6 Electrical Connection
SMA Solar Technology AG
Operating manual
SI44M-80H-13-BE-en-15
52
Procedure:
1.
WARNING
Danger to life from electric shock due to incorrect insulation
In the case of faulty insulation, supposedly de-energized parts or cables may be live. Touching live components
or cables can result in death or serious injury due to electric shock.
• When making the following connections, always insert a silicone tube (see Section 6.6.5, page 60).
2. Connect the control cable on the Sunny Island to either multifunction relay
Relay1
or
Relay2
. Use the
C
and
NO
connections.
3. Enter the selected configuration in the table with the settings for the multifunction relays (see Section 7.10.2,
6.5.15 Connecting the Battery Room Fan
If the charging current leads to the emission of gases from the battery, the battery room fan is switched on by the
Sunny Island for at least one hour.
Requirements:
☐ The technical requirements of the multifunction relay must be met (see Section 16, page 175).
Cable requirements:
☐ Conductor type: copper wire
☐ Conductor cross-section: 0.2 mm² to 2.5 mm²
Procedure:
The battery management of the Sunny Island inverter is able to control one battery room fan for each battery. The
following options result for the connection:
• Control a separate battery room fan for each battery.
• Control one battery room fan for all batteries. This is only an option with multicluster systems.
Controlling a separate battery room fan for each battery
1. Ensure that the battery room is sufficiently ventilated in the case of a malfunction of the multifunction relay.
2.
WARNING
Danger to life from electric shock due to incorrect insulation
In the case of faulty insulation, supposedly de-energized parts or cables may be live. Touching live components
or cables can result in death or serious injury due to electric shock.
• When making the following connections, always insert a silicone tube (see Section 6.6.5, page 60).
3. With single systems or single-cluster systems, connect the battery room fan to a multifunction relay.
4. With a multi-cluster system, in each cluster, connect one battery room fan on one Sunny Island to any multifunction
relay.
5. Enter the configuration
Battery fan
in the table of settings (see Section 7.10.2, page 102).
Controlling One Battery Room Fan For All Batteries
1. Ensure that the battery room is sufficiently ventilated in the case of a malfunction of the multifunction relay.
