Wholesale Polycrystalline Solar Cells with High Efficiency and Stable Performance

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Product Description:

 

Polycrystalline Silicon Solar Cells:

A solar cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light. Solar cells are the building blocks of photovoltaic modules, otherwise known as solar panels.

Polycrystalline Silicon Solar Cells Advantage:

•  High efficiency and stable performance in photovoltaic conversion.
•  Advanced diffusion technique ensuring the homogeneity of energy conversion efficiency of the cell.
•  Advanced PECVD film forming, providing a dark blue silicon nitride anti-reflection film of homogenous color and  attractive appearance.
•  High quality metal paste for back surface and electrode, ensuring good conductivity, high pulling strength and ease of soldering.
•  High precision patterning using screen printing, ensuring accurate busbar location for ease with automatic soldering a laser cutting.
 

Specification:

Mechanical data and design

  Format          -       156 mm × 156 mm ± 0.5 mm  

Thickness-       -       200 μm ± 20 μm

Front (-)         -       1.4 mm bus bars (silver),blue anti-reflection coating (silicon nitride)

Back (+)           -     2 mm wide soldering pads (silver) back surface field (aluminium)

Temperature Coefficient of Cells

Voc. Temp .coef.%/K                 -0.364%/K   

Isc . Temp .coef.%/K                 +0.077%/K

Pm. Temp. coef.%/K                 -0.368%/K

 

Electrical Characteristic

Efficiency (%)           Pmpp (W)          Umpp (V)        Impp (A)           Voc (V)          Isc (A)      

  18.00%                    4.380                 0.538             8.141               0.634             8.740

  17.90%                    4.356                 0.538             8.097               0.634             8.725

   17.80%                    4.331                 0.537             8.065                0.633            8.710

   17.70%                    4.307                 0.536             8.035                0.632            8.695

   17.60%                    4.283                 0.535             8.006                0.631            8.680

   17.50%                    4.258                 0.534             7.974                0.630            8.665

  17.40%                    4.234                 0.533             7.944                0.629            8.650

  17.30%                    4.210                 0.532             7.914                0.628            8.635

   17.20%                    4.185                 0.531              7.88    --            0.627        -- 8.620

   17.10%                    4.161                 0.530              7.851                 0.626           8.605

   17.00%                    4.137                 0.529              7.820                0.625           8.590

 

Intensity Dependence

Intensity [W/m2]      Isc× [mA]          Voc× [mV]           Pmpp

1000                         1.00                    1.000                 1.00

900                           0.90                    1.000                 0.90

800                           0.80                    0.99                   0.80

500                           0.50                    0.96                   0.49

300                           0.30                    0.93                   0.29

200                           0.20                    0.92                   0.19

 

IV Curve

Wholesale Polycrystalline Solar Cells with High Efficiency and Stable Performance

 

Usage of Polycrystalline Solar Cells

Solar cells are often electrically connected and encapsulated as a module. Photovoltaic modules often have a sheet of glass on the front (sun up) side, allowing light to pass while protecting the semiconductor wafers from abrasion and impact due to wind-driven debris, rain, hail, etc. Solar cells are also usually connected in series in modules, creating an additive voltage. Connecting cells in parallel will yield a higher current; our solar cells have passed IEC Certification. With high and stable quality, our cells can greatly improve the performance of Solar Modules.

Applications of Polycrystalline Solar Cells

Assemblies of photovoltaic cells are used to make solar modules which generate electrical power from sunlight, as distinguished from a "solar module" or "solar panel". A solar array generates solar power using solar energy.

Packaging & Delivery of Polycrystalline Solar Cells

Carton Box Package and Deliver by air. It should be noticed that it should be avoid of water, sunshine and moist.

Solar Panel Images:

Wholesale Polycrystalline Solar Cells with High Efficiency and Stable Performance

Wholesale Polycrystalline Solar Cells with High Efficiency and Stable Performance

 

 

Wholesale Polycrystalline Solar Cells with High Efficiency and Stable Performance

 

 

Wholesale Polycrystalline Solar Cells with High Efficiency and Stable Performance

 

 FAQ

We have organized several common questions for our clientsmay help you sincerely

What price for each watt?

