SMA SI 4548-US - Manual (Page 128)

14 Connecting External Sources SMA America, LLC
128 SI4548-6048-US-BE-en-20 Operating Manual
14.1.9 Stopping the Generator
If the generator was started via the Sunny Island (automatically or manually), it can be manually
stopped at any time using the parameter "540.01 GnManStr". This disconnects the generator (the
minimum run time is not taken into account here) and the power-down time (Cool) is skipped.
Afterwards, the system enters the stop time (Lock).
14.1.10 Stopping the Sunny Island
If the Sunny Island is stopped by the user, the generator is immediately disconnected. The generator
is then stopped (generator request, GnReq, is disabled). The power down time (Cool) is skipped and
the system enters the stop time.
14.1.11 Disturbances
Reverse power
If the reverse power (parameter "234.13 GnRvPwr") set for the time "234.14 GnRvTm" is exceeded,
the generator is disconnected and stopped. The power-down time (Cool, parameter
"234.10 GnCoolTm") is skipped and the system transitions into the minimum stop time (Lock). After
reverse power, connection is blocked for at least "231.03 ExtLkTm" or "234.09 GnStpTmMin".
Electric shock through residual voltage in the off-grid system due to generator shut-off
delays
Death or serious injuries. The power-down times depend on the generator type. During the follow-up
time, there is still grid voltage at the loads.
• Wait until there is no voltage on the generator.
• Measure voltage to ensure that none is present in the system.
Generators with manual start option
Generators with the "manual" start option can generally only be started and stopped at the
generator.
Generator start prevented
If the generator start is to be disabled after a manual stop, this must be performed by setting the
parameter "235.01 GnAutoEna" to "Off".
Generator can be operating while Sunny Island is stopped
If the generator is started directly at the generator management box or the generator, it can only
be stopped there again. Stopping the Sunny Island here only disconnects the generator and the
system transitions into the stop time (Lock).