Electrical connection SMA America, LLC
48 SB30-40US-IUS103030 Installation Guide
6.7.2 DC input grounding
Negative grounding
The Sunny Boy comes from the factory configured for negative ground systems.
Positive grounding
Certain types of PV modules may require that the positive terminal be grounded instead of the
negative terminal. To configure the Sunny Boy for positive ground, refer to the following illustration:
1. Insert the fuse at position (1).
2. Move the jumper to position (2).
☑ DC input is configured for negative grounding.
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