SMA SUNNY ISLAND 4.4M Operating Manual page 69

SMA Solar Technology AG
Test point
Connection of additional grounding
Grounding conductor connection to
ground
Connecting the Sunny Island Inverter
Test point
Enclosure opening for DC
DC connection
DC power cable
Battery fuse
If installed, battery current sensor
Checking Connections AC1 and AC2 of the Sunny Island Inverter
Test point
Enclosure openings AC1 and AC2
AC1 and AC2 terminals
Operating Manual
Test criterion
Hexagon socket screw is screwed tight (torque: 4 Nm to 5.7 Nm).
The grounding conductors must be grounded, e.g., by connection to a
grounding busbar or foundation ground electrode.
Test criterion
In the cable gland M32, the diameter of the DC power cable must be
14 mm to 25 mm.
Terminal lugs are pressed on firmly.
The bolted connection for fitting terminal lugs to the DC connection is
assembled as follows: head of M8x20 screw | spring washer |
fender washer | terminal lug | DC connection.
Terminal lugs are firmly fastened on the Sunny Island (torque: 12 Nm).
The maximum length of the cables from the battery via the battery fuse
to the Sunny Island is 10 m.
The conductor cross-section meets the cable requirements of 50 mm²
to 95 mm² (for the recommended conductor cross-section, see Sec-
tion 7.4.1).
Fuse links are matched to the Sunny Island.
• SI4.4M-12: 100 A
• SI6.0H-12: 160 A
• SI8.0H-12: 200 A
The cables connected to the battery fuse are tightened with the speci-
fied torque (see manufacturer documentation).
The battery current sensor can be loaded with the maximum DC cur-
rent (see technical data of the battery current sensor).
Test criterion
All enclosure openings are sealed with M25 cable glands or filler
plugs.
For an M25 cable gland, the cable diameter must be 9 mm to 18 mm.
All contact areas are not insulated.
All terminal levers are in the downward position.
All cables are securely clamped.
6 Electrical Connection
SI44M-80H-12-BE-en-10
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