SMA SUNNY ISLAND 3.0M Operating Manual page 12

2 Security
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 for the battery type, nominal voltage and capacity parameters.
• Ensure that the values recommended by the battery manufacturer are set (refer to the technical data for 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 "Battery Management" technical information).
• Set the battery capacity for a ten-hour electric discharge (C10). The battery manufacturer specifies the battery
capacity in relation to discharge time.
Permanent damage to the battery due to improper handling
Improper set-up and 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 mounting location.
• Check and log the status of the battery 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.
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 performing maintenance work.
Performance impairment of batteries
Transition resistances can impair the performance of the batteries.
• Ensure that the torques at the battery connections are correct each time that maintenance is performed.
12 SI30M-44M-60H-80H-BE-en-32
SMA Solar Technology AG
Operating Manual