SMA SI 3.0-11 Installation - Manual (Page 50)

7 Electrical Connection SMA Solar Technology AG
50 SI30M-44M-60H-80H-IA-en-30 Installation Manual
7.5 Connecting the Cables
7.5.1 Connecting the DC Power Cable
Additionally required material (not included in the scope of delivery):
☐ Ethanol
☐ 2 terminal lugs M8, 20 mm to 25 mm wide
Cable requirements:
☐ Conductor cross-section: 50 mm² to 95 mm²
☐ Cable diameter: 14 mm to 25 mm
Cable diameter when using a BatFuse: 14 mm to 21 mm
Procedure:
1. Ensure that the load-break switch of the BatFuse is open and secured against reconnection.
2. Loosen all screws on the enclosure lid and remove the enclosure lid. Retain the screws and conical spring washers
for later use.
3. Clean the contact surfaces of the DC+ and DC- connections with ethanol, for example. This reduces the transition
resistance on the contact surfaces. A low transition resistance increases the system stability and minimizes the risk of
damage to the Sunny Island.
4. Strip the DC+ cable and mount a terminal lug.
5. Attach two M32 cable glands with counter nuts to the DC+ and
DC − enclosure openings (torque: 12 Nm).
6. Lead the DC+ cable through the DC+ cable gland into the
Sunny Island.
:$51,1*
Danger to life due to incompatible lithium-ion battery
An incompatible lithium-ion battery can lead to a fire or an explosion. With incompatible lithium-ion batteries, it is not
ensured that the battery management will protect the battery.
• Ensure that the lithium-ion batteries are approved for use with the Sunny Island.
The list of lithium-ion batteries approved for the Sunny Island is updated regularly (see the Technical Information
"List of Approved Lithium-Ion Batteries" at www.SMA-Solar.com).
• If no lithium-ion batteries approved for the Sunny Island can be used, use lead-acid batteries.