Optional Connections; Voltage Sense; Temperature Sensor; Can Bus Interface - Victron energy BlueSolar MPPT 150/70 User Manual

Solar array Solar array
MPP-voltage MPP-current
[V] [A]
18 Max 50A
36 27
54 18
72 13
90 11
108 9
Solar array Solar array
MPP-voltage MPP-current
[V] [A]
36
Max 50A
54
37
72
28
90
22
108
19
Solar array Solar array
MPP-voltage MPP-current
[V] [A]
54 Max 50A
72 42
90 33
108 28
Solar array Solar array
MPP-voltage MPP-current
[V] [A]
72 Max 50A
90 44
108 37
Table 2: PV cable cross section and power loss

3.4 Optional connections

3.4.1 Voltage Sense

For compensating possible cable losses during charging, two sense wires can be connected to
measure voltage directly on the battery. Use wire with a cross-section of 0,75mm² and insert a 0,1
Amp fuse close to the battery.
During battery charging, the charger will compensate the voltage drop over the DC cables up to a
maximum of 1 Volt (i.e. 1V over the positive connection and 1V over the negative connection). If the
voltage drop threatens to become larger than 1V, the charging current is limited in such a way that the
voltage drop remains limited to 1V.
The warning triangle on the LCD will blink if the voltage drop reaches 1 Volt
3.4.2 Temperature Sensor (see figure 1)
The temperature sensor supplied with the product may be used for temperature-compensated
charging. The sensor is isolated and must be mounted on the battery minus pole.

3.4.3 CAN bus interface

The charger is equipped with two CAN bus RJ45 sockets.
4
12V system (solar array up to 1000W)
Power loss
Length 2x5 meter
in PV cables
2
mm
α
(%)
Not recommended
1 16
1 10
0,75 6
0,5 6
0,5 4
24V system (solar array up to 2000W)
Power loss
Length 2x5 meter
in PV cables
2
mm
α
%
35
1
16
1
0,75 10
0,5 10
0,5 6
36V system (solar array up to 3000W)
Power loss
Length 2x5 meter
in PV cables
2
mm
α
%
25
1
0,75 16
0,5 16
0,5 10
48V system (solar array up to 4000W)
Power loss
Length 2x5 meter
in PV cables
2
mm
α
%
16
1
1 10
0,75 10
Length 2x10 meter
2
AWG mm AWG
Not recommended
5 35 2
7 16 5
10 10 7
10 10 7
11 6 10
Length 2x10 meter
2
AWG mm AWG
2 Not recommended
5 25 3
7 25 3
7 25 3
10 16 5
Length 2x10 meter
2
AWG mm AWG
3 35 2
5 25 3
5 25 3
7 25 3
Length 2x10 meter
2
AWG mm AWG
5 35 2
7 25 3
7 16 5
Length 2x20 meter
2
mm AWG
Not recommended
Not recommended
25 3
25 3
16 5
16 5
Length 2x20 meter
2
mm AWG
Not recommended
Not recommended
35 2
35 2
25 3
Length 2x20 meter
2
mm AWG
Not recommended
Not recommended
35 2
35 2
Length 2x20 meter
2
mm AWG
Not recommended
35 2
35 2