Product Manual

6
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)
12V system (solar array up to 1000W)
Maximum
solar array
output
Maximum
Charge
current
@13,4V
Battery
Fuse
Rating
Power loss
in battery
cablesα (%)
Length 2x1,5 m Length 2x2,5 m Length 2x5 m
mm
2
AWG mm
2
AWG mm
2
AWG
500W 37A 63A 1 16 5 25 3 Not recommended
750W 55A 80A 1,5 16 5 25 3 Not recommended
1000W 70A 1) 100A 2 25 3 35 2 Not recommended
24V system (solar array up to 2000W)
Maximum
solar array
output
Maximum
Charge
current
@26,8V
Battery
Fuse
Rating
Power loss
in battery
cables α (%)
Length 2x1,5 m Length 2x2,5 m Length 2x5 m
mm
2
AWG mm
2
AWG mm
2
AWG
500W 18A 35A 1 6 10 10 7 16 5
1000W 37A 63A 1,5 10 7 10 7 25 3
2000W 70A 1) 100A 2 25 3 25 3 35 2
48V system (solar array up to 4000W)
Maximum
solar array
output
Maximum
Charge
current
@53,6V
Battery
Fuse
rating
Power loss
in battery
cables α (%)
Length 2x2,5 m Length 2x5 m Length 2x10 m
mm
2
AWG mm
2
AWG mm
2
AWG
1000W 21 35 0,5 6 10 10 7 16 5
2000W 42 63 0,5 10 7 16 5 35 2
4000W 70A 1) 100 1 25 3 25 3 35 2
1) Taking into account 6% loss (battery cables + controller + PV cables + fuses)
Note 1: highlighted cable cross sections: minimum cross section due to thermal limit.
Note 2: please consult local regulations regarding maximum allowed current carrying capacity of cables.
Table 1: Battery cable cross section and power loss
36V system (solar array up to 3000W)
Maximum
solar array
output
Maximum
Charge
current
@40,2V
Battery
Fuse
Rating
Power loss
in battery
cables α (%)
Length 2x2,5 m Length 2x5 m Length 2x10 m
mm
2
AWG mm
2
AWG mm
2
AWG
750W 21 35 0,5 6 10 10 7 16 5
1500W 42 63 0,5 16 5 25 3 35 2
3000W 70A 1) 100 1 25 3 25 3 35 2