Wiring the Sunny Boy Sequence of Connecting
5-2 SMA America SB3000US-4000US-11-SE1607
Sequence of Connecting
Wiring without SMA DC-Disconnect
WARNING: Always connect the wires to the Sunny
Boy in the following sequence:
1. De-energize all energy sources by opening all AC and DC disconnects and/or
breakers .
2. Wiring from AC breaker to the AC disconnect switch.
3. Wiring from the AC disconnect switch to the Sunny Boy, follow the procedure
on page 5-10 et seq..
4. Wiring from the PV array to the DC disconnect.
5. Wiring from the DC disconnect to the Sunny Boy, follow the procedure on
page 5-19 et seq..
6. Turn the DC switches and/or breakers ON.
7. Turn the AC switches and/or breakers ON.
To disconnect the Sunny Boy first turn OFF all AC disconnects and then all DC
disconnects. The AC system should always be disconnected before the DC system.
After the Sunny Boy is de-energized, disconnect the wiring in the reverse order from
above.
WARNING: Always wait a minimum of 5 minutes
for stored potentials in the Sunny Boy to discharge
completely before opening the enclosure.
WARNING: All electrical installations must be done
in accordance with all local electrical codes and the
National Electrical Code (NEC), ANSI/NFPA 70.
WARNING: Before connecting the Sunny Boy to
the electrical utility grid, contact the local utility com-
pany. This connection must be made only by quali-
fied personnel.
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