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5 Planning the installation
Planning the connection of the solar modules (DC)
5.5.3 Arrangement of the DC inputs on the DC
connection panel
The inverter has 6 DC inputs (DC1 to DC6), each with 2 DC
connections. Up to 12 module strings can be connected to the
inverter. Each DC input has its own MPP tracker.
DC1-1
DC 1
DC 1
DC2-1
DC 2
DC 2
DC3-1
DC 3
DC 3
DC4-1
DC 4
DC 4
DC5-1
DC 5
DC 5
DC 6
DC 6
DC6-1
1
1
Fig. 5.23:
Arrangement of the DC inputs on the DC connection
panel
42
DC1-2
DC2-2
DC3-2
DC4-2
DC5-2
DC6-2
2
2
Installation and Operation Manual M50A_260 RPI503M260000 Product version L and M EU V1.3 EN 2023-08-14
5.5.4 Functioning of integrated string monitoring
The string is monitored via current sensors. Fig. 5.24 shows the
distribution of the current sensors to the module strings of a DC
input.
A
I
1
CT 1
DC x
1
Fig. 5.24:
Arrangement of the current sensors of a DC input
DC connection 1 has a current sensor (CT 1). Current sensor
CT 2 measures the sum current of the two module strings. The
current in module string 2 is calculated by the difference: I
- I
.
1
A
I
ges
CT 2
I
2
2
= I
2
ges
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