SMA E-Panel installation manual
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MNX240 Autoformer
Continued:
The step-down transformer configuration will be the most common as it steps power down from the
240VAC inverter to make it accessible and useful for the 120VAC Sunny Island.
In this configuration, L1 and L2 (240VAC) power is applied to the 25Amp breakers of the MNX-240
Autotransformer. 120VAC is then available from the output to system neutral.
In the Step-Up autotransformer configuration, only L1 (120VAC) is connected to one of the 25Amp
breaker terminals and 240VAC power is available across both 25Amp breaker terminals. See
Fig. 4
.
