SMA America, LLC
Safety
Installation Guide
SB50US-80US-eng-IUS112633
13
Ground Fault Detection and Interruption in the PV Array
The Sunny Boy is equipped with grounding fault detection. If a ground fault current larger than 1 A is
flowing, the Sunny Boy switches off and displays the disturbance. As soon as the ground fault has
been located and eliminated, the ground fault disturbance must be rectified manually. Following this,
the Sunny Boy resumes operation.
PV Series Fusing
Series fusing may be required depending on the type of PV module used in the plant. See
National Electrical Code
®
690.9. For installation in Canada, the installation must be performed
according to the applicable Canadian standards.
Operating Temperature
The Sunny Boy delivers full performance in ambient temperatures up to +113 °F (+45 °C). Due to
the fan cooling, this level of performance can be achieved in closed rooms. The Sunny Boy does
remain operational above +113 °F (+45 °C), but it reduces the level of performance so as to protect
the internal component parts from overheating.
Interconnection Code Compliance
The Sunny Boy has been checked by the certification body and certified according to the guidelines
in UL 1741 Static Inverters and Charge Controllers for use in Photovoltaic Power Systems, IEEE 929-
2000 Recommended Practice for Utility Interface of Photovoltaic Systems, and IEEE 1547 Standard
for Interconnecting Distributed Resources with Electric Power Systems.
UL 1741 is the standard that is used for the Sunny Boy by the certification body, in
order to certify that it complies with the regulations in NEC and IEEE 929-2000.
IEEE 929-2000 states recommendations regarding the appropriate equipment and
functionality that is required to guarantee fault-free operation when the power
generation is connected to the power distribution grid.
The Sunny Boy is also certified according to C22.2 N0. 107.1-01 (General Use
Power Supplies).
FCC Compliance
The Sunny Boy has been tested and shown to conform with all FCC Part 15 A & B EMI/EMC
emissions regulations.
Prior to setting up and installing your PV plant, contact the on site grid operator or the
responsible authority.
