New Fashion Design for Mono-Crystalline 10W Solar Panel Factory in Naples

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Mono-Crystalline 10W Solar Panel

Technical parameter

Maximum Power(W)                           10W

Optimum Power Voltage(Vmp)        17.56V

Optimum Operating Current(Imp)    0.58A

Open Circuit Voltage(Voc)                 21.35V

Short Circuit Current(Isc)                   0.64A

Mechanical Characteristics

Cell Type Mono-crystalline                 52x35mm

No of Cell                                           36 (4x9pcs)

Dimensions                                        250x370x17mm

Weight                                               1.2Kg

Front Glass                                        3.5mm,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——Mono-crystalline solar cell 52*35mm

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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    Most of today’s electronic devices are made with single crystal silicon. But silicon never occurs alone in nature as an element, so how do we make it?

    Silicon is the second most abundant element in the earth’s crust, but they mainly exist as silica, impure SiO2, and silicates, Si + O + another element. Normal sand and the sand used in the building industry is usually colored red, yellow or orange due to the presence of impurities, and we don’t use them. Instead, what we need is silica sand, or high purity quartz rock, which we get from quarrying. Ideally the silica has low concentrations of iron, aluminum and other metals.

    The process of silicon purification is illustrated in this flow chart.

    The silica sand powder is heated together with carbon in an electric furnace to 1,800°C. Carbon pulls the oxygen away from silicon dioxide and becomes carbon dioxide, leaving behind low-grade impure silicon. The silicon is then treated with oxygen to remove impurities such as calcium or aluminum, leaving up to 99% pure silicon.

    This silicon is still not pure enough for semiconductor chipmakers. So it is ground into a fine powder, mixed with hydrogen chloride and heated at 300 degrees C. This process yields Trichlorosilane , HSiCl3, a liquid at room temperature.

    The above process also creates chlorides of unwanted elements such as iron, aluminum, boron and phosphorus. The HSiCl3 has a low boiling point of 31.8 °C and distillation is used to purify the HSiCl3 from theimpurity halides.

    Then this high-purity trichlorosilane, HSiCl3, is vaporized in hydrogen atmosphere at 1,100 degrees C for 200~300 hours. The reaction takes place inside large vacuum chambers and the silicon is deposited onto electrically heated thin polysilicon rods, small grain size silicon, to produce high-purity polysilicon rods of diameter 150-200mm. This electronic-grade silicon has purity of 99.999999%, eight nines.

    The previous steps produced ultra-pure silicon, however, it is not single crystal silicon, crystalline, instead it is polysilicon, polycrystalline, and is composed of lots of small silicon crystals and the boundaries between them can cause trouble with electronic signals. So we have to convert it to large single crystal silicon, crystalline.

    The resulting polysilicon rods from last page are broken up to feed the crystallization process.  This process is called the Czochralski method.

    The ultra-pure polycrystalline silicon is placed in a quartz crucible and molten in an inert atmosphere.
    A small single crystal, or Si “seed” crystal, is clamped to a metal rod with the normal to its bottom carefully aligned along a pre-determined direction, typically 111 or 100 direction.
    The “seed” crystal is dipped into the melt. Once thermal equilibrium is achieved, the temperature of the melt close to the seed crystal is reduced, and silicon from the melt begins to freeze out onto the seed crystal, forming a perfect extension of the seed crystal.
    The seed crystal is slowly rotated in the opposite direction to the rotation of the crucible and withdrawn from the melt; this allows more and more silicon to freeze out on the bottom of the growing crystal.
    The resulting large, cylindrically shaped single crystal of silicon is typically 4 to 6 inches in diameter and 1 to 2 meters in length.

    We will briefly introduce the process for making silicon wafers used for semiconductor device fabrication.

    First, the cylindrical single crystal silicon rod is cut with diamond-edged saw to create very thin wafers. The sharp edges are then smoothed to prevent from chipping.
    The wafers surfaces are polished using an abrasive slurry until the wafers are flat to a tolerance of two thousandths of a millimeter.
    The wafer is then etched with a mixture of nitric, hydrofluoric and acetic acids to create an even smoother surface.



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