JZD Wire & Cable Factory
More Than 20 Years Experience
More Than 20 Years Experience
Author: Joey Wan 
November 10,2021
Solar Panels have been becoming more and more common used device in modern life. As the critical parts in whole solar generating system,DC wire for solar panels plays a vital role in whole working process.
Introduction to solar panel
The cells in common solar panels are made of silicon wafers. When the sun shines on them, the positive charges move toward one pole and the negative charges toward the other. This creates a potential difference - a voltage - between the poles, which is connected to a load such as a resistor to form an electric current. This current is obviously direct current.
Of course, if we have special needs, we can convert this direct current into alternating current by means of an inverter. Another way is more traditional, where the coil is transferred in a magnetic field and the alternating current can be generated directly.
The voltage of a single solar cell is generally 0.4~0.7V. The common solar cell module is 36/54/60/72/96 in series, and the voltage is about 18/27/30/36/48 VOLTS. It should be noted that the voltage of the segmented cell is still the same as that of the single cell. Because it is in series, the current of the monomer and the component is generally 4-5 amperes for the 5-inch battery, and 7-8 amperes for the 6-inch battery.
The power of a 1 square meter solar panel is about 140-150W, which is a relatively fixed metric, but the daily illumination is a variable, rainy, cloudy, morning, evening...... In theory, 1 square meter of solar panels can generate 1.4-1.5 KWH of electricity in 10 hours.
High-performance solar cell modules are installed on the roof through a bracket. After being connected in series and in parallel, they form a solar cell array. The solar cell array absorbs sunlight and generates direct current, which is converted into alternating current for home use by photovoltaic inverters and uploaded to the power grid.
The main components of a complete solar panel system are: photovoltaic module, inverter, bracket, DC cable, AC cable, subsidy electricity meter, two-way electricity meter.
Working principle of photovoltaic power inverter; The direct function of the inverter is to transform the dc electric energy into AC electric energy. The core of the inverter device is the inverter switch circuit, referred to as the inverter circuit. The circuit through the power electronic switch on and off, to complete the inverter function. The on-off of power electronic switching device requires a certain driving pulse. These pulses may be modulated by changing a voltage signal. The circuit that generates and regulates pulses is usually called a control circuit or control loop. Photovoltaic power inverter is characterized by high conversion efficiency, fast start, good safety performance, the product has short circuit, overload, over/under voltage over temperature five protection functions.
The DC wire for solar panels that we have in our homes will often have black panels at the end, because in a DC system, it's very easy to oxidize and black the connectors. The reason is that the presence of water in the air makes the joint under the electrolytic corrosion of the DC current, which will soon be oxidized and corroded and blackened. Pay attention to, the wiring of fixed telephone is also such, live bottom floor family, telephone machine tail rope often can from the beginning to the end of the inside of the wire has a black (connect dc positive pole that), and wire quality does not concern.
Is it necessary to connect solar panels and inverters with "DC wire" for home installed solar power generation system? Still?
In theory, of course you need use the DC wire for your solar panels, because the normal wire has no the ability to resist the high temperature, such as in summers of some European countries, the average temperature outside maybe can reach at 50 degree, maybe someone will refer to the silicone cable, yes, this also is a very excellent wire in the high temperature resistant performance, however sometimes the voltage your solar panel outputs exceeds the ability the silicone cable can has.
In the end there is a interested question relative to our daily life;
Can the connection between photovoltaic panel and solar lamp be lengthened by ordinary two wires?
Of course, we should pay attention to the positive and negative poles can not be connected wrong. In theory, as long as electricity, whether direct current or alternating current, can be lengthened with ordinary wire, but lengthening will produce resistance loss, resulting in voltage drop. So there's a limit to lengthening.
JZD Wire&Cable has been manufacturing the DC wire for solar panels for 10 years and we have been exporting to France, Australia, Brazil, Italy, Japan for 5 years. Of course we aslo produce the RVV cable, solar cable for several years, if you have any problems, you can contact us anytime.
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