Professional China Poly-crystalline Solar Panel 250W for Zurich Manufacturers

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With our excellent management, strong technical capability and strict quality control system, we continue to provide our clients with reliable quality, reasonable prices and excellent services. We aim at becoming one of your most reliable partners and earning your satisfaction for Professional China Poly-crystalline Solar Panel 250W for Zurich Manufacturers, We, with great passion and faithfulness, are willing to provide you with perfect services and striding forward with you to create a bright future.


Poly-crystalline Solar Panel 250W

Technical parameter

Maximum Power(W)                           250W

Optimum Power Voltage(Vmp)           30.25V

Optimum Operating Current(Imp)       8.26A

Open Circuit Voltage(Voc)                  36.61V

Short Circuit Current(Isc)                     8.89A

Mechanical Characteristics

Cell Type Polycrystalline                      156x156mm (6 inch)

No of Cell                                              60 (6x10pcs)

Dimensions                                           1640x990x40mm

Weight                                                   18.5KGS

Front Glass                                            3.2mm,High Transmission, Low Iron,Tempered Glass

Junction box                                          IP65 Rated

Output Cable                                         TUV 1×4.0mm2/UL12AWG,Length:900mm

Temperature and Coefficients

Operating Temperature(°C):               -40°C ~ + 85°C

Maximum System Voltage:                  600V(UL)/1000V(IEC) DC

Maximum Rated Current Series:         15A

Temperature Coefficients of Pmax:     -0.47%

Temperature Coefficients of Voc:        -0.389%

Temperature Coefficients of Isc:           0.057%

Nominal Operationg Cell Temperature (NOCT): 47+/-2°C

 Materials of solar panel

1).Solar Cell——Polycrystalline solar cell 156*156mm

2).Front Glass——-3.2mm, high transmission, low iron, tempered glass

3).EVA——-excellent anti-aging EVA

4).TPT——-TPT hot seal made of flame resistance

5).Frame——anodized aluminum profile

6).Junction Box——-IP65 rated, high quality, with diode protection

Superiority: high quality anodized aluminum frame, high efficiency long life, easy installation, strong wind resistance, strong hail resistance.

Features

1. High cell efficiency with quality silicon materials for long term output stability

2. Strictly quality control ensure the stability and reliability, totally 23 QC procedures

3. High transmittance low iron tempered glass with enhanced stiffness and impact resistance

4. Both Poly-crystalline and Mono-crystalline

5. Excellent performance in harsh weather

6. Outstanding electrical performance under high temperature and low irradiance 

Quality assurance testing

Thermal cycling test

Thermal shock test

Thermal/Freezing and high humidity cycling test

Electrical isolation test 

Hail impact test

Mechanical, wind and twist loading test

Salt mist test

Light and water-exposure test

Moist carbon dioxide/sulphur dioxide

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    Graphene is a material made up of single-atom thick sheets of carbon which makes graphene flexible, conductive, transparent and abundant. Currently, researchers are trying to fully incorporate graphene into thin-film solar cells due to graphene’s high conductance and transparency; however, graphene cannot hold an electrical charge as well as some other materials. As a result, scientists are coming up with new ways to process graphene sheets so that they are better suited for use in solar energy applications.

    One way to improve the use of graphene in solar cells is to dope the sheets of graphene with oxygen to create graphene oxide which is less conductive but better able to hold a charge. If this technology is successfully developed and executed, it could replace the brittle and rare Indium Tin Oxide (ITO) which is a useful, but very expensive conductor. Another idea that scientists are investigating is stacking multiple sheets of graphene together to increase conductance and charge capacity. This allows less light to penetrate the surface of the solar cells but also increases the charge capacity, allowing the graphene sheets to outperform ITO.

    Both of these ideas for graphene usage in solar cells demonstrate the materials science paradigm of processing a material to obtain optimal properties for the application. Our video will talk about the structure of graphene itself and how processing the graphene differently alters the structure of graphene which improves its properties and allows it to perform better in photovoltaic cells. These positive effects of graphene usage in solar cells would clearly benefit the environment by creating cheaper and more efficient solar cells.

    Sources Cited in Abstract:

    http://www.graphene-info.com/graphene-solar-panels

    http://www.graphene-info.com/researchers-say-graphene-will-outperform-ito-solar-panel-transparent-electrode-material

    References:
    Introduction to solar panels, N-type and P-type semiconductors: http://www.nrel.gov/docs/legosti/old/1448.pdf, http://electronicdesign.com/power-sources/what-s-difference-between-thin-film-and-crystalline-silicon-solar-panels
    Image on Page 4 based picture from: https://www.acs.org/content/acs/en/education/resources/highschool/chemmatters/past-issues/archive-2013-2014/how-a-solar-cell-works.html?cq_ck=1396892718960
    Intro to current problems with solar cells: http://www.solarpoweristhefuture.com/problems-with-solar-energy.shtml
    Solar cells are expensive: http://www.sigmaaldrich.com/catalog/product/aldrich/544876?lang=en&region=US, http://energyinformative.org/best-solar-panel-monocrystalline-polycrystalline-thin-film/#thin-film-solar-cells,
    Current solar panels are not efficient : http://www.solarpoweristhefuture.com/how-efficient-is-solar-energy.shtml, http://energyinformative.org/best-solar-panel-monocrystalline-polycrystalline-thin-film/#thin-film-solar-cells, http://www.mpoweruk.com/energy_efficiency.htm
    Properties of Graphene: https://www.graphenea.com/pages/graphene-properties#.WO7aLNLyvb0,
    Second Solution: https://phys.org/news/2013-12-graphene-sheets-effective-transparent-electrodes.html
    MSE Triangle: http://www.graphenomenon.com/, https://www.scientificamerican.com/article/balancing-act/

    Image Credits (in order of appearance):

    https://www.extremetech.com/wp-content/uploads/2015/07/graphene-head.jpg

    https://www.sciencedaily.com/releases/2016/09/160928151119.htm

    https://commons.wikimedia.org/wiki/File:Illust_poly_thinfilm.gif

    Custom images/animation by our team

    https://brainmass.com/hubsimg/1477377/carbon.jpg

    https://www.graphene-info.com/graphene-solar-panels

    https://www.researchgate.net/profile/Shine_Augustine/publication/276394214/figure/fig2/AS:294624238292993@1447255300638/Figure-3-Molecular-structure-of-i-graphene-ii-graphene-oxide-Graphene-exhibits-a.png

    http://www.aerogelgraphene.com/graphene-solar-panels-2/

    http://daais.sinica.edu.tw/english/publication_list.php?yearId=11

    https://www.graphene-info.com/graphene-solar-panels

    http://www.industrialheating.com/ext/resources/Issues/Issues2/2017/Jan/ih0117_mct_fig1-900.jpg

    https://s-media-cache-ak0.pinimg.com/originals/f7/76/be/f776bef5ea60f056da26d4204bcc8cc1.jpg

    https://www.sciencedaily.com/releases/2016/09/160928151119.htm

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