275W Direct Factory Sale Price 260-300Watt Solar Panels

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China main port
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Min Order Qty:
10000 watt
Supply Capability:
100000 watt/month

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Item specifice:

Material: Polycrystalline Silicon Max. Power(W): 300 Number of Cells(pieces): 1

Product Description:

275W Direct Factory Sale Price 260-300Watt Solar Panels

275W Direct Factory Sale Price 260-300Watt Solar Panels

275W Direct Factory Sale Price 260-300Watt Solar Panels

Solar Module Introduction

Solar modules use light energy (photons) from the sun to generate electricity through the photovoltaic effect. The majority of modules use wafer-based crystalline silicon cells or thin-film cells based on cadmium telluride or silicon. The structural (load carrying) member of a module can either be the top layer or the back layer. Cells must also be protected from mechanical damage and moisture. Most solar modules are rigid, but semi-flexible ones are available, based on thin-film cells. These early solar modules were first used in space in 1958.

Electrical connections are made in series to achieve a desired output voltage and/or in parallel to provide a desired current capability. The conducting wires that take the current off the modules may contain silver, copper or other non-magnetic conductive transition metals. The cells must be connected electrically to one another and to the rest of the system. Externally, popular terrestrial usage photovoltaic modules use MC3 (older) or MC4 connectors to facilitate easy weatherproof connections to the rest of the system.




Model Type

Peak Power-Pmax(W)


Open Circuit Voltage-Voc(V)


Maximum Power Voltage-Vmp(V)


Short Circuit Current-Isc(A)


Maximum Power  Current-Imp(A) 


Maximum System Voltage

1000V DC

Maximum Series Fuse Rating


Power Tolerance


Temperature Coefficients of Pmax


Temperature Coefficients of Voc


Temperature Coefficients of Isc


Nominal Operating Cell Temperature


Standard Testing Condition(STC)


Qualification Test Parameters

Operating Temperature


Storage Temperature


Pressure Bearing


Wind Bearing


Mechanical Characteristics

Cell Size

Mono 125*125mm±0.5

No.of Cells







3.2mm High Transmission,Low Iron


Anodized Aluminum Alloy

Junction Box


Internal Diodes

3 Bypass Diodes


1*4.0mm² Length 900mm


Packing & Shipping:


We have rich experience on how to pack the panels to make sure the safety on shipment when it arrives at the destination.

The normal size is packed by 25pcs/ carton / pallet. Paper carton for FCL shipping and wood carton for LCL shipping.



1.High reliability with guaranteed -3% to +5% power output tolerance, ensuring return on investment
2.High conversion efficiency based on leading innovative photovoltaic technologies
3.Withstands high wind-pressure and snow load, and extreme temperature variations
4.Attractive appearanceUnique frame design, high mechanical strength, and easy Installation


For c-Si panel: 25years output warranty for no less than 80% of performance, 10 years output warranty for no less than  90% of performance. Free from material and workmanship defects within 5 years.

For a-Si panel: 20 years output warranty for no less than 80% of performance, 10 years output warranty for no less than 90% of performance. Free from material and workmanship defects within 2 years.


•100% product quality protection

•100% on-time shipment protection

•100% payment protection for your covered amount


1What price for each watt?

It depends on the quantity, delivery date and payment terms.

2What is your size for each module? Can you tell me the Parameter of your module?

We have different series of panels in different output, both c-Si and a-Si. Please take the specification sheet for your reference.

3Can you provide the peripheral products of the solar panels, such as the battery, controller, and inverter? If so, can you tell me how do they match each other?

Actually we are only manufacturer of solar panels, but we could try to source them for you in China if you need. We could provide you an optimal system design to instruct you how to install.

4Do you have the CE, TUV, UL Certification?

We’ve already passed all the tests, and any certificate is available.

5Have you ever sold your products to companies in my country?

Of course, we have customers in all general PV markets, but I think we should expand our market share along with the market growth.

6When did your company set up?  You are a new company, how can I believe your quality?

We entered into Solar PV industry in 2005, now we have several plants in manufacturing of a-Si and c-Si panels, and our capacity is 220MW per year. Till now we have already passed all the tests by authorized laboratories, e.g. TUV, VDE, UL.

7Can you help us install the module if we cooperate with you?

We haven’t entered into installation sector, but we have the plan in near future.

8) How do you pack your products?

We have rich experience on how to pack the panels to make sure the safety on shipment when it arrives at the destination.

 (9) Can you do OEM for us?

Yes, we can.

10Can we visit your factory?

Surely, I will arrange the trip basing on your business schedule.

