Installation Instructions - KACO new energy, Inc.

Installing the Inverter
Authorised electrician
7.3.2.3 Recommended standard connection
Equal MPP voltages must be applied to input 1 and 2, as well as inputs 3 and 4. The MPP voltages of the two DC
paths can be different. They are tracked by separate, independently operating MPP trackers (MPP trackers A and B).
(n 1
=n 2
, n 3
=n 4
).
Electrical data for standard connection
Connection of the DC inputs Number of modules per string n 1
=n 2
, n 3
=n 4
P max
I max
per string < 6 kW
MPP trackers A+B together < 12 kW
< 18.6 A per tracker
MPP tracker A
MPP tracker B
U MPP
= 350 - 800 V
U MPP
= 350 - 800 V
n 1
= n 2
n 3
= n 4
Figure 8: Recommended standard connection
7.3.2.4 Parallel input connection
The DC inputs can also be connected in parallel. Only strings with identical MPP voltage can be connected in
parallel (n 1
=n 2
=n m
).
The maximum input current rises to 37.2 A for parallel connection.
In case of a parallel input connection, MPP trackers A and B must be bridged. If input 1 is connected to input 2 and
input 3 is connected to input 4, then there is no parallel operation and the maximum input current continues to be
18.6 A. Parallel operation is automatically recognized by the inverter.
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