CNBM Poly Solar Panel 290W A Grade with Factory Price

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Item specifice:

Material: Polycrystalline Silicon Max. Power(W): 290 Number of Cells(pieces): 72

Product Description:

CNBM Poly Solar Panel 290W 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.

A photovoltaic (in short PV) module is a packaged, connected assembly of typically 6×10 solar cells. Solar Photovoltaic panels constitute the solar array of a photovoltaic system that generates and supplies solar electricityin commercial and residential applications. 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.

CNBM Poly Solar Panel 290W 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:have you ever installed solar panels for your home?
Yes I have. We have a little Labrador on the front steps(you know, a thing to hide keys under.) In his mouth is a little lantern that absorbs the solar energy from the panels and it turns on at night. Really saves you money, much more than regular electricity. The bill won't be so high this way, oh, and it's also good for the environment����
Q:Questions about solar panels?
I can begin to point you in the right direction. It is a very complicated thing you are asking about. Solar panels produce direct current, in order to store that power for use at night, and on cloudy days, you need a lot of batteries. Those batteries store direct current. In order to use that direct current to power your refrigerator, you need to put it through a thing called an inverter. The inverter produces AC from DC. You may have seen one for sale to plug into the lighter in a car so you can use things that require AC in your car. The inverter looses power doing the conversion. Over time, you can purchase direct current appliances, and make the system more efficient. Years ago, a decision was made to go with AC because of transmission issues (you can move AC across a wire a long distance, and DC is more difficult to move). Many appliances convert AC to DC internally to do their work, but such appliances are expensive. Have I answered your question? Not really. You should understand your question better though.
Q:Why are solar panels only 0% efficient?
Sunlight comes in many frequencies, that's why it's white. Solar Photovoltaics require a photon to displace an electron from a semiconductor and that only happens at one frequency depending on what the semiconductor material is, therefore only one exact frequency gets turned into power. They are working on using organic dyes or quantum dots to absorb the energy in different frequencies and re-emit the energy in the desired frequency. They also are working on using multiple semiconductor materials to try and capture more frequencies. The rest of the energy becomes heat which also reduces the efficiency of the solar cells. The lab record for solar photovoltaics is 42.8% efficiency and quantum dots promises to be 65% to 75% efficient. Keep in mind that fossil fuels are based on energy collected by photosynthesis over millions of years. The efficiency of photosynthesis with modern plants is about 0.5% and the theoretical maximum efficiency of photosynthesis is 6.6%. All of our current energy use is based upon a small fraction of 0.5% efficiency over millions of years.
Q:Why are solar panels placed on the roof of houses?
Solar panels are placed on the roof because many times the roof has good exposure to the sun providing the roof is not blocked by trees or something else so that sufficient sunlight wouldn't be absorbed. Also the panels would more likely not get damaged on the roof opposed to being in the yard. If they were mounted on the windows, how could you see? And, the windows could easily break and then what would happen to the panels? Placing the solar panels on the floor would not be practical. A lot of sunlight is needed for the cells to produce electricity and how much goes on the floor? Most roofs are at an angle which could perhaps improve the amount of sunlight the panels would get, and roofs provide a lot of unused space. The roof is the best place. Furthermore, roof solar panels are available now to blend in better with the roof so that they are more pleasing to the eye. Even if you have a small roof, some panels could be placed there provided the roof is not blocked so that the sunlight it gets would be sufficient (about 4 or 5 hours of sunlight a day is needed). And, if you needed addition panels, they could be mounted in your yard as long as the mount was close to your power box and received sufficient sunlight. I applaud your desire to use solar panels. You could possibly save 50 - 90% on your electric bill and help your environment at the same time! A Win - Win situation!!
Q:rooftop pool solar panel leaks?
