250watt Crystalline Solar Panels for Rooftop Systems

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78000 watt
Supply Capability:
10000000 watt/month

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Product Description:

CNBM 250watt Crystalline Solar Panels for Rooftop Systems

250watt Crystalline Solar Panels for Rooftop Systems

Specifications:


Solar panel refers either to a photovoltaic (PV) module, a solar hot water panel, or to a set of solar photovoltaic modules electrically connected and mounted on a supporting structure. A PV module is a packaged, connected assembly of solar cells. Solar panels can be used as a component of a larger photovoltaic system to generate and supply electricity in commercial and residential applications. Each module is rated by its DC output power under standard test conditions, and typically ranges from 100 to 320 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. There are a few solar panels available that are exceeding 19% efficiency. A single solar module can produce only a limited amount of power; most installations contain multiple modules. A photovoltaic system typically includes a panel or an array of solar modules, an inverter, and sometimes a battery and/or solar tracker and interconnection wiring.


solar panels from 5W--300W, made of TAIWAN MOTECH brand cells,with CO in TAIWAN,Mono and Poly with VDE,IEC,CSA,UL,CE,ISO.

We import solar cells from Taiwan Motech brand, with this CO in taiwan and our CSA certification,we can still sell goods to Anti-dumping areas like USA. Our main products are solar panels, off grid and on grid solar home systems , solar street lighting systems, solar water heating system,solar pump,solar attic fan, solar DC LED lights and solar DC refrigerators.

Certificates : ISO, CE, VDE IEC, MCS, CSA-UL, CEC.
Delivery time: sample 10days, order 25-30days.
Sample: charged.
Payment term: T/T 30% as deposit, 70% before shipment. Or irrevocable L/C at sight.
Trade term: FOB Shenzhen or CIF destination seaport or Airport.

Characteristics:

I.Solar Cell : High efficiency crystalline solar cell. Even if under the weak light, the solar module can produce maximum power output.
II.Tempered glass (toughened glass): Anti-reflecting coating and high transmission rate glass increase the power output and mechanical strength of solar module.
III.EVA and TPT: Using high quality EVA and TPT to prevent destroying and water.
IV.AI frame: Without screw, corner connection. 6 holes on the frame can be installed easily.
V.Junction box: Multi function junction box with water proof.
VI.Long lifetime:
25 years; Less power decrease.
VII.Good performance of preventing from atrocious weather such as wind and hails.
VIII.Resisting moisture and etching effectively, not effected by geology.
IX.The certificate issued by international authority: UL, TUV, IEC, VDE, CE.
 

Quality and Safety

1. Rigorous quality control meets the highest international standards.

2. High-transmissivity low-iron tempered glass, strong aluminium frame.

3. Using UV-resistant silicon.

4. IS09001/14001/CE/TUV/UL  

Warranties

1. 10 years limited product warranty

2. 15 years at 90% of the minimal rated power output

3. 25 years at 80% of the minimal rated power output

Technical date :

ITEM NO.:

Poly 156*156 cell ,60pcs . Power range from   230Wp-260Wp

Maximum Power(W)

230

235

240

245

250

255

260

Optimum Power Voltage(Vmp)

29.4

29.5

29.7

30.1

30.3

30.5

30.7

Optimum Operatige Current(Imp)

7.83

7.97

8.08

8.14

8.25

8.37

8.48

Open Circuit Voltage(Voc)

36.7

36.8

36.9

37.1

37.3

37.5

37.7

Short Circuit Current(Isc)

8.52

8.59

8.62

8.65

8.69

8.73

8.78

Solar Cell:

156*156 Poly

Number of Cell(pcs)

6*10

Name of Solar Cells

Polycrystalline Cell

Size of Module(mm)

1650*992*40/45/50

Cable & Connector Type

Pass the TUV Certificate

Frame(Material Corners,etc.)

Aluminium-alloy

Back sheet

TPT

Weight Per Piece(KG)

19.5KG

FF (%)

70-76%

Junction Box Type

Pass the TUV Certificate

Tolerance Wattage(e.g.+/-5%)

±3%, or 0-3%

Front Glass Thickness(mm)

3.2

Temperature Coefficients of Isc(%)

+0.04

Temperature Coefficients of Voc(%)

-0.38

Temperature Coefficients of Pm(%)

-0.47

Temperature Coefficients of Im(%)

+0.04

Temperature Coefficients of Vm(%)

-0.38

Temperature Range

-40°C to +85°C

Surface Maximum Load Capacity

5400Pa

Allowable Hail Load

23m/s ,7.53g

Bypass Diode Rating(A)

12

Warranty

90% of 10 years, 80% of 25 years.

Standard Test Conditions

AM1.5   1000W/ 25 +/-2°C

Packing

carton or pallet

1*20'

14 Pallets / 316pcs

1*40'STD

25 Pallets / 700pcs

 

FAQ:


I..Will you focus on the safety of the goods during transportation?

Yes, Safety of the cargo is the primary element that we would consider on transportation.

