Permitted grid configurations

The inverter approved for operation in the following utility grids:

• TN-C

• TN-S

• TN-C-S

• TT¹⁾

• Delta IT

¹⁾ It must be ensured that the local grounding has a sufficiently low-impedance connection to the grounding of the transformer, otherwise operational leakage currents can lead to potential differences. For error-free operation, the ground potential at the neutral point of the transformer must be the same as that of the grounding conductor connection on the inverter. SMA Solar Technology AG recommends a bridge between N and grounding conductor at the point of interconnection to ensure error-free operation. Improper implementation of the transformer/grid connection with regard to low-impedance grounding/zeroing of the neutral point can lead to a device defect that is not covered by the warranty.