1. Check whether the cable manufacturer has a photovoltaic cable production license, whether it has TUV, UL, SUD and other certification certificates;

There are only two current standards for photovoltaic cables, one is the EU EN standard, and the other is the US UL standard. At present, there are two main EU EN standards for domestic photovoltaic cables:

First of all 2 PFG 1169 / 08.2007 old standard, the photovoltaic cable specification model produced by this standard is: PV1-F (1*2.5/1*4/1*6/2*4mm? etc.) The most widely used range, the price is slightly lower One point, most of the current customers accept this type of photovoltaic cable

Followed by the new EN50618:2014 standard. The specifications of photovoltaic cables produced by this standard are: H1Z2Z2-K (1*2.5/1*4/1*6-240mm? etc.), which are mainly popular in European countries. This standard is newly added. Environmentally friendly smoke density and other testing standards, so the price is slightly higher.

2. Look at the material of the photovoltaic cable

The conductor uses Category 5 soft conductor red copper wire to be tinned, which conforms to the IEC 60228 (International Electrotechnical Association IEC 60228 standard) or the European and American EN 60228 standard. The conductor is flexible and easy to install.

Insulation/sheath material is radiation cross-linked polyolefin (XLPE or XLPO), a polymer compound, non-toxic, halogen-free, environmentally friendly, high strength, good insulation, high and low-temperature resistance, oil stain resistance, UV resistance And so on, is the main material used for cables in the future.

The electron irradiation accelerator is used for irradiation processing, which achieves excellent characteristics such as environmental temperature resistance -40-120 ℃, UV resistance, and corrosion resistance. Owning its own core irradiation equipment to avoid the increased cost of outsourcing processing.

3. Look at the appearance

The appearance is bright and has no scratches, and the printing is clear. The printing content includes the company name and the TUV logo.

4. Look at the certification of photovoltaic cables

There are currently two main types of certification for photovoltaic cables (UL certification is not covered in this article): TUV Rheinlａnd (TUV Rheinland) and TUV SUD (TUV South Germany).

5. Misunderstandings in the purchase of photovoltaic cables

1) Cheap price

Such products are either not certified or use inferior raw materials.

Three no products: no qualification, no certification, no product certificate;

Use inferior copper: use oxygen-free copper with a price of about 47000/ton, use inferior reheated copper, the price is about 37000/ton, this kind of inferior copper has low price, high resistance, poor toughness, and unqualified torsion;

Use low-quality tin: normal good tin is about 150,000 or so, inferior is about 120,000. The tin slag with many impurities is reheated to the furnace, and it is made by adding chemical materials. It has high resistance and poor aging ability;

Insulation material: ranging from 8000-16000 yuan/ton. I believe it makes sense to pay for what you pay for. The worst insulating material is repeatedly refined with waste plastic, with poor insulation resistance and poor performance. Require.

2) Quality issues

Poor aging and mechanical properties; short rice.

No irradiation process

In order to save costs and reduce time, some businesses do not do “irradiation", the most critical last process of photovoltaic cables, and ship them directly. Such photovoltaic cables are generally invisible to unprofessional customers. After the photovoltaic cable is irradiated, the insulating material will be resistant to high and low temperature, corrosion, ultraviolet, etc.; the cable that has not been irradiated has a short service life, is prone to aging, and catches fire. This will reduce the service life of the product and the power of power generation. Still the end consumer pays.

Inspection: Use a 250°C electric soldering iron to test the cable. It is found that the insulation melted at once, but it has not been irradiated. If it has not melted, it has been irradiated.

Case: An EPC contractor used a photovoltaic cable from a small domestic factory in the Philippines. Two years later, it was discovered that some of the cables caught fire and burnt. The problem could not be found. The technical team of Jiangsu Zhongli Group was found, and after physical analysis, It was concluded that the cable was not irradiated, and Zhongli’s photovoltaic cable was replaced afterwards.

3) Cut corners

Some manufacturers use cutting corners, short rice and other phenomena to save costs. On the surface, the price has been reduced. However, it is impossible for the merchants to do business at a loss, and they will still make money in other ways. In the end, it is the end customer who pays the bill.

Inspection: spot check, use a tape measure to measure the length of the meter mark.