19
EN
Notes regarding inverters with single and multiple
MPP trackers
Inverter with sin-
gle MPP tracker
Fronius Symo 3.0-3-S / 3.7-3-S / 4.5-3-S
Connecting one solar module field to an inverter with a
single MPP tracker
In the case of these inverters, there are
three terminals available for each DC+ and
DC-. The terminals are internally connected
and are not fused. This means that a maxi-
mum of three strings can be connected di-
rectly to the inverter in parallel.
In this case, the solar modules must be able
to carry at least the single reverse current
(for two strings) or twice the reverse current
(for three strings) (see data safety sheet for
solar module).
Where there are more than three strings, an
external combiner box with string fuses
must be used. In this case, the strings must
contain the same number of solar modules.
Inverter with mul-
tiple MPP track-
ers
Fronius Symo 3.0-3-M - 8.2-3-M
Connecting two solar module fields to an inverter with
multiple MPP trackers
In the case of inverters with multiple MPP
trackers, there are two independent DC in-
puts (MPP trackers) available. These can
be connected to an unequal number of so-
lar modules.
There are two terminals for DC+ available
per MPP tracker. In total there are four ter-
minals for DC-.
Connecting two to four strings in multiple
MPP tracker mode:
divide the strings between the two MPP tra-
cker inputs (DC+1/DC+2). The DC- termi-
nals can be used however you wish, as
they are internally connected.
When starting for the first time, set MPP
TRACKER 2 to "ON" (this can also be done
later in the Basic menu)
1
DC+
DC-1
DC+1
DC-
2
123
3
PV 1
Fronius Symo
3.0-3-S / 3.7-3-S / 4.5-3-S
1
DC+1
DC-1
PV 1PV 1
PV 2
DC+1
DC-2
DC+2
DC+2
DC-
1
1234
22
Fronius Symo 3.0-3-M - 8.2-3-M
To Next Page
Loading...
Need help?
General