Depending on the material and operating temperature of the panel, it MAY be possible to fix it very simply and easily by applying Hot Glue Gun adhesive over the cracked area. The high temperature glue gun adhesive melts at approximately 60 degrees Farenheit, and if the collector temperature does not quite reach, or exceed that operating temperature, then that repair method should work. Another possibility is an aerosol spray can product called LeakEnder. This is usually available at your local hardware store, or the major home improvement centers [like Lowe's, Sutherland's, Home Depot, McCoy's, etc.]. After preparing the area to be patched by cleaning, you just spray the LeakEnder patching material on the crack and an eighth of an inch or so around. IF the operating pressure or the collector is very low, it MAY even be possible to patch the leak with nothing more than a narrow strip of DUCT TAPE!!!!! Another possibility, but unless carefully accomplished is to weld the crack with a Soldering Gun and some scrap plastic from packaging material. The problem with this fix is that you must be very experienced in application of heat from the Soldering Gun, OR you will melt a larger hole in the collector tube than the crack was. Regardless of patching method, it is CRITICAL that the cracked area to be patched MUST be CLEAN and DRY BEFORE applying any patching material. Good luck!
Q:Solar Panel Watts?? help!?
Watts is a measurement of power which is a combination of Voltage x Amps Example: a 200 Watt panel can produce 6.6 amps at 2 Volts. (200 = 2 x 6.6) If you bought a 24 volt system the same 200 Watts would give you half the amount of amps since the power (watts) is the same. When determining your needs for a solar system there are many factors that have to be taken into account. The amount of power you use will depend on what appliances you have in the house, how much you use them, and how careful you are with vampire loads (A TV or stereo will use some power even when turned off unless you unplug them). The amount of panels you need will also depend on your battery system, amount of sunlight that you have in a day and how many days of reserve power you think you will need based on the weather in your area. If you wanted to completely run your house on solar energy you are looking at an investment of $5,000 - $20,000 or even more. There sometimes are tax incentive depending on where you live that will reduce your overall cost. Some examples of power usage: Toaster : 800-500W Microwave : 600-500W Dishwasher : 200-500W Washing Machine : 500W Vacuum Cleaner : 200-700W Iron : 000W Clothes dryer : 4000W Ceiling Fan : 0-50W Table Fan : 0-25W Electric Blanket : 200W Hair Blow dryer : 000W Electric Shaver : 5W Laptop Computer : 20-50W Desktop Computer : 80-50W TV (9 colour) : 70W Clock radio : W Fridge / Freezer : 500W 25 colour TV : 50W Electric Kettle : 2000W
Q:I need a lightweight form fitting solar panel with the best power potential?
Q:how do i build a solar electric panel for my home?
Solar energy is very expensive. Or I should say, solar panels are expensive, because once you install them the power is free. A typical residential solar power system that supplies around a kilowatt of power at best conditions (noon, sunny day) will cost about $0,000. This includes the solar panel, the inverter (converts DC into AC), the cabling, but not installation (that would probably run you another $2000). One kilowatt is not that much electricity. It would run one microwave oven, or one hair dryer, or 0 light bulbs, and nothing else. Most houses use 3 times that at peak hours. So you would still likely get some power off the grid at peak time, and other times you can sell it back to make a little money. The good news is that solar panels are getting cheaper. They are around $5 per watt now, and are projected to drop to half that in the next decade. At some point, it will reach the sweet spot that makes solar an attractive alternative to grid power and more people will jump on board. There are some tax incentives too, but more would certainly help.
Q:how many solar panels will i need?
you silly ! with Solar there is always room for error . you have to build it in to your numbers . solar is full of errors . So you should plan on producing at 3 times what you expect you will need . then you have enough .
Q:Why aren't electronics made with solar panels?
Well if these things come up with the solar panel than no one can easily but it even run it because solar panels need constant light energy from the sun which consumes in their resources equipment. By the way these are very small things we should think about big like electricity generation still done by coal which is main reason for spreading pollution but now USA is planting solar panel plant which will help to reduce pollution and saving bills money.

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