SMA SUNNY ISLAND 5048-US, Техническое описание

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SMA America, LLC PV Inverter
Technical Description SI5048U-TUS121440 145
17 PV Inverter
The following section provides information for connecting and configuring the Sunny Boy inverter in
off-grid power systems.
The Sunny Island along with the Sunny Boy inverters are optimized to work in backup (grid-tied) as
well as in off-grid applications.
This section describes the parameter setting of the Sunny Boy for both kinds of application. In backup
operation, the ”Default” parameter has to be set to ”UL 1741”. In operation in parallel with the grid,
the Sunny Island automatically detects a grid failure and sets the Sunny Boy inverters automatically
to ”Off-Grid” mode. To set up this arrangement, the Sunny Island and the Sunny Boy have to be
connected with a communication cable and the parameters of the Sunny Boy inverters has to be set
according to this documentation. In case the grid returns, the Sunny Island switches back to grid-tied
mode according to ”UL 1741”.
17.1 Connection to the Off-Grid Power System
(Protected Loads Panel)
• Connect the Sunny Boy inverter to the grid in accordance with the Sunny Boy installation guide.
• Connect the AC distribution sub-panel to the AC1 terminals of the Sunny Island. This distribution
sub-panel is where the PV inverter will be connected as well.
• You must set the corresponding parameters in the Sunny Boy to suit an off-grid power system so
that it works properly together with the Sunny Island. The required values for these settings are
described in the next section.
WARNING
Danger to life due to high voltages in the Sunny Island. Risk of death or serious injury due
to electric shock.
• Ensure that the entire connection area of the Sunny Island 5048U is free of voltage
before installing the Sunny Boy inverter. Refer to Section 3 ”Safety Instructions”
(page 27).