Safety
SMA America, LLC
14
SB20_25_30HFUS-eng-IUS113711
Installation Guide
PV ground fault detection and interruption
The Sunny Boy is equipped with a ground fault detection device. If a ground fault current greater than
1 Amp is detected, the Sunny Boy will shut down and display the fault condition on the user interface
display. Once the ground fault is located and corrected, the ground fault error will need to be
manually cleared and the inverter will then resume normal operation.
PV series fusing
Series fusing may be required depending on the type of PV module used in the system.
See
National Electrical Code
®
690.9
Interconnection code compliance
The Sunny Boy has been tested and listed by Underwriters Laboratories to meet the requirements of
UL1741 Static Inverters and Charge Controllers for use in Photovoltaic Power Systems, as well as
IEEE-929-2000 Recommended Practice for Utility Interface of Photovoltaic Systems and IEEE 1547
Standard for Interconnecting Distributed Resources with Electric Power Systems.
UL1741 is the standard applied by Underwriters Laboratories to the Sunny Boy to certify that it meets
the requirements of the NEC and IEEE-929-2000. IEEE 929-2000 provides recommendations
regarding the proper equipment and functionality necessary to ensure compatible operation when
power generation is connected to the utility grid.
The Sunny Boy is also certified to C22.2 No 107.1-01 (General Use Power Supplies).
Operating temperature
The Sunny Boy has been designed to maintain full power output at ambient temperatures as high as
+113 °F (+45 °C). Fan cooling allows this level of output power to be achieved even in enclosed
spaces. The Sunny Boy will continue to operate well 113 °F (+45 °C) and derates as
needed to maintain a safe internal component temperature.
Contact the local utility and/or the authority having jurisdiction prior to connecting the
Sunny Boy to the power distribution grid.
