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 Powerwall software version 24.20, this value can be permanently configured to one of the following power / current levels during device setup:

Table 1. Maximum Continuous Power / Current Options
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 3
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    Note
    Powerwall 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 Maximum Continuous Current Options table above).

The Power / Current Limit is configured using Tesla One:
  1. If the system is running, select Stop System.
  2. From the Devices tab on the System page, select the Powerwall 3.
  3. Select Max Current Output.
  4. Select the desired maximum current / power output from the dropdown menu.
  5. Select Confirm Max Output.
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    Note
    Once the setting has been confirmed, it cannot be changed by the installer. Contact Tesla Support if the setting must be changed.
  6. Document the configured maximum current output on the Powerwall 3 product label (use a paint pen to mark the configured value).
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    Note
    If required, install a PCS field marking label on the side of Powerwall 3 and mark the configured maximum current output on the label.

Interconnecting Power / Current-Limited Powerwall 3 Units in Select Utilities

Some utility interconnection software systems 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:
  • Eversource (MA & CT)
  • Fort Collins
  • Orange & Rockland (NJ & NY)
  • Georgia Power
  • NV Energy
  • Consolidated Edison (ConEd)
  • Arizona Public Service (APS)
  • Salt River Project (SRP)
  • Trico Electric Cooperative
  • Texas New Mexico Power (TNMP)
  • Sacramento Municipal Utility District (SMUD)
  • Glendale Water and Power (GWP)
  • Pasadena Water and Power (PWP)
  • Colton Electric Utility
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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