Connecting External Sources
SMA America, LLC
118
SI5048U-TUS121440
Technical Description
The following figure shows the wiring for a generator capable of autostart:
If the generator is started manually in this operating mode, the Sunny Island detects the running
generator and connects it once the warm-up time has expired. If the generator is externally stopped,
this is detected, the generator is disconnected and the off-grid power system is continued to be
supplied.
14.1.3 Generator Operation
The Sunny Island allows automatic operation (depending on charge state or load) (see section
14.1.5 ”Automatic Generator Operation” (page 120)). In addition, manual operation is also
possible.
14.1.4 Manual Generator Operation
The manual operating modes for the generator management are triggered using the ”540.01
GnManStr” parameter. The following operating modes are distinguished:
Generator Request
If the generator is running after being externally started and a generator request occurs,
the GnReq signal is disabled until the generator is externally stopped again and the stop
time has expired.
Auto:
In this operating mode, the generator is automatically started due to the settings. This
includes the start via the state of charge or the consumer power or by the request for
a manual equalization charge.
(”520.01 ChrgSelMan” = Start).
Stop:
The generator is manually stopped. The current generator request is canceled –
immediate disconnection from generator and change to lock state. Once the lockout
time has ended, the generator switches into automatic operation.
