4. Wire Size Selection
All electrical systems lose energy due to resistance in conductors: the wires.
•
The larger the wire is , the less resistance and the loss are
•
Resistance losses will also increase with increasing current; therefore, if you installation is at a high wind site, it may be worthwhile to go with a
larger size wire to lower the loss and enhance the output of wind turbine.
•
Conversely, in low wind sites it may not be cost effective to increase the wire size since power production will be comparative lower.
To determine the wire size, measuring the distance from the batteries to wind turbine is necessary, be sure to include height of the tower. Refer to the
appropriate chart for your system voltage and select the wire size. The following wire sizes provide maximum annual energy losses of 3% for most
sites.
3000W/48V system
Distance from wind generator
to controller
0
—10m
11
—20m
21
—30m
31
—40m
41
—50m
51
—60m
61
—70m
71
—90m
AWG/Metric Wire Size
mm²
9/6 mm²
9/6 mm²
8/8 mm²
7/10 mm²
6/13 mm²
5/16 mm²
4/21 mm²
4/21 mm²
3000W/110V system
Distance from wind generator
to controller
0
—10m
11
—20m
21
—30m
31
—40m
41
—50m
51
—60m
61
—70m
70
—100m
AWG/Metric Wire Size
mm²
11/4 mm²
11/4 mm²
11/4 mm²
11/4 mm²
11/4 mm²
9/6 mm²
9/6 mm²
9/6 mm²
3000W/220V system
Distance from wind
generator
to controller
0
—10m
11
—20m
21
—30m
31
—40m
41
—50m
51
—70m
71
—90m
91
—110m
AWG/Metric Wire
Size mm²
11/4 mm²
11/4mm²
11/4 mm²
11/4 mm²
11/4 mm²
11/4 mm²
11/4 mm²
11/4 mm²
21