II..How would guarantee the quality will meet the requirements of your clients?

Before shipment, we will have inspection for each batch of goods.

III..What certificates do you have?

IEC,UL,TUV,CSA,etc.

IV..Can you do OEM according to clients’ requirements?

Yes, we have our own brand while we can provide OEM service.


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Q:Solar panel angle question..?
2.20 approximatey (2 /4 -- ish) X = (tan7)(8/tan45)
Q:Building my own solar panels?
Create okorder.com/
Q:How may solar panels/wind turbines may be made affordable?
Answered okorder.com/. They were initally so lame (and this is related to their general paranoia) that they cut deals to place the turbines before they secured corridor access to substations. Load gun, cock it, aim at foot, shoot.
Q:electronics help solar panel?
[] Use it to charge 4 pieces AA cell ( connect in series to make 5V battery pack ) for 0 to 4 hours. Good for cell rated 600mAH ,2000mAH,2500mAH. [2] Cannot increase current. Buy some more this panel and hook them together in parallel to increase current. You need at least ten pieces to make current reaches .6A to light up some 6V bulbs.
Q:Numbers behind Solar Panels?
For comparison, 36 of these make a normal 2V x 50W panel. Note they are not tabbed. This means you have to find a way to connect them yourself. The tabs are probably spot welded on by the suppliers. A supplier below has kits of these with tabs, as needed to connect them together. These are not suitable for grid connect, because the higher voltage needed makes do it yourself panels a dangerous and litigious thing to have on your roof. Maybe you could buy a smaller pack from the link below to compare tabbed and untabbed and work out what to do. Your power calculation is a bit incorrect because the sun is only present some of the time. The 36 cell module would produce 50W when square on to the full sun. The sun may be out for around 2h a day in some places and times of the year. However it is the equivalent of 5h full sun, because of the changing angle throughout the day. Look this up on the internet for your region. Temperate zones may be a lot less. One pack in your link is 36x3 = 08 cells. Thus 50W per pack x 5h a day gives 750Wh per day and 274KWh/y. In reality it will always be less because of regions, weather, clouds, dust, inefficiencies, aging of cells.
Q:is it feasible to create a solar panel that could harness more of the suns energy than what they can now?
If you're asking whether we can make more efficient solar panels, the answer is obviously yes. Solar panel efficiency has been slowly but surely increasing every year, although the theoretical limit is being approached (but has not yet quite been reached) by crystalline silicon devices.
Q:what kind of rays are used in solar panels?
Electromagnetic...meaning light rays, primarily in the visible spectrum. Ultraviolet and infrared light rays actually degrade most types of solar panels, limiting their useful lifetime. That said, your question is not stated well...so I'm not sure if that's the information you were looking for. Rays are not used in solar panels...rather solar panels are used to collect sunlight and convert it to energy--either directly into heat in the case of passive solar, or into electricity by the use of photovoltaic cells.
Q:how much do solar panels cost and r thay worth buying?
If you are looking into a credit or buy back of hydro, you should be inquiring about windpower not solar...you will have better luck creating more with that than panels. It is not so much the cost of the panels that is a lot, it is the cost of everything else you will need to use/store the power....inverter, batteries...etc
Q:Do solar panels steal sunlight from nearby plants?
not so. the sun shines on the earth and everything on it. the solar panels are on the earth like on top of your house maybe.if they were not sitting on top of your house , the sun would still be shining on your roof. it makes no sense to say they were drawing light away from other plainest when the sun would still shine on the place where they are if they were not there.
Q:Do solar panels add to global warming?
As far as it goes, you're right: putting up a big black object increases the total amount of energy absorbed from the sun. But that's only part of the story. If you didn't put up the solar panel, the same radiation would hit the earth. The earth already absorbs 2/3 or so of the energy that comes in (albedo .30), so adding even a perfectly black object increases it only by 50%. But it's not even that much, because most of the extra energy absorbed is converted into electricity. Solar panels are about 0-5% efficient, so half of the extra energy is turned into electricity rather than heat. Eventually it's put to use and turned into heat, but that heat was going to come from somewhere else anyway. (Even if it's just powering your DVD player, it turns into heat just the same as if you were using it to heat your house.) If you dig up a gallon of petroleum or fission a microgram of uranium, that's heat introduced into the earth's atmosphere. And these processes are inefficient: between generation and transmission you lose about 75% of the energy, meaning you've introduced 4 times as much energy into the atmosphere as you've actually used. So with a solar panel, you add extra heat to the earth by about 25% of incoming solar radiation, but you've offset external costs by about 45% of incoming solar radiation. The net effect is to cool the earth. And that assumes that the solar panel itself is perfectly black, which isn't the case. Real commercial solar panels have an albedo of about .35, which makes them more reflective than dirt and considerably more reflective than asphalt shingles, which have .03 albedo. In other words, even if you didn't actually use the solar panels for electricity, they'd be cooling the earth just by reflecting energy back into space more than your regular shingles.

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