Sun-powered electric options were once limited to large dark panels, but now consumers have a choice. In addition to panels of single or multi-crystal solar cells, solar film or thin film solar units are available in frames or in building materials such as roof laminates. Each technology has advantages. The choice depends on budget, space, climate, and aesthetics.
The cells that make up a crystalline photovoltaic module stand out as dark rectangles or octagons. A multi-crystalline cell often appears as a sparkly rectangle. The electrical connections in both technologies show as a pattern of silver lines.
“Thin-film” does not refer to a specific material. These modules can be made of amorphous silicon (a-Si), copper indium gallium diselenide (CIGS), and cadmium telluride (CdTe). Amorphous silicon is popular for applications where looks matter. Since it can be put on plastic, as well as on glass, a-Si can be produce in flexible continuous rolls. Amorphous silicon is used in laminates, solar shingles and roofing tiles.
Aside from appearance and versatility, efficiency is a factor in PV material selection. A convention framed crystalline system will produce more power in less space. The flexible photovoltaic systems, while more aesthetically pleasing, are about half as efficient. This means a flexible module will need twice as much space to generate the same amount of energy as a conventional system.
This has a big effect on system size. A three by three foot solar laminate system can deliver 60 to 70 W, with efficiencies as high as 8%. A three by five foot crystalline module can provide 170 to 220 W, with up to 17% efficiency. But power density is not the only consideration.
Cell temperature has an impact on PV cell power. Crystalline modules lose efficiency at higher temperatures. Solar film units are less sensitive to environmental temperature, losing perhaps 2% of their power at 100F, compared to 6% power loss for a traditional crystalline system. The cell temperature can be modified by allowing for air flow around the system, but if ambient temperatures tend to be high, a thin-film system may be the right choice.
New amorphous silicon modules produce 20% to 25% more energy production than rated. While this will stabilize to the normal rated output within six to twelve months, any system using these modules must be able to handle the initial higher output. Traditional modules stabilize immediately, which eliminates this consideration. Once the a-Si modules become stable, they will degrade at approximately the same rate as other systems.
Not all climates are sunny, so shade and low-light performance may be an additional concern. Flexible sun-powered panel cells can be the same length as the module they are on. These cells are less likely to be completely in shade than crystalline cells, which are usually just five or six inches across.
One type of technology that gives good performance in shade or conditions of low light is that used by Uni-Solar products. These modules are flexible, and have triple junction cells made of amorphous silicon. This technology allows bypass diodes to be used within the module, so that any cell that is in shade can be bypassed. In addition, this arrangement lets each element in the multi-junction cell capture a different wavelength of light. This gives better energy production in conditions where lighting is indirect or not uniform.
About The Author
Kriss Bergethon is a writer and solar expert from Colorado.
200 Watt Solar Panel: Choosing The Right 200 Watt Solar Panel
A 200 watt solar panel, or a number of 200 watt solar panels, to produce power for your home, office or other building/location, is a major investment. And, like all major investments, your investment in a good 200 watt solar panel should not be taken lightly. In fact, in order for your pv solar system to function properly, save you money and pay for itself in the shortest amount of time possible, choosing the right 200 watt solar panel is just as, if not more, important as choosing the other system components and properly installing the complete pv solar system.
Today, the 200 watt solar panel is incredibly popular, and is often the choice of homeowners, business owners and professional solar installers for both grid-tie and off-grid pv solar systems. The rise in demand for the 200 watt solar panel can be attributed to many factors, including:
The lower cost of silicon-based pv panels
The increased demand for home and commercial-size pv system installations
The combination of size, power output and price that make the 200 watt solar panel one of the most cost-effective investments
So, when you are looking for the 200 watt solar panel you are going to use for your own grid-tie or off-grid pv system, or the 200 watt solar panel that you are going to recommend and install for your clients and customers, what criteria should you consider?
Well, there are several.
First, the price. I know that it is not always wise to go with the lowest bidder, and I would never recommend it (for the most part). However, if you notice that a particular 200 watt solar panel costs significantly more than other 200 watt solar panels, which all seem fairly similar in their specifications, performance and reviews, it is probably most cost-effective to steer clear of extremely high model(s) and go with a more reasonable, average price 200 watt solar panel. Just remember to make sure that you do not over-step your budget trying to invest in the most expensive (which is not always the best) 200 watt solar panel you can find.
Second, the supplier or manufacturer. Have you heard of the supplier or manufacturer of the 200 watt solar panel
1000
you are considering? Do you know a friend, family member, neighbor or co-worker who has worked with them in the past? It is always recommended that you do due-diligence in researching at least a little bit of background on a company before ordering your 200 watt solar panel (or any product for that matter) from them. However – just as a side note, you should also keep in mind that though you may find a few negatives or black marks about a company online, this is often 1, 2 or a handful of people at most (out tens, or even hundreds, of thousands of people) who have had a bad experience with the company.
Once you have found the 200 watt solar panel that fits your budget, is fairly priced according the market and its performance, and is from a supplier that you trust, or who has worked with someone that you trust, you are really all set, and are ready to install your new 200 watt solar panel, and start saving money on your electric bills right away.
By: Solar Training
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You can get my favorite www.siliconsolar.com/grid-tie-off-grid-solar-panels.html“>200 watt solar panel at:
www.siliconsolar.com/grid-tie-off-grid-solar-panels.html
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Sam Nichols started to generate his own solar power for his home in Montana back in 2001. He was given some blueprints from a friend that didn't understand it. Sam used this as his basis for creating and expanding on ways to create your own solar power. 
