14 Connecting External Sources SMA America, LLC
122 SI4548_6048-US-TB_en-13 Technical description
Generator Interface "234.07 GnStrMod" = Autostart; Start at the Generator
14.1.5 Automatic Generator Operation
In automatic operating mode ("235.01 GnAutoEna" parameter), the Sunny Island automatically
defines the settings (depending on battery state of charge or load) as to when the generator starts
and how long it runs. The automatic operating mode is activated using GnAutoEna = On (default).
If GnAutoEna = Off, the automatic operating mode is deactivated.
In addition, the user can also manually start and stop the generator, if required.
The time periods t1 and t2 are defined using the "235.07 GnTm1Str" and "235.08 GnTm2Str"
parameters. The start time for t1 (and thus the end of t2) is defined using GnTm1Str, and the start time
for t2 (end of t1) is defined using GnTm2Str.
1 Manual generator start
2 "Generator is running" detected, beginning of warm up phase
3 Warm-up phase completed
4 Generator is connected
5 Generator current limit
6 Current is reduced, battery absorption phase
7 Manual generator stop, disconnection of the generator
8 Generator is disconnected, beginning of stop time
9 End of stop time
* Transfer relay
Charge-state-dependent start
The Sunny Island changes to the operating mode "Stop/Lock" when stopped manually during
automatic operation.
•Manual inputs on the Sunny Island have a higher priority than automatic operation.
• If the Sunny Island is manually stopped while the automatic operating mode is activated,
it switches to stop/lock operating mode.
• If Generator Automatic Start is activated and the conditions for automatic operation are
met, the Sunny Island changes back into the Start operating mode after lock time
(or manual acknowledgment with the "540.02 GnAck" parameter).
GnTm1Str = GnTm2Str
If GnTm1Str = GnTm2Str, only t1 is activated!
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