Pure Solar Panels - Poly Solar Panel 290W B Grade with Cheapest Price
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 watt
- Supply Capability:
- 10000 watt/month
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Specification
Material:
Polycrystalline Silicon
Max. Power(W):
290
Number of Cells(pieces):
60
Poly Solar Panel 290W B Grade with Cheapest Price
Product description
he photovoltaic effect was experimentally demonstrated first by French physicist Edmond Becquerel. In 1839, at age 19, he built the world's first photovoltaic cell in his father's laboratory. Willoughby Smith first described the "Effect of Light on Selenium during the passage of an Electric Current" in a 20 February 1873 issue of Nature. In 1883 Charles Fritts built the first solid state photovoltaic cell by coating the semiconductor selenium with a thin layer of gold to form the junctions; the device was only around 1% efficient.Solar cells are described as being photovoltaic irrespective of whether the source is sunlight or an artificial light. They are used as a photodetector (for example infrared detectors), detecting light or other electromagnetic radiation near the visible range, or measuring light intensity.
loss and possible damage because of the reverse bias applied to the shadowed cells by their illuminated partners. using independent MPPTs (maximum power point trackers) is preferable. Otherwise, shunt diodes can reduce shadowing power loss in arrays with series/parallel connected cells.[citation needed]
Application
Business
Home
Industry
Large project
Feature
1. A grade high efficiency solar cells.
2.TUV/UL/CE/CEC etc
3.Fast shippment
4.25 years warranty
5.OEM/ODM
Packaging
28pcs into one carton
Shipping
Material in stock can be produced (procedure 5-20days) right away after pre-payment confirmation. COSCO Mearsk MSCship to worldwide for safe shipping, don't worry about package damage or loss. It takes about 15-40 days to worldwide, Please note us your contact details include your phone number for easy contacting from shipping company officer.
- Q: I am doing a report about solar power and I need to know what determines the amount of electricity produced?example: exposure to sun, angle of panel, qualityplease tell me as much as you canmuch appreciated
- It depends on what you mean by amount of electricity. Normally that would mean the total energy produced over a given period. In that case, the main factors are ) Efficiency of the solar cells 2) Total irradiation received: incident radiation density times the solar panel area, and the angle of the incident radiation. Item ) is determined by the materials and method of construction of the solar cells Item 2) depends on the location of the panel, both on earth's surface (latitude), time of year, and how the panel is oriented with respect to the horizontal. Altitude of the location can also be a factor. Prevailing weather conditions, number of cloudy days, etc. are important. Independent of these parameters, larger area means more electricity.
- Q: I'm doing a project for school and I'm a little confused about energy and solar panels. I'm looking to propose installation of solar panels to power the computer lab at my school. From what I've read a computer and monitor use roughly 350 watts per hour. I was looking at solar panels and it says they produce various wattage. For example, I was looking at one rated at 200 watts. Does that mean 200 watts in a day? Or per hour? Please help.
- The rating of a solar panel is a maximum continuous rating. A 200 Watt panel will give a maximum of 200 watts under ideal conditions. A computer and monitor use about 400 Watts. not per hour - watts is Volts * Amps and a measure of Power. In hour a computer and monitor uses 400 Watt hours (Wh). Wh is a measure of Energy. To power a lab of 0 computers you will need 0* 400 = 4000 Watts. To run this from solar panels through the day only you would need a 4000 Watt panel. Except - its cloudy, the sun is in the wrong place - many factors reduce the output. To be reasonably safe you would need about a 2000 Watt panel. Then you would need batteries to store power through dull periods AND a voltage converter to change from low voltage DC from the solar panels to the mains voltage for your computers.
- Q: my solar panel is 5v 50 mA, and im making iphone USB charger so i need to connect + with 00 ohm resister and to data - and + so what resister will be okay..?
- Just connect the 5 volts out of the panel directly to the iphone via an USB connector. BUT, is the panel output always 5 volts, ±0.25 volts? Because that is the USB specification, and anything outside of those values could damage your iphone. And solar panels are known for their wide swings in voltage. Bottom line, resistor not needed, and you need to be positive you supply the correct voltage to the iphone. Best way to do that is to start with a solar panel that puts out at least 7 volts and use a LM7805 regulator. The only resistors needed are those to tie the data lines into a certain combination of resistance and voltage so that the iphone is fooled into thinking that a proper USB is connected. That would NOT involve a 00 ohm resistor. Search online for the proper values and connections. edit: are you repeating your same inane question with a different account? That is totally against the rules and could get you suspended.
- Q: What is the impact of tree shading on solar panels' efficiency?
- The impact of tree shading on solar panels' efficiency is negative as it reduces the amount of sunlight reaching the panels and therefore decreases their energy production.
