Poly 290W Solar Panel with High Efficiency

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Shanghai
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100 watt
Supply Capability:
10000 watt/month

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Item specifice:

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

Product Description:

Poly 290W Solar Panel with High Efficiency

Product Description

Produt name: 290W Poly Crystalline Solar Panel


Poly 290W Solar Panel
Specs

Electrical Characteristics
Maximum Power [Pmax]290W
Power Tolerance+/-3%
Maximum Power Voltage [Vmp]35.80V
Maximum Power Current [Imp]8.11A
Short-Circuit Current [Isc]8.65A
Open-Circuit Voltage [Voc]44.5V
Module Efficiency14.95%
Max. System Voltage1000VDC
Cell Size and SeriesPoly 156*156  72pcs (6*12)
Temperature Coefficient of Pmax- 0.47% / º C
Temperature Coefficient of Voc- 0.33% / º C
Temperature Coefficient of Isc0.05% / º C
Mechanical Characteristics
Dimension (mm)1956*992*45
FrameAnodized Aluminium Alloy
Glass3.2mm,High Transmission,Tempered Glass
Junction box & CableIP65 Rated weatherproof connectors
Cable: TUV 1x4.0mm2 / UL12AWG,Length:900mm
Weight22.0Kgs


Industry-leading Warranty:
Warranty on material and workmanship: 10 years
Guaranteed output of 90% after 12 years and 80% after 25 years.

Why Us?
1. We will always be there for any complaints!
   We has >20 years existence period and has other business. 
2. Wide Product Range
    Solar Panels 5W - 315W Customized & Standard
3. Imported Quality Silicon
    From Malaysia, Taiwan and Switzland.
4. Competitive prices
5. Great potentials in development with Clients.

