SMA SUNNY ISLAND 4.4M Operating Manual page 136

13 Cleaning and Maintenance
Risk of burns due to hot battery components
Improper battery connection may result in excessively high transition resistances. Excessive transition resistances
give rise to localized heat build-up.
• Ensure that all pole connectors are connected with the connecting torque specified by the battery
manufacturer.
• Ensure that all DC cables are connected with the connecting torque specified by the battery manufacturer.
Damage to the battery due to incorrect settings
The set battery parameters influence the charging behavior of the Sunny Island inverter. The battery can be
damaged by incorrect settings of the battery type, nominal voltage and capacity parameters.
• Ensure that the values recommended by the manufacturer are set for the battery (refer to the technical data of
the battery in the manufacturer documentation). Note that the battery charging behavior names used by
SMA Solar Technology AG and the battery manufacturer may, in some cases, differ in meaning (for the battery
charging behavior of the Sunny Island inverter, see technical information "List of Approved Batteries").
• Set the battery capacity for a ten-hour electric discharge (C10). The battery manufacturer specifies the battery
capacity in relation to discharge time.
Procedure:
1. Stop the system and switch off the Sunny Island (see Section 9, page 118).
2. Ensure that the battery is not grounded unintentionally.
3. If the battery is unintentionally grounded, identify the connection between the battery and ground potential and
remove the unintentional connection. This helps to prevent electric shock caused by malfunction of other system
devices.
4. Open the load-break switch of the battery fuse and secure against reconnection.
5. Remove the battery to be replaced (see battery manufacturer's manuals).
6. Mount and connect the new battery (see manuals of the battery manufacturer). The battery must comply with the
technical requirements of the Sunny Island inverter (refer to the Sunny Island inverter installation manual for
technical data of the DC connection).
7. Quickly close the load-break switch of the battery fuse and close the battery fuse (see battery fuse
documentation).
8. Switch the Sunny Island on (see Section 9.1, page 118).
9. Activate the user interface of the inverter (see Section 8.1, page 104).
10. Log in as Installer (see Section 8.2, page 107).
11. Start the installation assistant.
12. Click on [Save and next] for each step up to the step Battery configuration.
13. Select the button [New battery configuration].
14. Set the parameter Type to the battery type used.
15. Only for lead-acid batteries: Set the Voltage parameter to the battery voltage and set the Nominal capacity
parameter to C10 nominal capacity of the battery (see Section 8.12.1, page 116).
16. Select [Save and next] until the installation assistant closes.
136 SI44M-80H-13-BE-en-15
CAUTION
NOTICE
SMA Solar Technology AG
Operating manual