- Q: Photo-Voltaic solar panels are very expensive. Most of a home's energy needs are for heating water, heating and air-conditioning. All of these can be met with thermal solar collectors which are much less expensive. The thermal solar panels would heat water stored in a hot water tank which then can be used as hot water, to heat the home, or as the heat source to a Lithium Bromide Absorption chiller to air-condition a home. With the base line needs met without expensive panels and without inefficient energy conversions, only a small Photo-Voltaic array would be needed for the remaining power needs and since those needs are variable, there would still be power to sell to the grid.
- Just read some of the other posts and I am surprised at the answers. Solar thermal systems typically have a payback of less than seven years on residential system without the tax break. A complete system can be installed for about 5k or less. Compare that to 20k or more for PV with a fifteen to twenty year pay off. Each home and area is different so a site evaluation must be done for exact figures and pay offs. I am going off my own experience in my above statements Flat panel collectors work well in most areas for DHW. Evacuated tubes often run too hot which works well for some applications or high usage. Heating water is the single greatest energy usage other than space heating and cooling. It often surpasses the two above systems based on its widespread usage(every houshold in USA has one) and its the amount it is used(24/7@365) The amount of energy spent to heat water is by order of magnitude the greatest number out there. Having a solar thermal system providing hot water for a average American household is equivalent to taking 40,000 miles off the freeway in a car every year. The BTU's required to heat the water is huge. So why is this more developed cheaper and more efficient technology behind PV in awareness? Natural Gas the number one choice for heating water is cheap. It's by product is invisible and misunderstood. What I find fascinating is if you look at the increase in Natural Gas vs Electricity you will be surprised by how much it has jumped in the last seven years. It is not talked about nearly as much as electricity It does not get the same level of press that PV does. So in short the answer is cheap Natural Gas prices and public perception of this product have kept it off the list of many that are turning toward the green trend. It is less sexy than watching your meter spin backwards. It is the best improvement at the best cost except for conservation which is and was the most cost effective energy saving that can be employed
- Q: All I want to power is a small ice-maker (250 watts) for 25 minutes per day. That's all!!!Can I do that by using a 00 watt panel with 2-3 deep cycle batteries and getting 0 hours of quality light per day.(BTW) what size converter would you recommend? I want more than I need to grow the system
- If okorder and they ship across the US and Canada.
- Q: What do these mean? I'm interested in doing a solar panel project. The problem is I know nothing about electricity, wiring, or panels so I've bought a small panel to experiment with first.I don't know what amps, watts, or volts are; what I should be reading on the batteries I will be charging? Or on the small appliances I will be running?The panel I bought has four settings:. 3V ---- 200mA2. 6V ---- 00 mA3. 9V ---- 50mA4. 2V ---- 50 mA(What is mA?)Also, will you give examples of what I can run with this? Make up any scenarios with whatever amps/volts/watts.
- . 3V 200mA. mA (milliAmp) = 0.00A; Power = 3V x 0.2A = 0.6 Watts. 2. 6V 00mA is 6 x 0. = 0.6 Watts. 3. 9V 50mA is 9 x 0.05 = 0.45 Watts. 4. 2V 50mA is 2 x 0.05 = 0.6 Watts. With the 3 Volts one you could connect it to a flashlight light bulb, that's is about the max you can get out of it. With the light bulb, polarity doesn't matter, but if you power a small transistor radio with it, then make sure the + goes to the + and the - to the -. Reversing it wouldn't work and in some cases you could damage equipment.
- Q: Can solar panels be installed in urban areas?
- Yes, solar panels can be installed in urban areas. In fact, urban areas provide great opportunities for solar panel installations due to the abundance of rooftop space and potential to generate clean energy in densely populated areas.
- Q: Can solar panels be installed on a deck or patio?
- Yes, solar panels can be installed on a deck or patio. In fact, many homeowners choose to install solar panels on their outdoor spaces to maximize sunlight exposure and take advantage of the available space. However, it is important to consider the structural integrity of the deck or patio and ensure that it can support the weight of the solar panels. Additionally, local regulations and permits may be required before installation.
- Q: Basically I need a custom solar panel created. I won't go into detail but the dimensions need to be around 4''x2.5'' and be as thin as possible.
- There's no way that home built system that will generate enough power to run your home off the grid. That's all hogwash! No wind = no electricity generated. No sun = no electricity generated. I'm looking into a grid tie solar system. I'm still working out the math for my home. They are expensive ($20k - $50k) before tax credits, but they have been designed by engineers, not back yard, shade tree wanna-be engineers. They will put power into the grid during the day (making your meter run backwards) and you'll draw the power back at night (when there's no sun). This is perfectly legal. It must be installed by power company approved techs. That's how power companies are going to meet their green energy mandates for the future. You'll generate power for the power company and get paid wholesale prices for it (during the day). But you'll buy it back at retail (at night)
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Pure Solar Panels - Poly Solar Panel 290W B Grade with Cheapest Price
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 watt
- Supply Capability:
- 10000 watt/month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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