20W Solar Photovoltaic Panel CE TUV UL CERTIFICATE

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Tianjin
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1000 watt
Supply Capability:
50000 watt/month

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Product Description:

Introduction

 

20W Solar Photovoltaic Panel CE TUV UL CERTIFICATE,this is a small kit for home or block. this product is a higer output version with stable power and we gurantee you for 25 years.            

 

suggestion

 

home lighting business lighting,

Garden lighting, pavement lighting    

Farmer household lighting

Decorative water pump

Traffic signal lighting

 

Product features

 

20W~25W output under standard conditions

Output Voltage 18V, suitable for 12V power system

Can fully charge up a 12V 7.2AH battery within 4~6 hours

Poly-crystallize Solar Cells from Taiwan or Germany

Product life over 25 years

Resistance to fluctuations of temperature, humidity and strong wind

Manufactured under IEC61215 Solar Photovoltaic Panel requirements

 

packing

 

Individual carton box for solar panel

2 solar modules in a carton

A carton board separates two solar panel

For LCL goods, we use bulk carton box or wooden boxes

 

Parameters

 

 

20W Solar Photovoltaic Panel CE TUV UL CERTIFICATE

20W Solar Photovoltaic Panel CE TUV UL CERTIFICATE

 

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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:are solar panels worth buying?
There are different kinds of solar panels. The biggest division is between photovoltaic panels that produce electricity and thermal solar panels that produce heat for hot water and space heating. Commercial photovoltaic panels are from 8 to 24% efficient while solar thermal panels are from 60 to 80% efficient. Solar thermal panels especially for hot water have a much higher ROI (return on investment) than photovoltaic panels. A solar hot water system may have a payback period (when savings equal the investment) as short as 3 to 5 years while photovoltaic panels will typically have a payback period between 7 and 5 years. Solar panels especially in times of low interest rates may be a very worthwhile investment with a better return than you can find almost anywhere else. But they are also highly dependent upon your situation. Owning a home with a good southern exposure is a prerequisite.
Q:if you put solar panels on cars, you'll be able to drive without gas in the summer and part of winter?
There okorder.com Part of the problem of putting solar panels on a vehicle is that at almost no time is the orientation for the panels correct. You would not consider putting solar panels on the shady side of your house, or not tilted and aimed properly. This is because solar panels are expensive and you would like to make sure that they are as efficient as possible. A better plan may be to put solar panels on your house and buy an electric car. Have the panels feed power into the grid during the day where you can be paid at the higher daytime rates and then charge your vehicle at the lower night time rates from the grid.
Q:Help with solar panels?
Unless you're very rich, you won't be able to afford solar panels that can meet the average demand of a home. In the US, the average demand for a home is 920 kwh per month, which amounts to 3,833 Watt panels if you assume 8 hours of usable sunshine and don't take into account your location. At current installation rates that's easily a $9,65 project. If you assume a 25 year useful life, it amounts to a return of 3.3% per annum at 0 cents a kwh not counting the costs of repair, insurance, the inverter, any fees to the utility for net metering if any etc. You would be better off putting $9,65 into a mutual fund until better technology or government incentives came along, in some areas, the government subsidies can make it worth your while. Also, keep in mind that in many areas, the net metering arrangements only deducts the power you've generated from your bill so you would want to size the array to meet your base usage in order to get the most from your investments. So meeting your actual needs would result in a loss on the return as there will be months where your usage is less than your average. In theory, if you put $7,208.69 into a mutual fund expected to return 4.4% per annum then you could withdraw enough to pay each month's power bill for 25 years at $0.0 a kwh and therefore be self sufficient through financial means. You would get more mileage focusing on heating and hot water as heating and hot water is 75% of a home's energy use and can be addressed with lower cost technologies like passive solar and solar thermal panels. You have to put it into perspective, it's an investment and you want a return that's competitive with your investment opportunities.
Q:How many LED's can I hook up to my mini-solar panel?
You need to answer that by designing circuits to provide each LED with its specific voltage and current requirements, and then see how many you can supply.
Q:Can solar panels work in the shade?
They will work somewhat in the shade but they really work best in direct sunlight. I have solar panels on my home and just a cloud passing over will cause the output to drop quite a bit.
Q:What happens if I put a 00v, .5A solar panel on a 2V, 450cca Gel deep cycle battery?
The solar panel is capable of /2 Amp output. If you hook it to a 2V battery directly and the battery is discharged it will want more than /2 Amp and pull the voltage down until the battery is charged to a certain level. Eventually the battery will try to charge up to 00V which will definitely damage the battery. If you use a regulator circuit running off the solar panel that outputs 2V then you will have a constant voltage circuit which will still be limited to /2A or whatever the regulator is capable of outputting. Of course you can't just go out and connect 00V to any voltage regulator it has to be capable of running from 00V and dropping the voltage to 2V like the original charger that comes with the battery. The same explanation applies to a 72V battery. You have to limit the output voltage to 72V or risk overcharging the battery.
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.
Q:How Solar Panel Works ?
photons excite electrons in the silicon to a higher energy level
Q:how long does it take for a solar panel to make one watt?
Well, a 5 Watt solar panel running for an average of 2 hours per day, (there will be clouds), will put 5 * 2 = 80 Watt-hours into the battery. Assuming your inverter, (to convert 2 Volts D.C. to 20 Volts A.C.) runs at 00% efficiency, that will only supply power to run the grill for about 22 minutes a day. In the real world, neither the battery nor the inverter will work at 00%, to your actual heating time will be significantly less. If you get about 0 more of those 5 Watt solar panels, that would give you about 50 Watts * 2 hours or about 800 Watt-hours which would more than cover what you want to do. The next problem is getting an inverter which will handle a 700 Watt load. They can be found at auto supply houses and the larger truck stops. (They are popular with semi-drivers.) Note however, that a standard car battery will have to supply about 55 Amps, which means you will have to use some really heavy wire, like # 4 or # 6 welding cables to connect the inverter to the battery to minimize losses. P = 700 Watts E = 3 Volts I = 53.84 Amps R =

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