SMA SUNNY ISLAND 3.0M Installation Manual page 12

2 Safety
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. Heat build-up can cause burns.
• 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.
Permanent damage to the battery due to improper handling
Improper storage, transport, set-up or maintenance of the battery can cause it to become permanently damaged.
Logs can help to determine the cause.
• Comply with all requirements of the battery manufacturer with regard to storage, transport and mounting location.
• Check and log the status of the battery before commissioning and before performing maintenance work:
• Check the battery for visible damage and log.
• Measure and log the fill level and acid density of FLA batteries.
• In the case of lead-acid batteries, measure and log the voltages of the individual cells.
• Perform and log the test routines required by the battery manufacturer.
Tip: Many battery manufacturers provide suitable logs.
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 battery manufacturer are set (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 "Battery Management").
• Set the battery capacity for a ten-hour electric discharge (C10) The battery manufacturer specifies the battery
capacity in relation to discharge time.
Prior damage to batteries
Batteries may have suffered prior damage due to production defects. Logs can help to determine the cause.
• Check and log the status of the battery before commissioning and each time before performing maintenance
work:
Performance impairment of batteries
Transition resistances can impair the performance of the batteries.
• Note the torques when connecting the battery.
12 SI30M-44M-60H-80H-IA-en-32
SMA Solar Technology AG
Installation manual