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Q:How can you get affordable Solar Panels?
you okorder.com. all you have to do is watch the video.
Q:i have three 30 watt solar panel and 6 battery cells of 2 volts 550AH. but my batteries are never fully charg?
Wow I think that your battery are too big or in othercase your solar system panels are too small. But making some calcs if you connect your panels in parallel you will have 30 Amps of Recharge for your batteries. Assuming that your batteries are discharged to .75 V/C you will need at least (. x Ah removed)/Recharge Amps = (. x 550Ah)/30A, that means that you will need 20 Hours to recharge your batteries Literally this is imposible to have fully charged your batteries for a proper application you will need 65 Amps from your panels to recharge your batts in 4 hours or de-rate your batteries to 00 Ah
Q:how to make your own solar panels?
For okorder.com/
Q:How many Solar Panels do I need?
Everyday I use ,280 kWh 280 kW-hour / 24 hours = 470 kW WOW, that is a very high power level, most homes use an average of .2 kW. My guess is that you mean you use 280 kW-hour in a year, which comes to an average power of .3 kW, typical. Assuming you get, worse case, 6 hours of sun per day, for the first case, 470 kW, each solar panel generates the equivalent of 250 x6/24 = 60 watts, so you would need 470k/60 = 8000 panels For the second case, .3 kw or 300 watts, divided by 60 that is about 20 panels. Depending on where you live, you could need as much as twice that number. Plus you need charge controller, lots of expensive batteries, and an inverter. The big problem is periods of no sun. If you demand continuous power, and you have a period of, say, 24 hours with no sun because of storms, etc, then the number of batteries increases to the hundreds.
Q:Why do solar panels stop working?
Panel degradation can occur in many ways, but they generally take a long time (40yr old panels are still working...). One problem is diffusion. Since the cells are at a finite temperature and receive energy from the light, atoms in the structure can migrate around the cell. If you mix up materials from either side of the junction, you can reduce or remove the internal field and so charge separation no longer occurs, meaning no more current output. This is generally a very, very slow process. My current research is on the back contacts of cadmium-telluride solar cells. CdTe forms a junction with metals, and this junction has a built in electric field that tries to stop the current going out of the cell. This is bad! It reduces the power you get out. To overcome this, copper is sometimes added. This really cuts down on the restrictions on current, but copper is very diffusive. Within weeks at room temperature it can jiggle its way along grain boundaries (the solar cells aren't one big crystal, but a load of small grains. Our lab makes ones about 0.006mm across). Whilst copper at the back contact is good because it cancels out the effect of the field there, once it gets to the cell junction it has a worse effect. It can act as a 'recombination centre' or 'shunting pathway' - it either absorbs the free charges or takes them somewhere useless and cuts the power output. Copper is a very obvious and quick acting cause of solar panels reducing in output. I believe a similar effect is true for other cells, just with different materials. The quality of the junction degrades slowly as heat and light give energy to atoms in the lattice and make them jiggle around a bit. Once you have things out of place, performance degrades.
Q:Solar panel experiment ?
Acciona of Spain is actively conducting research in all sorts of alternative energy. I understand they have an experimental solar farm someplace in the desert southwest of the U.S. that is made up of 283,000 panels. I don't know the size of the panels or anything else about the project other than that. 50 years ago it would have been the U.S. conducting leading research in solar energy-especially in the U.S. Southwest.
Q:How much energy does this particular solar panel produce?
Some great answers 23 max watts is per hour I live in an area that has 5.5 average sun hours per the solar insolation data which would give me a base of 676 watts produced per day for one panel. That 23 watts is most likely STC or standard test conditions which is far from standard it is ideal 70 degrees Farenheit with a 000 set flash PTC or physical test conditions are not always on labels and are not always accurate because of varied conditions. Heat has a huge factor on PV production. The panels should be derated by for the following reason ampacity correction or line loss Temperature correction PTC correction Inverter loss these corrections account for about 5 % on standard panels Our 676 watts per day has been dropped to 574 watts per day per panel Lets start with the light bulb. a standard 60 watt bulb uses 60 watts per hour. With the one panel we have chosen it would produce 5 hours and 45 minutes of illumination If we switch to a 5w CFL we get 38 and one half hours of illumination quite a difference yes Central Air will use about 2000 to 2500 watts per hour.This rule is not hard and fast as units will vary as well as conditions Lets use 2000 per hour times 8 hours of use is 6,000 watts we need 28 panels just for the ac. Probably another 28 for the rest of the house Of course these panel must be true south at 5 degrees mounted With a years worth of electric bills and a site visit I could come allot closer but lets say you need 60 of these panels this system would provide 973kHw per month at my location of 5.5 sun hours per day This would be a grid tied system as most state rebates require a grid tied system to qualify for rebates
Q:how much money do solar panels cost?
In the US, the average electric cost $.5/kw-hr. $2500 means you are using 6700 Kw-hr/month or 550 kw-hr/day. Since solar panel only make peak kw for about 5 hours per day (in sunny places like (AZ) you will need a 0 kw system. Solar systems cost about $7/watt so your system will cost about $750,000. The government my pay for about $250,000, so be prepared to spend one half a million dollars. You will also spend about $250/month on maintenance of the system. The system will lose about %/year of it's efficiency, so the system will be paid for in 240 months, or 20 years. With in 5 years after the system is paid for, they will have to be replaced, the cost will be another 2 million dollars.
Q:New Prius; Solar panles a good design?
The solar panels run the fan to remove hot air from the car. They do about the same amount of cooling that cracking the windows and using a heatshield over the windshield--that is they keep the interior of the car about the same as the exterior without draining the 2V battery. One problem I have with the solar panels is that they come with a moonroof. The other problem I have with them is that to get them you have to give up the additional safety features because Toyota won't put both the high tech safety features and the solar panels on the same car. So is it a good design? Well, nothing with a sun/moonroof is a good design IMHO, but that's the power of advertising for you. In that it runs a fan without draining the 2V battery, yes that part's good. Having to give up the high tech safety features to get it makes it a non-starter for me (and I live where it gets plenty hot so I could really use the fan).
Q:What is the most efficient solar panel?
Of okorder.com/... , and shop the web for the best panels for yourself. p.s. I'd avoid amorphous silicon panels. They may be cheap, but they'll go bad or seriously degrade in just a few years. p.p.s. I'd also avoid internet guides that claim you can make your own panels very cheaply, if you'll just pay them $$ for the information. Those guides don't live up to their advertising.

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