Matters needing attention when choosing photovoltaic cables

At present, PV1-F 1*4 4 square cables are mostly used for photovoltaic DC cables.

However, with the increase of photovoltaic module current and the increase of single inverter power, the length of DC cables is also increasing. DC cable applications are also increasing.

According to relevant specifications, it is generally recommended that the loss of PV DC should not exceed 2%. We design how to choose DC cables according to this standard. The line resistance of PV1-F 1*4mm2 DC cable is 4.6mΩ/meter, and the line resistance of PV 6mm2 DC cable is 4.6mΩ/meter.

It is 3.1mΩ/m. Assuming that the working voltage of the DC component is 600V, the 2% voltage drop loss is 12V.

Assuming that the component current is 13A, 4mm2 DC cable is used. Single string, excluding positive and negative poles), if it is greater than this distance, it is recommended to choose a 6mm2 DC cable, but it is recommended that the distance between the farthest end of the module and the inverter should not exceed 170 meters.