© 2002-2014   This Site Created and Maintained by Terry R. Wolff

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2014 Solar Products Catalog

Specializing in Sustainable Solar and Wind Energy Products to Brighten your Life!

© 2002-2014   This Site Created and Maintained by Terry R. Wolff

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PV Modules

There are three basic types of PV Cells which make up a Solar Panel.


Single Crystal: (monocrystalline) Each cell is made of a single crystal of silicone. Our best modules are made with this type of cell. They are the most efficient, perform the best in most conditions, and last the longest.They cost more, but are worth it. The first single crystal solar cells made by Bell labs in the 1950s still produce electricity!




Multi Crystal: (polycrystalline) Each cell is made of many crystals. They work well and are cheaper.




Amorphous: these cells are grown without crystals at all. They are good for specialty applications like roofing or RVs, because they can work if shaded, and can bend. They can deteoriate in sunlight and are the least efficient.


Cell Structure

Brand Samples

Performance in the below conditions

Warranties

Early Morning &

Late Afternoon

Part

Shaded

Hot

Weather

Single Crystal

Solar World

SunModule

Best

Poor

Best

25 years to 90%

Muti Crystal

BP

Photowatt

Kyocera

Ok

Poor

Ok

20 years to 90%

Amorphous

Unisolar

Good

Ok

Good

20 year to 80%

Module Rating

Description

Maximum Power

Pmax

The most watts produced by a module under standard test conditions. In Real life conditions a module may make only 80 to 90% of this rating, due to heat, dirt, wire losses, and the fact that the module may be operating at lower voltage.

Voltage(max power)

Vmp

The voltage at which a module makes its most power. (For example, a 12 volt nominal module, Vmp can be as high as 17 volts.)

Voltage (open circuit)

Voc

The module's highest voltage at no current. (A 12 volt nominal module may go over 22volts)

Amps (max power)

Amp

The current at the module's Max Power Point. (usually around 90% of short circuit current)

Amps (short circuit)

Asc

The highest current the module can make at no voltage.

Maximum series Fuse

The largest amp fuse or breaker to use with the module.  (modules with a higher rating, can be paralleled in some cases to save on wiring and breakers)

Click here to view our selection of PV Modules, wattages, our prices, and to make your PV Panel purchase