It depends on the efficiency of the solar cell, quantity, delivery date and payment terms.

How long can we receive the product after purchase?

In the purchase of product within three working days, We will arrange the factory delivery as soon as possible. The pecific time of receiving is related to the state and position of customers.Commonly 7 to 10 working days can be served.

Can you provide the peripheral products of the solar panels, such as the battery, controller, and inverter? If so, can you tell me how do they match each other?

Yes, we can, we have two companies for solar region, one is CNBM International, the other is CNBM engineering Co.

We can provide you not only the solar module but also the off grid solar system, we can also provide you service with on grid plant.

What is your warranty of solar cell?

 Our product can promise lower than 0.3% open box crack, we support claim after opening the box if it has crackm color difference or sth, the buyer should give pictures immediately, we can not accept the claim after the solar cell has assembled to solar panel.

• Timeliness of delivery

 How do you pack your products?

We have rich experience on how to pack the solar cell to make sure the safety on shipment, we could use wooden box or pallet as buyer's preference.

 Can you do OEM for us?

Yes, we can.

 

 

Brief introduction of High Current Solar Cell

The output voltage of the high current solar cell must be calibrated high-voltage battery voltage. When the battery is fully charged, the controller disconnects the charging circuit. When the battery voltage is lower than the set voltage value, the charging circuit will re-open. Solar cells are to use light, when the charging is straight.

Slotted solar cells reduce the positive coverage, while expanding the contact electrodes, greatly improving the current collection, and thus obtain higher conversion efficiency.

Slotted solar cells due to process at the current level of processing technology and processing techniques should be relatively simple terms, it is the most suitable for large-scale industrial production, BP Spain UNSW use of technology has produced nearly a hundred since 1992 MW BCSC batteries, the main problem is to solve the industrialization process route design, and strict quality control of the production process.

Among the many aspects to consider in order slotting process and metallization process is most important, not only to the quality of the battery and cell conversion efficiency, but also a very strong impact on industrial productivity. Slotting process a variety of styles, laser, mechanical grooving, chemical corrosion, physical groove, etc., which have a mature technology; we can meet the design requirements. In particular it should be noted that the groove is formed BC battery key, groove, physical dimensions and surface state will very strongly affect battery performance parameters, in addition to metalization BC battery is a very important part, should arouse a high degree of seriously.
BCSC for monocrystalline silicon single-crystal silicon, should use high quality Cz silicon, should try to reduce the oxygen, and carbon content of heavy metal impurities, special emphasis is to select few defects, in order to ensure a higher wafer carrier lifetime.

 

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Q:How can I understand the working principles of solar cells?
You have to spend more time than you thought to really understand it.
Q:How to get high voltage and high current output of solar cells?
The high current solar cells means the high voltage, if you want to achieve that goal, you need to put the circuits inside the solar cells in serial-parallel.
Q:How can the huge solar cells be applied into the market?
If you are just using power supply for daily usage, such as a family of 6, you don’t need the huge solar cells.
Q:What is Solar Cell Technology?
The clean energy.
Q:Can I buy solar cells easily online?
I think so.
Q:Can the solar powered cells really work better than the normal cells?
Because of the different ways of generating the power, the solar powered cells definitely better than the normal cells in the modern world.
Q:Are there any books in the market t about solar cells and their applications?
You can try to search online about the application of solar cells.
Q:I bought a new poly solar cells, and the test result of the conversion efficiency is 16.8%, is it lower than usual?
It depends on what kind os poly solar cell you are using, if it is 260 watt photovoltaic solar panel, 16.8% is a bit lower.
Q:How does a solar cell raise industrial efficiency?
December 2014, the world record for solar cell efficiency at 46% was achieved.
Q:I am a purchasing manager for a EPC engineering company, and we are planning to purchasing some 4bb solar cells for one of our project in Taiwan, can I get a quotation online?
We do have 4bb solar cells, but we also have 125Mono &156 Multi&Mono 2BB&3BB&4BB A grade solar cell.

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