Solar Panel

Photovoltaic cells, by their very nature, convert radiation to electricity. This phenomenon has been known for well over half a century, but until recently the amounts of electricity generated were good for little more than measuring radiation intensity. Most of the photovoltaic cells on the market today operate at an efficiency of less than 15%2; that is, of all the radiation that falls upon them, less than 15% of it is converted to electricity. The maximum theoretical efficiency for a photovoltaic cell is only 32.3%3, but at this efficiency, solar electricity is very economical. Most of our other forms of electricity generation are at a lower efficiency than this. Unfortunately, reality still lags behind theory and a 15% efficiency is not usually considered economical by most power companies, even if it is fine for toys and pocket calculators. Hope for bulk solar electricity should not be abandoned, however, for recent scientific advances have created a solar cell with an efficiency of 28.2%4 efficiency in the laboratory. This type of cell has yet to be field tested. If it maintains its efficiency in the uncontrolled environment of the outside world, and if it does not have a tendency to break down, it will be economical for power companies to build solar power facilities after all.

The advantages of the solar panel:
1.Solar energy is free although there is a cost in the building of ‘collectors’ and other equipment required to convert solar energy into electricity or hot water.
2. Solar energy does not cause pollution. However, solar collectors and other associated equipment / machines are manufactured in factories that in turn cause some pollution.
3. Solar energy can be used in remote areas where it is too expensive to extend the electricity power grid.
4. Many everyday items such as calculators and other low power consuming devices can be powered by solar energy effectively.
5. It is estimated that the worlds oil reserves will last for 30 to 40 years. On the other hand, solar energy is infinite (forever).

The disadvantages of the solar panel:
1.Solar energy can only be harnessed when it is daytime and sunny.
2. Solar collectors, panels and cells are relatively expensive to manufacture although prices are falling rapidly.
3. Solar power stations can be built but they do not match the power output of similar sized conventional power stations. They are also very expensive.
4. In countries such as the UK, the unreliable climate means that solar energy is also unreliable as a source of energy. Cloudy skies reduce its effectiveness.
5. Large areas of land are required to capture the suns energy. Collectors are usually arranged together especially when electricity is to be produced and used in the same location.
6. Solar power is used to charge batteries so that solar powered devices can be used at night. However, the batteries are large and heavy and need storage space. They also need replacing from time to time.

Solar panels
Solar panels
Solar panels
Solar panels
SN-S120W Solar Pannel
SN-S150W Solar Pannel
Maximum Power
Production Tolerance
Maximum Power voltage
Maximum Power current
Open circuit voltage
Short circuit current
Cell efficiency
Module efficiency
size of modul
Frame Material
Alloy frame,46mm thiness
number of cells
size of cells
Weight per piece Kg
type of junction box
cable type and length
connector typ
PV cable, 0.9m, Plug and socket
maximum system voltage
Temperature coefficient of Isc
Temperature coefficient of Voc
Temperature coefficient of power
Temperature coefficient of Im
Temperature coefficient of Vm
Nominaloperating cell temperature
Wind Bearing
Impact Resistance Hail Impact Test
227g steel ball fall down from 1m height
Quality guarantee
CE、TUV,3 years products warranty and 25 years 80%of power
Tolerance Wattage(e.g.+/-3%)
Surface maximum load capacity
Output tolerance
Standard test conditions
AM1.5 100mw/cm2
Front view (click to enlarge)
120W solar panel front
150W solar panel front
Back of the map (click to enlarge)
120W solar panel on the back of
150W solar panel on the back of