SMA America, LLC
Additional Functions
Technical Description
SI5048U-TUS121440
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• The battery state of charge during the t2 interval, the recognition of which will lead to the load-
shedding function being started: Parameter ”242.03 Lod1SocTm2Str”.
• The battery state of charge during the t2 interval, the recognition of which will lead to the load-
shedding function being stopped: Parameter ”242.04 Lod1SocTm2Stp”.
12.2 Sleep Mode
Using the ”250.10 SleepEna” parameter set to ”Enable” allows the sleep mode to be activated in
single-phase grids, which the master uses to switch off the slaves when the power value allows this.
12.3 Time-Controlled Operation
The Sunny Island can be operated in a time-controlled manner using a timer function (like a clock
timer), supplying power at a planned point in time.
To do this, this function must be activated by using the ”510.02 InvTmOpEna” parameter. With the
”510.03 InvTmOpStrDt” parameter you can specify the starting date, and with the
”510.04 InvTmStrTm” you specify the starting time. With the parameter ”510.05 InvTmOpRnDur”
you set the running time and with the parameter ”510.06 InvTmOpCyc” you determine whether this
function will be carried out once, or every day or week, at, or starting at, the specified start time (date
and time).
12.4 Overload and Short-Circuit Behavior
The Sunny Island can be temporarily operated under overload conditions. It can also supply short-
circuit currents.
In case of overload, the Sunny Island supplies an output of 6 500 W for 30 minutes and can supply
7 200 W for 5 minutes. The device can even supply 8 400 W of output power for one minute.
If a short-circuit occurs, the Sunny Island provides current of max. 180 A (for 60 ms). This is sufficient
to trigger commercial 20 A circuit breakers.
12.5 Device Faults and Autostart
If a critical fault occurs, the Sunny Island automatically shuts down and displays the reason on the
display. If the autostart function is activated
(”250.01 AutoStr” parameter)
the Sunny Island can
confirm the failure automatically and restart on its own. If the failure persists the Sunny Island cannot
be started.
Sleep Mode
The ”Sleep Mode” works exclusively in off-grid operation! The values for connection and
disconnection of the Sunny Island are already set at the factory (optimized in terms of
efficiency).
Automatic Start Counter
If the autostart counter has counted down to 0, the Sunny Island waits for 10 minutes
before attempting to restart automatically.
