SMA SI 3.0-11 Installation - Manual (Page 46)

7 Electrical Connection SMA Solar Technology AG
46 SI30M-44M-60H-80H-IA-en-30 Installation Manual
7.4.15 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 10 "Technical Data", page 94).
Cable requirements:
☐ 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. :$51,1*
Danger to life from electric shock due to incorrect insulation
• With single systems or single-cluster systems:
• Connect the battery room fan to a multifunction relay
(see Section 7.5.5 "Connecting Relay 1 and Relay 2",
page 55).
• Go to Section 8.1.5, page 66 and enter BatFan in the table for configuration.
• With a multicluster system:
• In each cluster, connect one battery room fan on one Sunny Island to any multifunction relay
(see Section 7.5.5 "Connecting Relay 1 and Relay 2", page 55).
• Go to Section 8.1.5, page 66 and enter BatFan in the table for configuration.