at full power (11.5 kW) instead
of the lower value. This has the potential to cause the following complications:
- Forcing transformer upgrades
- Exceeding AC limits
- Disqualifying systems for incentives (like net metering)
Please take this into account during the site design process in the following
utilities:
- Central Hudson Gas & Electric
- Colton Electric Utility
- Consolidated Edison (ConEd)
- Eversource Energy (CT only)
- Fort Collins
- Georgia Power
- NV Energy
- Pasadena Water and Power
- PECO
Note
This list of utilities is not
exhaustive; other utilities may also evaluate Powerwall 3 at full power (11.5 kW)
instead of the lower value