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Temper Glass Laminated 205W Polycrystalline Solar Panels Anti-aging
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5> 205W Polycrystalline Solar Panel Application
6> About Solar Panels
A solar panel is nothing but a matrix of series solar cells.
Each individual solar cell can generate approximately half a volt of current so if you combined 54 cells you would get around 27volts of current. The panels usually have light aluminum frames to hold the solar cells in place and are covered with a non-reflective glass to protect the cells from weather and damage since silicon cells are very fragile. Solar panels vary in size and in electric output. In general, the more solar cells on each panel the more watts of electricity they can produce.
The output of a solar panel is usually stated in watts. The amount of watts of electricity generated by the panel is determined by multiplying the rated voltage by the rated amperage. The formula for wattage is:
VOLTS x AMPS = WATTS
Let's use as an example a large solar panel measuring about 58.66 inches by 39.33 inches that might be used in a typical home energy system. The solar panel has a rated voltage of 26.70volts and a rated amperage of 7.88 amps. The wattage calculation would look like this:
26.7 volts x 7.88 amps = 210 watts
If a particular location has an average of 6 hours of peak sun per day, then the solar panel in this example can produce an average 1260 watt-hours (6 x 210) of power per day. Most homes use far more than one kilowatt-hour per day. Most use between 10 and 25 kilowatt hours per day. Given this it is going to take a lot more than one solar panel to generate enough electricity to completely power your home. For a homeowner running on 20 kilowatt hours per day it would take approximately 16panels to provide 100% of the electricity they need on a daily basis. That is a lot of solar panels. Many homeowners do not have enough space on their south facing roof for this many panels. Consequently, in most home PV applications where you are connected to the grid you should think of the system as providing part, but not all of your energy. Whenever you receive a bid from a solar contractor they should tell you what percentage of your energy consumption the system is likely to produce.