CNBM Poly Solar Panel 300W A Grade with Factory Price

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Material: Polycrystalline Silicon Max. Power(W): 300 Number of Cells(pieces): 72

Product Description:

CNBM Poly Solar Panel 300W A Grade with Factory Price

Production description

 solar panels that can always be pointed at the Sun even as the rest of the body of the spacecraft moves around, much as a tank turret can be aimed independently of where the tank is going.

Each module is rated by its DC output power under standard test conditions, and typically ranges from 100 to 365 watts. The efficiency of a module determines the area of a module given the same rated output – an 8% efficient 230 watt module will have twice the area of a 16% efficient 230 watt module. 

Depending on construction, photovoltaic modules can produce electricity from a range of frequencies of light, but usually cannot cover the entire solar range (specifically, ultraviolet, infrared and low or diffused light). Hence, much of the incident sunlight energy is wasted by solar modules, and they can give far higher efficiencies if illuminated with monochromatic light. Therefore, another design concept is to split the light into different wavelength ranges and direct the beams onto different cells tuned to those ranges.[citation needed] This has been projected to be capable of raising efficiency by 50%. Scientists from Spectrolab, a subsidiary of Boeing, have reported development of multijunction solar cells with an efficiency of more than 40%, a new world record for solar photovoltaic cells.

Currently the best achieved sunlight conversion rate (solar module efficiency) is around 21.5% in new commercial products[3] typically lower than the efficiencies of their cells in isolation. The most efficient mass-produced solar modules[disputed – discuss] have power density values of up to 175 W/m2(16.22 W/ft2).[4] Research by Imperial College, London has shown that the efficiency of a solar panel can be improved by studding the light-receiving semiconductor surface with aluminum nanocylinders similar to the ridges on Lego blocks. The scattered light then travels along a longer path in the semiconductor which means that more photons can be absorbed and converted into current. Although these nanocylinders have been used previously (aluminum was preceded by gold and silver), the light scattering occurred in the near infrared region and visible light was absorbed strongly. Aluminum was found to have absorbed the ultraviolet part of the spectrum, while the visible and near infrared parts of the spectrum were found to be scattered by the aluminum surface. This, the research argued, could bring down the cost significantly and improve the efficiency as aluminum is more abundant and less costly than gold and silver. The research also noted that the increase in current makes thinner film solar panels technically feasible without "compromising power conversion efficiencies, thus reducing material consumption".[5]

CNBM Poly Solar Panel 300W A Grade with Factory Price





Large solar power plant

Distributed plant

Product Feature

1.A grade high efficiency solar cells. 
2.TUV/UL/CE/CEC etc 
3.Fast shippment 
4.25 years warranty 



24pcs into one carton, 312pcs into a 20 foot container, 728pcs into a 40 foot container.

