6 Electrical Connection
SMA Solar Technology AG
Operating manual
55
SI44M-80H-13-BE-en-15
1. On the Sunny Island, thread both insulated conductors through a ferrite included in the scope of delivery. (see
2. Connect one insulated conductor of the control cable to terminal
Ba
.
3. Connect one insulated conductor of the control cable to terminal
DigIn +
.
4. Connect terminal
BatVtgOut–
to terminal
DigIn –
. Use the same conductor as in the control cable.
6.6
Connecting the Cables
6.6.1
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 diameters: 14 mm to 25 mm
☐ Only copper cables may be used.
☐ The DC cables must be sized for the maximum battery voltage and the maximum battery current (see battery
manufacturer documentation).
WARNING
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 battery management is intrinsically safe and will protect the battery.
• Ensure that the lithium-ion batteries are approved for use with the Sunny Island (see technical information “List
of Approved Batteries” at www.SMA-Solar.com).
• If no lithium-ion batteries approved for the inverter can be used, lead-acid batteries can be used.
• Verify that the battery complies with locally applicable standards and directives and is intrinsically safe.
Procedure:
1. Ensure that the load-break switch of the battery fuse is open and secured against reconnection.
2. On the Sunny Island, remove all screws of the lower enclosure lid using an Allen key (AF 5) and remove the
enclosure lid. Retain the screws and conical spring washers for later use.
3. Attach 2 M32 cable glands with counter nuts included in the
scope of delivery to the
DC+
and
DC−
enclosure openings
(torque: 12 Nm).
2
1
4. Clean the contact surfaces of the connections
DC+
and
DC-
using a clean cloth and ethanol cleaning agent and
do not touch the contact surfaces after cleaning.
