Wholesale Polycrystalline Solar Cells with High Efficiency and Stable Performance

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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?
All in all, the working principle of a solar cell can be understood in this way, a high technology that use the sun energy for electricity.
Q:What is the difference between polysilicon and monocrystalline silicon photovoltaic cells?
Monocrystalline silicon is made of polycrystalline silicon by a single crystal furnace, but also useful for the preparation of monocrystalline silicon melting. Polysilicon is the direct raw material for the production of monocrystalline silicon, which is the basic material of electronic information for semiconductor devices such as contemporary artificial intelligence, automatic control, information processing, photoelectric conversion and so on. Known as the "cornerstone of the microelectronics building."
Q:How does the solar cell work in terms of photochemical conversion?
Photovoltaic power generation principle is the photoelectric transformation, we all know, the semiconductor is between the insulator and the conductor, with a certain conductive properties of the material.
Q:What can be used as the materials for solar cells?
As far as I know, silicon is used as the material for solar cells.
Q:Solar cells and the difference between ordinary batteries. Why is the solar cell is converted into electrical energy, zinc battery is what is converted into chemical energy
Ordinary batteries have a certain life, can not be stored for too long, or the power will slowly run out of solar cells do not exist chemical failure, can be long-term preservation.
Q:Which Solar Panel Type is best? Polycrystalline panel or PV Module Monocrystalline Solar cell panel, or thin film?
PV Module Monocrystalline Solar cell panels is most efficient since they are made from the highest-grade silicon.
Q:Why are the poly Solar cell specifications is different from each other, they seem to have the different size of 125mm, 156mm, 152mm, is the 152mm's battery technology is higher than the other?
The poly solar cell which is 156mm is not necessary high technology-based than the others. In fact, it's less efficient than the others.
Q:What are the advantages of monocrystalline silicon and polycrystalline silicon in solar power?
polysilicon, ribbon silicon, thin film materials (including microcrystalline silicon-based film, compound-based film and dye film). From the industrial development point of view, the focus from the single crystal to the direction of the development of polysilicon and film, the main reason: [1] solar head can supply more and less head and tail; [2] for solar cells, (3 hours) The production process of polysilicon is progressing continuously. The automatic casting furnace can produce more than 200 kilograms of ingot per production cycle (50 hours),
Q:Silicon solar cell power generation principle
In the case of homogeneous semiconducting materials; one is at the interface of the semiconductor. Although there are some similarities between them, the specific mechanisms that produce these two effects are not the same. ], And the meaning of the photovoltaic effect is confined to the latter case.
Q:How is the solar panel and the battery connected?
Solar cells and battery connection, it is best to use a photovoltaic charging controller, which can control the output voltage of solar cells can protect the battery is not overcharge, but also at night when the solar cell does not generate electricity, to prevent the battery power back

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