Which DC splar cable is best for solar system

Choosing the right DC solar cable size in a solar photovoltaic system is critical for both performance and safety. The wires need to be correctly sized according to the current and voltage used in the system. China H1Z2Z2-K Solar Wire and  High-Quality 62930 IEC 131 solar cable are popular.

The thickness of the cable core is usually mm2. This area represents the surface area of the cable core. Common wire sizes for solar photovoltaic installations are: 2.5-4-6-10-16-25-35 mm2.

 There are the following types of wires:

1. between batteries and to inverter, 35 or 25 mm2

2. from solar panels to charge controller to batteries 10, 6 and 4 mm2.

3. from the inverter to the grid, 4 and 2.5 mm2

For each category, you must use the appropriate amperage, cable length, and acceptable voltage (and power) loss. To know the core diameter of a stranded cable, look at the insulation of the cable. There is a mark on the cable indicating the thickness of the cable core.

 62930 IEC 131 solar cable Cable sizes have 2.5 - 4 - 6 - 10 - 16 - 25 - 35 mm2,Tinned Copper Double Core Solar Cable sizes have 2*2.5mm2,2*4mm2,2*6mm2.2*10mm2.China H1Z2Z2-K Solar Wire sizes have 2.5 - 4 - 6 - 10 - 16 - 25 - 35 mm2.

These cables handle the direct current (DC) generated by solar panels and are stored in batteries. They include:

PV Module Cables: These cables connect the solar panels to the charge controller, which regulates the flow of power to the battery bank. PV module cables are typically 10-12 AWG (American Wire Gauge), double-insulated solar cables designed to handle the DC output from solar panels.

Battery Cables: Battery cables connect the battery bank to the charge controller and the inverter. They are responsible for carrying the DC power between these components. Battery cables are generally larger in size, ranging from 2-4/0 AWG, depending on the system capacity and the current they need to carry.

Inverter Cables: These cables connect the inverter to the battery bank, transferring the DC power from the batteries to the inverter. Inverter cables are usually similar in size to battery cables, typically 2-4/0 AWG, to handle the required current between the battery bank and the inverter.