Amazon.com Price: $159.97 (as of 2012-02-05 18:31:02 GMT)
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Product Description

Polycrystalline solar panels are made from silicon wafers cut from multi-crystal silicon (they are also known as multicrystalline panels) and are also more efficient than amorphous panels. Polycrystalline panels are excellent for all small solar applications like RV’s and 4WD’s. Larger polycrystalline modules are also suitable for domestic and business solar installations. Polycrystalline modules come in both 12-volt modules to cater for 12-volt power systems and 24-volt modules for larger installations. They can be linked in parallel to maintain a 12-volt/24-volt system or can be linked in series to create a higher-voltage system. These modules have proven performance at high temperatures and generally feature a robust design makes the product durable in the field and easy to install. A polycrystalline solar panel is made from a block of silicon that has multiple crystals. These panels are square in shape, and may have a surface that looks somewhat like a mosaic due to all of the different crystals that make up the panel. Other types of panels may appear smooth and even, because they are made up of only silicon crystals, whereas the Polycrystalline looks fragmented and angular. The lifespan of a polycrystalline cell is a minimum of twenty-five years and can be more than fifty, making them a worthwhile investment for long term use. 10 years limited warranty of 90-percent power output and 25 years limited warranty of 80-percent power output. Specifications – Cell: Multicrystalline silicon solar cell (156mm by 26mm), No. of Cells and Connections: 36 (4 by 9), Operating Temperature: -40C to +85C, Type of Output Terminal: Junction box, Power at STC (Pm): 20-Watt. Maximum Power-voltage (Vpm): 17.2-Volt, Maximum Power Current (Ipm): 1.17A, Open Circuit-voltage (Voc): 21.7-volt, Short Circuit Current (Isc): 1.25A, Tolerance: 5-percent. Module Efficiency: 10.0-percent, Maximum System-voltage: 1000-volt DC, Dimensions: 22-inch by 14-inch by 0.71-inch, Weight: 5-1/2-pound.

Product Details

• Operating Temperature: -104-Farenheit to +185-Farenheit
• Maximum System Voltage: 1000-volt DC
• Dimensions: 22-inch by 14-inch by 0.71-inch, Weight: 5-1/2-pound
• Includes 9-foot DC power cord
• Can be linked in parallel to maintain a 12 volt system or can be linked in series to create a higher voltage system

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