Fronius Symo 10-20 kW - Manual (Page 17)

15
EN
Notes regarding inverters with multiple MPP track-
ers
Inverter with mul-
tiple MPP track-
ers
Connecting two solar module fields to an inverter with
multiple MPP trackers
In the case of inverters with multiple MPP
trackers, there are 2 independent DC inputs
(MPP trackers) available. These can be
connected to an unequal number of solar
modules.
There are 3 terminals for DC+ available per
MPP tracker. In total there are 6 terminals
for DC-.
Connecting 2-6 strings in multiple MPP tra-
cker 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 up for the first time, set MPP
TRACKER 2 to "ON" (this will also later be
possible from the Basic menu)
Connecting multiple interconnected solar module
fields to an inverter with multiple MPP trackers using
one lead
Single MPP tracker mode on an inverter
with multiple MPP trackers:
If the strings are connected using a string
collection box and only one bus is used for
connection to the inverter, the connection
DC+1 (pin 2) and DC+2 (pin 1) must be
jumpered.
The wire diameter of the DC connection
lead and the jumpering must be the same.
Jumpering of the DC terminal is not neces-
sary, as these terminals are jumpered inter-
nally.
When starting up for the first time, set MPP
TRACKER 2 to "OFF" (this will also later be
possible from the Basic menu)
If the inverter with multiple MPP trackers is
operated in single MPP tracker mode, the
currents from the DC leads connected are
divided evenly across both inputs.
1
DC+1
DC-1
PV 1 PV 1
PV 2
DC+1
DC-2
DC+2
DC+2 DC-
2
1 2 3
3
4 5 6
1 2 3
DC-1
DC+1
PV 1
PV 2
D1 D1
=
*
*
1
DC+1 DC+2 DC-
2
1 2 3
3
4 5 6
1 2 3
max. 33 A