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Q:How Much Do BP Solar Panels Cost In The Wholesale US Market?
Wholesale prices for BP solar panels range between $335 for the 40 watts panel to $835 for the 70 watts panel. Here's a brief listing of wholesale prices for BP solar models: - BP340J solar panel (40 watts) @ $335 - BP350J solar panel (50 watts) @ $37 - BP375J solar panel (80 watts) @ $504 Right now I'm getting a series of 50 watt (7.5 volts) panels installed in my house. It's a start to reduce dependence on electricity bills and try get some tax rebates as well.
Q:environmental benefit of solar panels?
The social earnings is that with photograph voltaic panels they help decrease pollution that fouls the air that the ordinary public breath and it will supply up/decrease killing human beings for the supplies used now (oil gasoline) and likewise social is they gained't could dig in those risky mines for coal, which would be a social earnings. Economically it is going to pay off in the money sooner or later once you pay-off for installation them. Environmentally they help with removing pollution from the different supplies (coal, oil gasoline) additionally nuclear potential is barely stable for potential, yet commit it to memory remains turns right into a waste which will exchange right into a pollutant.
Q:installing solar panels on roof?
Go This is the web site for the magazine Homepower. You should probably get a copy of the magazine and have a look (there is a Free Sample Issue botton on the site). It contains articles about real people and their solar collectors. It usually details what kind of system they have and provides an illustration of the different parts. These articles and illustrations are very helpful to people who are new to the topic. They also have articles on things are far ranging as the national electrical codes for solar electric panels, building your own electric car and solar ovens for cooking. Check the site out and then request a free magazine.
Q:Why are solar panels effected by operating temperature?
Absolutely temperature matters. So what do higher temperatures do to solar photovoltaic panels? As temperatures rise, the efficiency of solar panels decreases. Heat causes electrical resistance to the flow of electrons. On days where the temperature is more than 75 degrees, the electrical resistance makes the voltage fall thereby producing less kilowatts per hour. Your roof is much hotter than temperatures on the ground. That’s why solar panels are not mounted flat to a roof. There’s usually a few inches of spaces between the panels and roof so air flow can easily pass through and cool the panels down. There are some photovoltaic panels that are designed specifically to operate in hotter temperatures. These panels have a higher temperature coefficient. This is especially important in high heat climates like Arizona or New Mexico, but probably wouldn’t make too much of a difference in New England (except maybe this year). If someone lives in one of these areas, they should speak to a solar installer to make sure they are using they right equipment for their region. Please note: Solar thermal panels used to heat water can withstand high temperatures without any degradation. In fact, hotter temperatures would actually be better for these types of modules.
Q:Need help with a solar panel?
In order: .  Just about any wire will do.  You can handle 50 mA over just about anything, even 28 gauge telephone wire.  Your biggest problems are probably going to be mechanical stress (you want stranded wire instead of solid, to avoid breakage) and dealing with the size of larger wires. 8 gauge speaker wire may be a good optimum. 2.  You need a diode.  If you're charging NiMH or NiCd cells you're going to have about .25 volts/cell; you can charge up to 3 of them in series with a 4.8 volt panel.  The solar panel is a bunch of diodes itself, but they're leaky in the reverse direction; the diode prevents the batteries from discharging themselves back through the panel.  You want a Schottky-barrier diode, because the forward voltage drop is about 0.2 volts instead of 0.7 volts for a regular silicon rectifier.  This gives you maximum current output from your panel.
Q:Help with Home Solar Panel System?
And at what tilt? Are there trees, poles, or buildings that cast a shadow on the roof at any time? Is the space clear of vent pipes (these can be moved, but it's extra work and cost)? Probably your best move is to contact a solar installer, and get a free quote on a system. Have them quote a system that you own, not a lease. They will do an analysis of your home, which will be very valuable even if you decide not to use a professional. If there are no professional installers in your area, that's an indication that your area may not be good for solar.
Q:How many solar panels do we need to power the US?
50 billion panels million acres nukes are better. MIKE
Q:Where to get or find information on solar panels?
Let your fingers do the work and look up a solar company in your phone book. If and when you find one consider a thermosiphon solar hot water heater. The cost is dependent on the number of people using it.
Q:Can you make a Solar Panel Heater?
Short answer is yes. Good to start out a large tank, or big rock to mount your collectors on. Something the stock won't eat or push over. I would start with a swimming pool solar collector. It is just a big piece of black plastic aimed at the winter sun. A collector with insulation and covers will give more heat per sq foot and cost more. Big mirrors and a black painted stock tank might be enough. Insulation of the tank might help a lot. Is the water liquid when pumped up the tank? Do you truck the water in? Is there any electric power wired there or near by? Electric solar collectors can pump and heat water and charge batteries, but it is also possible to circulate water using a thermosyphon set up. You don't have to use photocells. If it gets cold enough some collectors can freeze solid and damage themselves. There are collectors that contain two loops one water the other antifreeze.
Q:Should we subsidize solar panels?
Recent investments into solar panels have brought about a couple of interesting realizations and developments. One, as you state, is that traditional solar panels (silicon crystalline panels) are not currently cost effective, even will full-scale manufacturing production. It's possible that improved manufacturing techniques will bring the retail price down somewhat, but it needs to be brought down a lot to make economic sense without incentives. The other, though, is that a new method of producing solar panels - thin film technologies - has been developed. These are currently quite expensive, but because there are no crystals to grow, they are expected to drop significantly in price as production increases. I believe that this technological development has been made as a direct result of government support for solar energy. It is not taking money away from research - rather it is providing the incentive for research. I could be wrong. I've been wrong before. But I think that these new solar technologies, which are already hitting the market, will dramatically change the economics of solar energy.

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