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Q:How to find amp for solar panel project?
It is possible your meter does not have the capacity to safely measure more than 300 milliamps which is too small to measure current output from solar panels. Assuming no losses in the system or components, if your meter does not have the capacity to measure 0 Amps, you will need to get one that does. Analogs are better than digitial for this. Most often the 0 Amp circuit of the meter has a discrete positive plug location for the positive test lead. Most have a common ground connection with the rest of the meter functions. If you are measuring current at the battery in the charge mode- Negative lead of meter goes to positive terminal of battery and positive lead of meter goes to the cable that was connected to the positive terminal of the battery. Since the Wattage is a nominal measurement, if you measure between the panel and controller, take measurement on one leg of the panel, as you want to measure the current with the loaded active circuit. Meter is oriented the same way as the measurement at the battery would be made above only this time the meter is between the panel and controller. At peak solar conditions, expect current to be measured at 2.5 to3 Amps or more per panel. Under optimal conditions your panel will have higher output than their ratings indicate. Open circuit can be close to 20 volts. Never short circuit the output of the solar panels. It is volts multiplied by amps that gives you Watts.
Q:I need help with solar panels?
Note: he didnt buy them, we found them at a property that we bought
Q:80 watt solar panel ? what dose that mean?
You okorder.com/
Q:Maintenance of Solar Panel?
panels need full sun. any shade reduces out put. leaves left on them will cause the individual cells burn out. they nneed adjusting every season, an washed with a soft cloth once a year.
Q:Have a question about mobile homes and solar panels!!!?
I'm not an expert on solar panels.... However, if you find they are expensive, I have a suggestion for eliminating a cost for heating... look into geo-thermal heating. It's a one time fee, they basically drill into the earth and heat your home with natural heat from underground. That wouldn't supply you all your power, but could cut down on the cost of solar panels, so you could use them simply for lights etc and not heat as well.... and I'm sure it would increase your re-sale value.
Q:How can I run my house purely off of solar panels?
In my opinion you can do it. You will need to have solar panels. and batteries to store the power until needed.
Q:How much should a 00 watt solar panel cost?
that's going to run a a hundred watt gentle bulb as long because of the fact the sunlight in shining. Or in case you had 8 hours of sunlight shine on the panel stored in a battery you may get 8 hours of light at evening (if the device replace into a hundred% effective which it heavily isn't) you will get approximately 5-6 hours of light from the a hundred watt gentle bulb. In 0 hours of light you will get kwH. So if the capacity business employer can pay you $0.0 for each kwH that's going to take 60,000 hours of light to get returned you $six hundred. approximately 20-30 years.
Q:I have two ARCO M55 solar panels. What do I need to connect to a 2Volt bank of batteries.?
You can buy Solar Charger Regulators. I don't. These chargers limit the charging current to the batteries, so you do not get a full efficiency of the solar panel. They disconnect the batteries from the user side (the bulbs you use) if the battery voltage goes below a certain level (i.e. below 8V for a 2V battery), so you cannot use all the power available in the batteries, even in emergency. They introduce, at least, a 0.7V loss (diode forward voltage) between the panel and the battery. If you have SEVERAL panels and a lot of batteries, use a controller as above. If you only have one panel, insert a 5A trip fuse in line (in your case: twice the current of the panel), and a 0-20A diode in series between the panel and the batteries (Kathode side of the + of the battery, Anode side of the + of the panel). Install a voltmeter across the battery. The fuse will prevent any short or over-charge current. The diode will prevent the battery to discharge into the panel at night if it is not already protected. The voltmeter will allow you to watch the status. Your thought of limiting the voltage is useless: should the battery be low, the panel will drop its voltage, limited by the max current. Should the battery be fully charged and the solar panel at full efficiency, it will just try to charge the battery more. A bit of bubbles may result, hence the voltmeter to watch over it. If you want to limit the voltage to 4V, put a 4V Zener (4Vx2.5W!) in series with a resistor of, say, 7V-4V/2.5A or ~ Ohm, 5W, in parallel with the panel.
Q:Why should people use solar panels more for houses?
Right now, the U.S. government and some state governments (like California) are offering subsidies on solar panels for businesses and houses. With these subsidies, anyone infesting in solar power today will have their investment returned in less than 0 years. This means that with these subsidies, solar panels are basically paying for themselves; they're free. In addition, excess power generated on solar panels can be added to the local power grid and, if you're lucky and can set it up with your local power distributor, the power company will pay you for the power you generate. This are just financial reasons. Their is also the reduction of power generated by fossil fuels when using solar power which mitigates climate change.
Q:A question about Solar Panels?
Take a look on OKorder at some of the books on how to design solar energy systems. It is a bit more complicated than you might expect. I'm not sure what you consider to be a standard solar panel, but the 3' ones I have produce about 5 watts of power in full sunlight. Put simply, you need to convert the power from the solar cells (variable voltage) into a constant voltage usable for charging a batteries. Most of the low cost modules for this purpose can't handle more than about 00 watts. Larger systems are available that handle thousands of watts but they are quite pricey. Since you can't take out more than you put into your battery system, you can calculate about how long you can run a high-current appliance based upon its wattage rating, that of the battery system (adjusted for loss of converting to AC), and the charging system.

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