China wholesale Poly-crystalline Solar Panel 250W Factory for Johor
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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
Experiments into the use for a solar panel with impact damage and broken glass.
What a broken panel looks like.
It is possible to use it at a lower voltage depending on where the damage is. See part 2 for current tests.
Homemade AC Air Cooler. Simple DIY. air cooler is made with a 2 gallon bucket, pvc pipe, computer cooling fan and ice. (small solar panel optional). works great for “personal” space cooling. fan used is a “b-blaster 120″. draws only 3.84 watts (any 4 watt or higher “12v solar panel” will run it full speed). high airflow 103 cfm (cubic feet per minute). bucket holds roughly 8 lbs of ice cubes at a time (or an 8 pound ice block). in testing, cubes lasted 3 to 4 hours in 82F air (block lasts longer – roughly twice as long). no inner styrofoam liner is used on this one. i put the bucket in a metal pot to catch any condensation. (to due extremely dry/arid conditions (5% humidity) there wasn’t any)
