Good User Reputation for Poly-crystalline Solar Panel 250W Roman

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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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  • Moving into a new house is exciting, and exploring all the nooks and crannies is part of the fun. But sometimes you might stumble across something a lot more interesting than a spider. These people were just minding their own business on their new property when they found strange things in their own backyard.

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    A man’s idea to install solar panels led to the discovery of $175,000 worth of pot. Digging around in his backyard, Mack Reed stumbled across an open vault hidden underneath a hot tub. Reed called in a technician to take a look, and it was then that he spied a bag stuffed inside. In the bag was the mother lode of weed. There were about sixty little bottles containing weed, and sealed bags with other kinds of drugs.

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    An ancient stone that was recorded in legal papers dating back to 1170 was discovered by an amateur historian after he researched the history of his own home. Stephen Davis read up on the history of the house he owned and came across a reference to an ancient stone that was thought to have marked a burial plot from the Bronze Age dating back to about 2,500 B.C.

    6. Metal Door to the Past
    What would you do if you discovered a metal door hidden in your backyard? The Zwick family was faced with this decision and they hesitated for ten years before they decided to get the door open and have a peek at what was inside. When the door swung open they found a metal bunker in the ground. A ladder was fastened to the side and the family saw that the bunker was flooded with water. They had found a war shelter dating back to the Cold War.

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    John from Iowa and his two boys were picking blackberries in the thickly wooded area on their property in 2010 when one of the boys thought he spotted a ball in the distance. Upon getting closer to the object John saw that it was no ball, but was in fact a bone sticking out of the ground. He started digging and eventually produced a four foot femur. He took the bone to the University of Iowa, where it was identified as belonging to a woolly mammoth that lived during the Ice Age. Fossil experts undertook two digs on John’s property and discovered foot bones as well as rib bones.

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    It’s not everyday that the discovery of an 400 year old skeleton costs a family $5,000. Ken Sauve discovered bones in the yard while trying to create holes deep enough for fence posts. Thinking the bones belong to an animal, Ken quickly forgot about them. When his wife Nicole pressed the issue, they kept digging and eventually unearthed the skeleton of an aboriginal woman.

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