Pv Connection; 12V System (Solar Array Up To 1000W); 24V System (Solar Array Up To 2000W); 36V System (Solar Array Up To 3000W) - Victron energy BlueSolar MPPT 150/70 User Manual
Charge controller
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Also See for BlueSolar MPPT 150/70:
- Manual (146 pages) ,
- Owner's manual (154 pages) ,
- Manual (89 pages)
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Table 1 below gives some examples of battery cable cross sections calculated with formula (5).
(in this case I and V in formula (5) are the output current and output voltage of the charge controller)
Maximum
Maximum
solar array
Charge current
output
@13,4V
500W
37A
750W
55A
1000W
70A
1)
Maximum
Maximum
solar array
Charge current
output
@26,8V
500W
18A
1000W
37A
2000W
70A
1)
Maximum
Maximum
solar array
Charge current
output
@40,2V
750W
21
1500W
42
3000W
70A
1)
Maximum
Maximum
solar array
Charge current
output
@53,6V
1000W
21
2000W
42
4000W
70A
1)
1) Taking into account 6% loss (battery cables + controller + PV cables + fuses)
Table 1: Battery cable cross section and power loss
3.3 PV connection
The PV input current of the charge controller is limited to 50A. In case of a potential solar array output
exceeding 50A, the solar array voltage will increase up to the level at which the output is reduced to
50A.
The voltage on the PV input should never exceed 150V under any condition.
The charger will be permanently damaged if the input voltage is too high.
The required PV cable cross section depends on array power and voltage. The table below assumes
that maximum PV power has been installed. Cable cross section can be reduced in case of smaller
solar arrays.
The best efficiency is reached at a PV input voltage that is twice the battery voltage.
DC circuit breakers or fuses must be installed in the positive and negative PV cables, to enable
isolation of the charger during installation or maintenance.
The table below gives some examples of cable cross sections calculated with formula (5).
(in this case I and V are the output current and output voltage of the solar array)
12V system (solar array up to 1000W)
Power loss in
Battery
battery cables
Fuse
α
Rating
(%)
63A
1
80A
1,5
100A
2
24V system (solar array up to 2000W)
Power loss in
Battery
battery cables
Fuse
Rating
α
%
35A
1
63A
1,5
100A
2
36V system (solar array up to 3000W)
Power loss in
Battery
battery cables
Fuse
α
Rating
%
35
0,5
63
0,5
100
1
48V system (solar array up to 4000W)
Power loss in
Battery
battery cables
Fuse
α
rating
%
35
0,5
63
0,5
100
1
Length 2x1,5 m
Length 2x2,5 m
2
2
mm
AWG
mm
25
3
35
25
3
35
25
3
35
Length 2x1,5 m
Length 2x2,5 m
2
2
mm
AWG
mm
6
10
10
6
10
10
10
7
16
Length 2x2,5 m
Length 2x5 m
2
2
mm
AWG
mm
6
10
10
16
5
25
16
5
25
Length 2x2,5 m
Length 2x5 m
2
2
mm
AWG
mm
6
10
10
10
7
16
10
7
16
Length 2x5 m
2
AWG
mm
AWG
2
Not recommended
2
Not recommended
2
Not recommended
Length 2x5 m
2
AWG
mm
AWG
7
16
5
7
25
3
5
35
2
Length 2x10 m
2
AWG
mm
AWG
7
16
5
3
35
2
3
35
2
Length 2x10 m
2
AWG
mm
AWG
7
16
5
5
35
2
5
35
2
3
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