Common Grid Configurations

The connection procedure varies depending on the grid configuration. The following table provides an overview of common grid configurations, which conductors have to be connected to the inverter to comply with the grid configuration and which country data set can be set. The inverter is designed to connect to a utility grid with either a 240 V split-phase system or a 208 V wye-connection system as standard. The grid configuration is set separately from the country data set. For an overview of these and other grid types, please refer to the technical information "INVERTERS & UTILITY GRID CONFIGURATION" in the download area at www.SMA-Solar.com.

For 208 V grids, note the settings for the grid support functions (see inverter manual).

Compatible grid configuration

Conductors to be connected

Configurable country data sets

120 / 240 V split-phase system

L1, L2 and N

  • [CA] CSA C22.3 No.9:20

  • [Offgrid] SMA stand-alone mode 50 Hz PV inverter

  • [Offgrid] SMA stand-alone mode 60 Hz PV inverter

  • [US] CA-R21 IEEE1547:2018 Cat.B III: Used when the requirements of California Rule 21 must be met.

  • [US] UL1741/SB Cat B-III Storage: Supports the requirements of large-scale PV power plants and distribution networks in accordance with California Rule 21 and Hawaii Rule 14H. Used if the utility company does not specify a specific country data set and there is a battery in the system.

  • [US] UL1741/SB Cat.B-II: Supports voltage ride through (VRT) from DER for all large-scale PV power plants.

  • [US] UL1741/SB Cat.B-II Storage: Supports voltage ride through (VRT) from DER for all large-scale PV power plants with battery.

  • [US] UL1741/SB Cat.B-III: Supports the requirements of large-scale PV power plants and distribution networks in accordance with California Rule 21 and Hawaii Rule 14H. Used if the utility company does not specify a specific country data set.

120 / 208 V wye connection

L1, L2 and N

    Requirements for the electrical connection
    SPS IN signal cable requirements