SMA SUNNY BOY 4000-US - 8 Contact; SMA Solar Technology America, LLC; SMA Solar Technology Canada Inc.

SMA America, LLC Electrical connection
Installation Guide SB30-40US-IUS103030 35
AC Grounding DC Disconnect
The Sunny Boy must be connected to the AC grouDC Disconnectnd from the utility via the ground
terminal (PE) (see 4.2”Locating internal components” (page18)).
PV grounding
The PV array (frame) ground should be connected to the grounding electrode terminal (see
4.2”Locating internal components” (page18)). The size for the conductor is usually based on the
size of the largest conductor in the DC system.
DC grounding electrode conductor
A DC grounding electrode conductor may be required by the Authority Having Jurisdiction (AHJ). Use
the PV grounding and DC grounding electrode conductor (see 4.2”Locating internal components”
(page18)).
6.1 Without SMA DC Disconnect
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 40 et
seq.
4. Wiring from the PV wires to the DC disconnect.
5. Wiring from the DC disconnect to the Sunny Boy, follow the procedure on page 40 et seq.
6. Turn the DC switches and/or breakers on.
7. Turn the AC switches and/or breakers on.
6.2 With SMA DC Disconnect
1. De-energize all energy sources by opening all AC and DC disconnects and/or breakers .
2. Wiring from the AC breaker to the SMA DC Disconnect, follow the procedure on page 38 et
seq.
3. AC wiring from the SMA DC Disconnect to the Sunny Boy, follow the procedure on page 41 et
seq.
4. Wiring from the PV array to the SMA DC Disconnect, follow the procedure on page 50 et seq.
5. DC wiring from the SMA DC Disconnect to the Sunny Boy, follow the procedure on page 50 et
seq.
6. Switch the SMA DC Disconnect to position "1".
Disconnecting the Sunny Boy
• First turn off all AC disconnects and then all DC disconnects.
• The AC side must always be disconnected before the DC side.
• After the Sunny Boy is de-energized, disconnect the wiring in the reverse order from
above.