Factory Direct Sale: A-Grade High Efficiency 250W Poly Solar Panels

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Loading Port:
Shanghai
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TT OR LC
Min Order Qty:
5000 watt
Supply Capability:
40000000 watt/month
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Our solar cells are widely used in solar pump, solar lighting, lamps, household electricity, traffic, communication, meteorological, building and photovoltaic power plants and so on.

 

Characteristics

Max Power Voltage Vmp(V):               30.4

Max Power Current Imp(A):                 8.26

Open Circuit Voltage(V) :                       37.5

Voc(V)Short Circuit (A):                         8.88

Current Isc(A)Max Power Pm(W):      250

 

Temperature Coefficient of Cells

 

NOCT45
Temperature Coefficients of Isc(%/℃)0.04
Temperature Coefficients of Voc(%/℃)-0.34
Temperature Coefficients of Pmp(%/C)-0.42

 

Mechanical Data

Dimension1638x982x35
Weight18kg
No. of Cells and Connections60(6x10)
Tolerance0~+5W
CellPolycrystalline Cell
Packing812 Pcs/40ft(H) Container

 

Limits

Opening Temperature-40℃ to +85℃
Storage Temperature-40℃ to +85℃
Max System Voltage1000VDC(IEC)/ 600VDC(UL)

 

Guarantees

Products Guarantee12yrs free from defects in materials and workmanship
Performance GuaranteeNo less than 90% within 10yrs and no less than 80% within 25yrs
CertificatesTUV(IEC61215&IEC61730), CE

 

IV Curve

 

Q:
Yes, solar panels can be used in areas with high levels of lightning activity. However, they may be more susceptible to damage from lightning strikes compared to other structures. To mitigate this risk, proper grounding and surge protection measures should be implemented to safeguard the solar panels and associated equipment.
Q:Most solar panels (the flat ones that go onto roofs of houses) reject electricity produced by the panels if they are too low in voltage. For example, on a cloudy day, although the panels may still get some sunlight to produce some electricity, it is rejected because its too low in voltage. So, does anyone have any ideas?
On a day that's really dark, I don't think there is anything that can reasonably be done. The voltage is low because the power coming out of the panels is low. A circuit could step that voltage up, but could not increase the power. According to our user's manual, it takes 30 to 40 watts to run our inverter. So if the panels are putting out more than that, it's worth running the inverter. If not, then it's better to not even run it, so the inverter cuts out. A charge controller for a battery would have similar behavior if well-designed. Our array is large enough that during even relatively dark days, there is enough power so that the inverter won't cut out.
Q:Okay, so I have a science fair coming up soon and I need help with my project. SO - What should I use to demonstrate with the propeller? A toy boat? Plane? And I only have mini solar panels ; so how do I put the solar panels on the toy boat/plane to make the propeller move off of the sun's energy? Thanks. Steps please!
Solar panels produce electricity. To move the propeller you need mechanical motion. An Electric motor converts from electrical to mechanical power. Most Solar Panels produce DC electricity as do batteries so you need a DC motor that is sized to match the Output of your solar panels. For small temporary projects like this I find that hot melt glue is great to assemble parts. Using a voltage meter you can expose your solar panels to a strong light (or one equal to what you expect during your demonstration) and measure the voltage across the terminals. This may help to size the motor. It depends upon the size of your propeller and how it is made. Your three choices are to use it to power an airplane, to power a boat underwater or to power a boat like an air boat. You might also use the air boat concept to make a car. (air car) The air boat might be the simplest to make but you will need a body of water to demonstrate the concept. The air car doesn't have such a requirement.
Q:I have heard a lot about solar panels and I want to know how these solar panels works and is it really possible to generate electricity using solar panels. And what is the cost of getting a solar panel installed?
solar panels are a waste, I work for the biggest energy producer on the east coast and we are required by some really dumb laws to have many types of energy sources, fo course the only ones we make money on are coal and nuclear, solar panels we lose a ton of money on because they never make up for the cost it takes to buy them, and technology cannot bring them down because their too expensive even with a gov't subsidy bc of the products to make them. Don't waste your time with them, if you want to save money get a wood furnace
Q:
Yes, solar panels can be used to power a university. Solar panels harness the energy from the sun and convert it into electricity, which can then be used to power various facilities and operations within a university campus. By installing a sufficient number of solar panels, universities can significantly reduce their reliance on traditional energy sources, lower their carbon footprint, and potentially save on energy costs in the long run.
Q:
Solar panels can potentially have a positive impact on home insurance rates. While the initial cost of installation may increase the overall value of a home, insurance companies often offer discounts or special policies for homes equipped with solar panels due to their reduced reliance on traditional energy sources and increased energy efficiency. However, it is recommended to consult with insurance providers to determine the specific impact on rates as it may vary depending on the location, type of system, and other factors.
Q:I just moved into somewhere with solar panels but don't really understand them...all I know is that they heat the water.Do I still have to turn the hot water on with the solar panels or do they heat it automatically or do they store the energy until I turn on the hot water?!
Custom solar-heating systems are unique. Does yours have a circulating pump? Does it have a storage tank? Is the fluid that goes to the panels separated from the household water and transfers heat through a heat-exchanger radiator, and the fluid has antifreeze in it? If it does, is the antifreeze of the variety that won't poison your family if there is a leak? Does your system have a thermostat-controlled pump that turns on when the water in the panels are hot? Does it have a limit-thermostat to turn off the pump when water in the storage tank is hot? There are many more variations to operation of solar-heating panels. Find out who designed it or who knows how to operate it and ask them.
Q:How does the snow cover get removed from the panels?
Just okorder /... As an aside the efficiency of the panels will also be maintained if the panels are cleaned of dust and debris. The maintenance of removing snow and dust is one argument for having the panels on a rack on the ground. Solar Thermal panels are intended to capture the sun's heat. Two types that make hot water are flat panels and vacuum tube collectors. The vacuum tube collectors work better in colder and cloudy areas but their efficiency prevents heat loss that might melt snow. Most of a light snow will fall between them but you are back to maintenance with a heavier snow. Flat panels are less efficient and will melt a light snow off of the panels for a heavier snow you will need the roof rake. The last type of solar panel are solar air panels. These are most often mounted on the side of a house rather than the roof as they are intended to provide hot air to the living spaces. They are essentially like little greenhouses. Unless the snow is building up against the side of the house these should be free from a snow problem.
Q:
Yes, solar panels can be installed on a metal roof. In fact, metal roofs are often considered an ideal surface for solar panel installation due to their durability and longevity. The sleek, smooth surface of a metal roof provides an excellent mounting platform for the solar panels, and the panels can be easily attached using specialized mounting brackets designed for metal roofs.
Q:I have the wattage of solar panel but i dont know about the voltage amp; current rating of it. Plz explain me about the voltage rating of solar panel.
A okorder /

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