• 250 Watt Photovoltaic Poly Solar Panel supplier System 1
  • 250 Watt Photovoltaic Poly Solar Panel supplier System 2
250 Watt Photovoltaic Poly Solar Panel supplier

250 Watt Photovoltaic Poly Solar Panel supplier

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Loading Port:
China main port
Payment Terms:
TT or LC
Min Order Qty:
1000 watt
Supply Capability:
500000 watt/month

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Item specifice

Material:
Polycrystalline Silicon
Max. Power(W):
250
Number of Cells(pieces):
60

Instruction

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  

5.3w-300w mono & poly solar panel supply

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

   

Feature

1. High efficiency and High power.

2. Long-term electrical stability.

3. Lowest price and Fastest delivery.

4. Good quality and good service.

5.Bulk supply

6. Good Warranty

7.Big Sale

8.High quality

9.More than 35 years on the lifetime.

10 DHL/Fedex/UPS/TNT/EMS etc

 

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250 Watt Photovoltaic Poly Solar Panel supplier

250 Watt Photovoltaic Poly Solar Panel supplier

Specification

 

Model

SIM-100

Maximum Power at ST(Pmax)W

100Wp

Maximum Power Voltage(Vmp)V

18.0V

Maximum Power Current(Imp)A

5.56A

Open Circuit Voltage(Voc)V

22.0V

Short Circuit Current(Isc)A

5.9A

Cell Efficiency(%)

17.0%

Module Efficiency(%)

15.37%

Operating Temperature°C

-40°C to    85°C

Maximum system voltage

1000V(IEC)DC

Power tolerance

-0.03

Temperature coefficients of Pmax

-0.45%/°C

Temperature coefficients of Voc

-0.27%/°C

Temperature coefficients of Isc

0.05%/°C

Weight(kg)

7.4

Number of cell(pcs)

4*9

 

FAQ

We have organized several common questions for our clients,may help you sincerely:

1). What’s price per watt?

A: It’s depends on the quantity, delivery date and payment terms of the order. We can talk further about the detail price issue. Our products is high quality with lower price level.

2). Can you tell me the parameter of your solar panels?

We have different series of cells with different power output, both from c-si to a-si. Please take our specification sheet for your reference.

3). 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.

4). How long can we receive the product after purchase?

In the purchase of product within three working days, We will arrange the factory delivery as soon as possible. The perfect time of receiving is related to the state and position of customers. Commonly 7 to 10 working days can be served.


How do solar cells work?

A solar cell is a sandwich of n-type silicon (blue) and p-type silicon (red). It generates electricity by using sunlight to make electrons hop across the junction between the different flavors of silicon:

  1. When sunlight shines on the cell, photons (light particles) bombard the upper surface.

  2. The photons (yellow blobs) carry their energy down through the cell.

  3. The photons give up their energy to electrons (green blobs) in the lower, p-type layer.

  4. The electrons use this energy to jump across the barrier into the upper, n-type layer and escape out into the circuit.

  5. Flowing around the circuit, the electrons make the lamp light up.

 Principles of  the  working about solar  cells

 Solar cells convert the sun’s energy into electricity. Whether they’re adorning your calculator or orbiting our planet on satellites, they rely on the the photoelectric effect: the ability of matter to emit electrons when a light is shone on it.

Silicon is what is known as a semi-conductor, meaning that it shares some of the properties of metals and some of those of an electrical insulator, making it a key ingredient in solar cells. Let’s take a closer look at what happens when the sun shines onto a solar cell.

Sunlight is composed of miniscule particles called 
photons, which radiate from the sun. As these hit the silicon atoms of the solar cell, they transfer their energy to loose electrons, knocking them clean off the atoms. The photons could be compared to the white ball in a game of pool, which passes on its energy to the coloured balls it strikes.

Freeing up electrons is however only half the work of a solar cell: it then needs to herd these stray electrons into an electric current. This involves creating an electrical imbalance within the cell, which acts a bit like a slope down which the electrons will flow in the same direction.

Creating this imbalance is made possible by the internal organisation of silicon. Silicon atoms are arranged together in a tightly bound structure. By squeezing small quantities of other elements into this structure, two different types of silicon are created: n-type, which has spare electrons, and p-type, which is missing electrons, leaving ‘holes’ in their place. 

When these two materials are placed side by side inside a solar cell, the n-type silicon’s spare electrons jump over to fill the gaps in the p-type silicon. This means that the n-type silicon becomes positively charged, and the p-type silicon is negatively charged, creating an electric field across the cell. Because silicon is a semi-conductor, it can act like an insulator, maintaining this imbalance.

As the photons smash the electrons off the silicon atoms, this field drives them along in an orderly manner, providing the electric current to power calculators, satellites and everything in between.

Q:How are solar cells manufactured?
Solar cells are manufactured through a multi-step process that involves the production of silicon wafers, the creation of a p-n junction, the addition of anti-reflective coatings, and the assembly of electrical contacts.
Q:Is that true that the price of solar cells will be reduced in the coming year?
It is very possibile that that solar cells' price will go down this year because there were many orders last year, either from European or China market. The solar cells are actually very sustainable. Once you buy it, you can use it for years. With the falling demand the price of course will go down.
Q:Is the solar cells factory in China good and trustworthy?
We are a foreign company selling the solar cells all over the world, we actually set up our solar cell factory in China 5 years ago, and it turns out to be very good.
Q:Can solar cells be used for powering transportation infrastructure?
Yes, solar cells can be used for powering transportation infrastructure. Solar-powered electric vehicles, such as solar cars, solar buses, and solar trains, are already being developed and deployed in various parts of the world. Additionally, solar energy can also be used to provide power for charging stations and electric vehicle infrastructure, reducing reliance on traditional energy sources and promoting sustainability in transportation.
Q:How do solar cells perform in areas with limited sunlight?
Solar cells do not perform as efficiently in areas with limited sunlight, as their energy production is directly dependent on the amount of sunlight available. However, advancements in solar cell technology have improved their ability to generate electricity even in low light conditions.
Q:Can solar cells be used in traffic management systems?
Yes, solar cells can be used in traffic management systems. Solar cells are a renewable and sustainable source of energy that can provide power for traffic lights, road signs, surveillance cameras, and other equipment used in traffic management systems. By relying on solar energy, these systems can reduce their carbon footprint and decrease dependency on grid electricity.
Q:How much maintenance do solar cells require?
Solar cells require very little maintenance. They are designed to be durable and can last for several decades with minimal upkeep. Routine maintenance typically involves cleaning the surface of the solar panels to ensure optimal sunlight absorption and occasionally checking for any damage or debris. Overall, solar cells are a low-maintenance energy solution.
Q:Briefly explain why solar cells are made into components
Components are made in order to better protect the crystalline silicon material is not destroyed, the components generally by the tempered glass, EVA, battery, TPT, aluminum frame and other materials, so that the components, the service life of up to 20 years The
Q:How do solar cells handle partial shading?
Solar cells are designed to handle partial shading by utilizing bypass diodes. These diodes allow the current to bypass the shaded cells, ensuring that the unshaded cells continue to generate power. This helps to minimize the impact of shading on the overall efficiency of the solar panel.
Q:What is the role of solar cells in powering streetlights?
The role of solar cells in powering streetlights is to harness sunlight and convert it into electricity. This electricity is then stored in batteries, which are used to power the streetlights during nighttime or when there is not enough sunlight available. Solar cells enable streetlights to operate independently from the electrical grid, reducing energy costs and environmental impact.

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