SMA SI 3324 Installation - Manual (Page 107)

SMA Technologie AG Battery Management
Installation Guide SI3324/4248-14:SE2406 Page 107
If the battery voltage does not recover within 30 minutes, then the Sunny Island
3324/4248 switches completely off. A complete switch-off can be recognized by the
fact that the DC circuit breaker is switched on but the display remains dark and no
voltage is present at the AC output terminals.
Once fully switched off, the Sunny Island 3324/4248 can only be manually restarted
(see section 9.5 "Restarting the Automatic Shutdown" (Page 86)).
For calculating the discharge mode limits, the current-voltage characteristics of lead
acid batteries are reproduced within the Sunny Island 3324/4248. The characteristic
curves calculated in this manner can be seen in the following figure.
You can use this graphic chart to determine the current state of your batteries:
1. Determine the voltage of your batteries (see "12-1 BattVoltage" parameter).
2. Read the battery current by selecting the "12-2 BatCurrent" parameter.
3. Reference this value ... A with respect to 100 Ah.
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