SMA Solar Technology AG
56 SB50US-80US-IUS094030 Installation Guide
5.7 DC Input Grounding
The Sunny Boy comes from the factory configured for negative ground systems. 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, move the fuse (1) and change the jumper position (2)
as shown in the following illustrations.
GFDI Fuse and Jumper Settings for Negative Ground
GFDI Fuse and Jumper Settings for Positive Ground
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