Sunny Boy 2500U
Installation and Operator’s Manual
SB2500U-11:NE
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13
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SMA Regelsysteme GmbH
WARNING:
All electrical installations shall be done in accordance with all
local electrical codes and the National Electrical Code (NEC), ANSI/NFPA
70. Use no. 14 AWG, minimum 90 °C (194 °F), copper wire for all connec-
tions with the Sunny Boy. Voltage drop and other considerations may dic-
tate that larger wire sizes be used.
The AC-grid and the input from the DC disconnect enclosure are connected to the
inverter inside the case. Cables with wire sizes up to 10 AWG (5.26 mm
2
) are ac-
cepted by the AC- and DC-terminals on the printed circuit board.
WARNING:
The connection of the Sunny Boy to the DC-voltage from the
PV string and the AC-voltage of the utility must be done in the order de-
scribed here. This ensures that the disconnecting of contacts as well as
hazardous voltages during the installation are avoided.
•
Connect the Sunny Boy to the electricity grid
•
Connect the PV strings to the DC disconnect enclosure
•
Connect the DC disconnect enclosure to the Sunny Boy
•
Connect the utility by switching all breakers ON
To disconnect the Sunny Boy from the system, first turn all breakers and switches
OFF. Then disconnect the various conductors in the reverse order listed above.
