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Polycrystalline Silicon Solar Cells:
Solar cells is made by solar wafer, it has three categories of solar cell right now, monocrystalline polycrystalline and thin film,These cells are entirely based around the concept of ap-n junction, which is the critical part of solar module, it is the part that can convert the light energy into electricity, the thickness is from 180um to 200um, with even busbars to conduct electricity, textured cell can decrease diffuse reflection; they 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 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;With high quality and stable quality. Our Cells can greatly improve the performance of Solar Modules.
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.
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.
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
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 [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
Solar Panel Images：
We have organized several common questions for our clients，may help you sincerely：
①What price for each watt?
It depends on the efficiency of the solar cell, quantity, delivery date and payment terms.
②How 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.
③Can 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.
④What 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
• ⑤How 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.
⑥ Can you do OEM for us?
Yes, we can.
Points to note when buy solar cells
Since the input of solar energy photovoltaic power generation system is unstable, it is generally required to configure the battery system to work, and solar lighting is no exception which you must configure the battery to work. Generally three are lead-acid batteries, Ni-Cd batteries and Ni-H batteries; their capacity and system reliability selection directly affect the price of the system. Choice of battery capacity generally follow the following principles: First, to meet the night lighting under the premise, as far as possible the energy stored during the day and down the solar cell module, but also capable of storing electrical energy to meet the continuous rainy days night lighting needs. Battery capacity is too small cannot meet the needs of lighting at night; the battery capacity is too large, while the battery is always in the state of power loss, affecting battery life, while wastage.
Select dispensing form when buy solar cells
Currently, there are mainly two kind’s packages of solar cells: Epoxy and laminates. Lamination process ensures that the solar battery life is more than 25 years; though epoxy is beautiful, the solar battery life is only 1 to 2 years. Therefore, 1W power solar lawn below the small, in the absence of the high life requirements of the situation, you can use the dispensing package, there are provisions for the life of the solar light, it is recommended to use laminated package. Further, there is a dispensing package for silicone gel solar cells, the working life of that solar cell is said to be up to 10 years.
Select the power when buy solar cells
Output power WP we mean is the output power of the solar cell under the standard sunlight , 101 standard, radiation intensity 1000W / m2, the air quality of AM1.5, cell temperature 25 ℃ conditions, which is by the European Commission. This condition is probably the same conditions with the usual sunlight sunny around noon, which is not, as some people imagine that kind, as long as the sun will have a rated output power, even at night that the solar lamp can be used normally. That is to say, the solar cell output power is random, at different times, different locations, also a solar cell output power is different. When people buy solar lights, in between aesthetics and energy, most of them choose energy-saving.
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