How to choose a cable with a suitable MPPT wire diameter

Column:Industry News Time:2021-02-25
It is very important to choose a suitable cable diameter for the controller. Generally, at least ensure that the voltage drop of the cable from the controller to the solar panel

It is very important to choose a suitable cable diameter for the controller. Generally, at least ensure that the voltage drop of the cable from the controller to the solar panel, the controller to the battery, and the controller to the load is less than 2% of the system voltage.

The following table 3-2 provides the minimum wire diameter requirements at an ambient temperature of 45 degrees Celsius:

Model

Copper Wire Type

Recommended Size

Minimum Size

20A

Copper

10AWG

12AWG

30A

Copper

10AWG

12AWG

40A

Copper

6AWG

8AWG

50A

Copper

5AWG

6AWG

60A

Copper

5AWG

6AWG

70A

Copper

4AWG

5AWG

80A

Copper

4AWG

5AWG