• 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:What is the role of grounding systems in solar cell systems?
The role of grounding systems in solar cell systems is to provide a safe and efficient pathway for the dissipation of electrical faults and to protect the system from electrical surges and lightning strikes. Grounding systems help minimize the risk of electrical shock, equipment damage, and fire hazards by establishing a connection to the earth, allowing excess electrical energy to be safely redirected and dispersed.
Q:Can solar cells be used in remote areas?
Yes, solar cells can be used in remote areas. Solar energy is a viable solution for providing electricity to remote areas that are not connected to the main power grid. Solar cells are easy to install and require minimal maintenance, making them a practical and sustainable option for generating electricity in remote locations.
Q:What is the working principle of a solar cell?
A solar cell is a solid-state electrical device (p-n junction) that converts the energy of light directly into electricity (DC) using the photovoltaic effect.
Q:How efficient are solar cells?
Solar cells are highly efficient in converting sunlight into electricity, with most commercially available solar panels having an efficiency range of 15% to 20%. However, research and development efforts are ongoing to improve the efficiency of solar cells, with some experimental cells already reaching efficiencies above 40%.
Q:What is the impact of hurricane-force winds on solar cell efficiency?
The impact of hurricane-force winds on solar cell efficiency can be significant. Strong winds can cause physical damage to the solar panels, such as cracks or detachment, which can reduce their ability to generate electricity. Additionally, debris carried by the winds may also damage the panels, further decreasing their efficiency. Therefore, it is crucial to ensure proper installation and structural resilience to mitigate the negative effects of hurricane-force winds on solar cell efficiency.
Q:Can solar cells be used in hot climates?
Yes, solar cells can be used in hot climates. In fact, solar cells are more efficient in hot climates due to increased sunlight and higher temperatures, which can enhance their overall performance. However, it is important to consider proper maintenance and cooling mechanisms to prevent any potential damage or decrease in efficiency caused by excessive heat.
Q:How do solar cells handle lightning strikes or electrical surges?
Solar cells do not have built-in protection against lightning strikes or electrical surges. However, they are usually connected to a surge protection device or a lightning arrestor to divert the excessive current away from the solar panel system. This helps to minimize the risk of damage to the solar cells and associated equipment.
Q:How much land is required to install solar cells?
The amount of land required to install solar cells varies depending on various factors such as the type and efficiency of the solar panels, the amount of electricity desired, and local conditions. On average, it is estimated that 1 megawatt (MW) of solar power requires approximately 5-10 acres of land. However, advancements in solar technology have led to the development of more efficient panels, reducing the land footprint needed for installation. Additionally, innovative approaches like rooftop solar panels can utilize existing structures, minimizing the need for additional land.
Q:Are solar cells affected by shade?
Yes, solar cells are affected by shade. Shade can significantly reduce the efficiency and output of solar cells. When solar cells are shaded, they receive less sunlight, which reduces the amount of energy they can convert into electricity. Therefore, it is important to ensure that solar panels are installed in a location where they receive maximum sunlight exposure throughout the day for optimal performance.
Q:Can solar cells be used for wireless communication devices?
Yes, solar cells can be used for wireless communication devices. Solar cells can generate electricity from sunlight, which can then be used to power various electronic devices, including wireless communication devices such as smartphones, tablets, and wireless routers. This allows for the possibility of harnessing solar energy to power these devices, making them more sustainable and independent from traditional power sources.

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