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4. Connec ng Mul ple Cygnus Portable Solar Generators
4.1 Introduc on
It is possible to connect mul ple Cygnus units together using RJ45 data interlink cables and AC junc on boxes. There are two
possible configura ons:
Cygnus in Parallel
Either two or three units can be connected in parallel. In each case doubling or tripling the peak output and ba ery bank ca-‐
pacity whilst maintaining a single phase 230V AC output.
Connec ng three Cygnus units in parallel will mul ply the run- me approximately three mes compared with using a single
Cygnus with the same load. Connec ng mul ple units will mul ply the current available at the output. For example: connec ng
2 CYG500/1380/24 units with a peak capacity of 5.0kVA provides a total system output of 10.0kVA.
Cygnus in Series (3 Phase)
Units can be connected in series to provide a 415V three phase output. This requires that three units are connected
together using a junc on box (available separately from the manufacturer).
Parallel and series junc on boxes are only to be used for their specific role and are not
interchangeable.
Check with the manufacturer that the units are preconfigured for parallel or series use before
a emp ng connec on.
It is important that the D1, D2 & D3 data connec ons (Fig.4, D1-3) always have the caps or cable re-‐
taining rings secured. Failure to follow this procedure will cause water ingress damage and invalidate
the warranty.
Units which do not have the same model number prefix are not suitable for series or parallel connec-‐
on. For example: It is possible to connect two or three CYG5000/----/-- and it is not possible to con-‐
nect one CYG5000/----/-- to one CYG3500/----/--.
When connec ng in series or parallel, the so ware version of every unit must be the same. Otherwise
the units may not start.
Only use data cables supplied by the manufacturer.
Any interrup on of the data connec on will cause all units to power off.
4.2
Connec ng in Parallel
A parallel junc on box (available separately from the manufacturer) is required to connect the AC outputs of each unit.
1.
Either two or three units may be used.
2.
Turn off the power on all units using the Power On/Off switch (Fig. 1, C4).
3.
If using two units, Cygnus 1 should be set as open (Fig. 1, C3: rotate switch an -clockwise) and Cygnus 2 as Termi-‐
nated (Fig. 1, C3: rotate switch clockwise).
4.
If using three units, Cygnus 1 and Cygnus 2 should be set as Open (Fig. 1, C3: rotate switch an -clockwise) and
Cygnus 3 as Terminated (Fig. 1, C3: rotate switch clockwise).
5.
Star ng with Cygnus 1, unscrew the protec ve cover from D2 (Fig. 1, D2) on the control panel and connect the
first data interlink cable. Ensure that as the connector is plugged in, the connector's retaining ring is screwed
clockwise in to the receptacle on the panel connector. This ensures that water integrity is maintained.
Cygnus User Manual - v3.0 2011
Page 1 6
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