How to choose a solar panel or module.
If You decide to buy cheap Chinese solar panels be prepared that photoelectric elements of the modules are made of amorphous or polycrystalline silicon.
As starting material for the production of monocrystalline silicon using polycrystalline.
This explained the difference in price, efficiency and lifetime of solar panels.
The lifespan of monocrystalline solar panels is due only to the sealing materials.
The homogeneity of the electrical properties allows to increase the efficiency monogrammatic solar panels up to 18 - 20%.
Monocrystalline silicon is resistant to chemical and aggressive atmospheric and climatic influences. The air is covered by a protective oxide film transparent to infrared and visible spectrum of solar radiation.
In recent time there appeared the so-called multicrystalline silicon solar battery. Not to be confused with the single crystal.
In fact it is polycrystalline or amorphous solar panels but with the aim of substitution of concepts and a greater phonetic similarity to monocrystalline solar panels the name changed.
After several years of operation to sell the more amorphous polycrystalline solar panels will be difficult for the reasons stated on the Recommendations page.
A good example of polycrystalline solar cells - led garden lanterns. On the second season of operation it already runs significantly shorter period of 4 to 5 hours maximum.
And it makes no sense to change the battery it still will not be fully charged due to the decline in the efficiency of the solar battery which leads to chronic not recharging and premature battery into retirement.
And that's not all.
Types of solar batteries it is possible to separate the two conventional categories
The first to work. The thickness of the photovoltaic cells provides an in-depth study of photon and electron emission for life.
The second for sale. Solar cells which are committed to the thickness of the foil. With all the consequences.
This is what inclined cheap Chinese photovoltaic panels.
In Russian speaking- If the price is ridiculous so the quality is hilarious.
With a significant wind loads and insufficient thickness of the carrier glass with the fragility of silicon wafers, the consequences are easily predictable.
Maintainability is zero.
Chinese solar panels are very sensitive to low temperatures due to the use of cheap laminating film.
At negative temperature EVA film shrinks, resulting in depressurization of the ingress of air between the solar cell and the glass. The air gap reduces the efficiency of the total current of the solar battery