Popular Design for Mono-Crystalline 250W Solar Panel Export to Rio de Janeiro

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Mono-Crystalline 250W Solar Panel

Technical parameter

Maximum Power(W)                        250W

Optimum Power Voltage(Vmp)        30.3V

Optimum Operating Current(Imp)    8.29A

Open Circuit Voltage(Voc)               36.76V

Short Circuit Current(Isc)                 8.91A

Mechanical Characteristics

Cell Type Monocrystalline                 156x156mm (6 inch)

No of Cell                                         60 (6x10pcs)

Dimensions                                     1640x990x40mm

Weight                                             18.0KGS

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——Mono-crystalline 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 Polycrystalline 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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  • V-TAC – 10W LED BULB, SLOVAKIA



    This video was a first attempt at using the YouTube capture and upload app on an iPad2. Seems OK.
    This project was to put 30 LEDs in a circle in the rim of a plastic garden planter. I used a cut-down festoon of signage pixel LEDs. These are basically a parallel festoon of LEDs and resistors potted into a rubbery plastic designed to push-fit through a hole in a metal faceplate. I found 9mm was about the right size of hole in the plastic to grip them tightly.
    They are powered by a cheap Poundland solar garden light originally designed to light a string of five plastic dragonflies. These little solar lights are actually very good. They’re designed for the British climate with our low levels of sunlight and run their LEDs at very low level to give a long run time each night for modest daylight exposure.
    I cut off the original string of 5 LEDs and put on a two pin mini Molex connector, then soldered a matching plug on the string of signage LEDs, using a dab of hot melt glue on the back of the plug to strengthen the wire connection and also keep water away to try and reduce the inevitable electrolytic rusting that happens with DC and water.
    The solar module runs the thirty LEDs at very low level, but they still produce vividly coloured dots of light even at such low current.
    I also put a drop of oil in the little slide switch under the solar module to try and coat the internal contacts, as I find that the switches on these solar lights are very prone to corrosion and failure.
    The LEDs were bought on ebay http://www.ebay.co.uk/itm/110767954466 and typically cost less than 5 GBP in a few different colour choices.

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