SMA SUNNY ISLAND 4.4M Operating Manual page 60

6 Electrical Connection
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. 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.
4. Strip off the insulation of the DC+ cable and mount a terminal lug.
5. Attach two M32 cable glands with counter nuts included in the
scope of delivery to the DC+ and DC− enclosure openings
(torque: 12 Nm).
6. Lead the DC+ cable through the DC+ cable gland into the
Sunny Island.
60 SI44M-80H-12-BE-en-10
SMA Solar Technology AG
Operating Manual