Connection variants on multi-MPP tracker invert-
ers
General In the case of inverters with multiple MPP trackers like the Fronius Symo Ad-
vanced –M, there are 2 independent DC inputs (MPP trackers) available. These
two MPP trackers can be wired with a different number of modules.
IMPORTANT! The number of PV modules per MPP tracker per string connection
should be the same.
There are 3 terminals for DC+ per MPP tracker. In total there are six terminals
for DC-.
In the case of inverters with single MPP trackers like the Fronius Eco, there is 1
DC input (MPP tracker) available. The number of PV modules per string connec-
tion should be the same. For the MPP tracker, there are 6 terminals for DC+ and
6 terminals for DC-.
Multi MPP
Tracker
Multi MPP tracker mode on both MPP tracker inputs:
PV 1
1
DC+1 DC+2
DC-
2
1 2 3 4 5 6
3 1 2
+1 +2
PV 1
PV 2
DC-1
DC+1
DC-2
DC+2
* I
DC NENN
/ MPP
3
Connecting two solar module fields to an inverter with multiple MPP trackers
MPP tracker Input current
DC input
Symo Advanced ROW
10-12
Symo Advanced ROW
15-20
If an AFCI (AFPE) according to IEC63027 is prescribed in your installation,
an input current per string of maximum 12 A is permitted.
MPP1
27 A (I
DC NOMINAL
) 33 A (I
DC NOMINAL
)
DC+1
MPP2 16.5 A (I
DC NOMINAL
)
14 A (I
DC NOMINAL
) if
< 420 V
DC
27 A (I
DC NOMINAL
)
DC+2
Divide the solar module strings between the two MPP tracker inputs (DC+1 and
DC+2). The DC- terminals can be used however you wish, as they are internally
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