Connecting External Sources; Generator; Generator Start Options - SMA Sunny Island 5048 Installation Instructions Manual

SMA
Technologie AG

14 Connecting External Sources

The Sunny Island 5048 supports the integration of external energy sources. Here a
distinction is made between the integration of a generator and the integration of the
public grid.
Both the generator as well as the public grid are integrated through the AC2 connection
of the Sunny Island 5048. A 1-phase and 3-phase connection can be established.
During 1-phase operation, the transfer relays are operated at the same time which
allows a correspondingly larger current to be employed and therefore allows a
correspondingly larger quantity of generator or grid connections.
When installing 1-phase parallel systems, the connection cables for AC1 and AC2
for all Sunny Island 5048 devices must have the same cable cross-sections and
cable lengths.
In the parameter settings and display values, a distinction is made between purely
generator- and purely grid-relevant settings and values as well as common settings and
values (EXT) for the grid and generator. The Sunny Island 5048 has separate
parameters for the grid and generator. This generally allows both operating modes to
be used without making additional adjustments.

14.1 Generator

Depending on the battery charge state or the consumer power, the Sunny Island 5048
can start a generator and of course stop it again as well. In this case, diverse limits and
times are taken into consideration (see limits and power flow controller).

14.1.1 Generator Start Options

The Sunny Island 5048 supports the following options for the generator start that can
be adjusted using the "#242.07 GnStrMod" parameter in standby mode:
• Manual
• Autostart
• GenMan
Manual
This setting is for generators that do not have an electrical remote starting option and,
for example, are started using cable winches, cranks, among other things.
In this case, the Sunny Island 5048 has no option to start the generator. It only monitors
the generator input (AC2). If, while monitoring the input, the device detects that the
generator voltage and frequency are within the set limits (see 14.1.5 "Limits and Power
Adjustment" (Page 105)), the device is synchronized and switches on following the
warm up time.
Technical Description
Connecting External Sources
SI5048-11:EE4206 Page 95