BULLS POWER Solar cell purchase knowledge

2016/12/16 18:04:53

A solar cell is a device that directly converts light energy into electrical energy through a photoelectric effect or a photochemical effect. Photoelectric effect of the work of thin film solar cells as the mainstream, a lot of people do not know how to buy solar cells 

Classification of solar cells

Currently on the market of solar cells are divided into amorphous silicon and crystalline silicon. Which can be divided into polycrystalline silicon and monocrystalline silicon. From the three photoelectric conversion efficiency is: monocrystalline silicon (up to 17%)> polysilicon (12 ~ 15%)> amorphous silicon (about 5%). However, crystalline silicon (monocrystalline silicon and polysilicon) in the weak light is basically no current generation, amorphous silicon weak light type is good (in low light, the energy is already very small). So the whole point of view, it is appropriate to use monocrystalline silicon or polycrystalline silicon solar cell materials.


Selection Method of Solar Cells

We buy solar cells, the focus of attention is the power rate of work solar cells, in general, the power of solar panels with solar wafers is proportional to the area. The area of the solar cell chip exactly unequal to  the area of the solar encapsulation panel.because some solar panels although large,Single solar wafer permutation gap is very wide,The solar panel power does not necessarily high


In general, the power of the solar panel is the bigger the better, so the current generated in the sun, can quickly be filled with its built-in battery. But in reality, the need for solar panel power and solar charger portability to find a balance. Solar charger is usually considered the minimum power can not be less than 0.75w, the secondary power of the solar panels in the standard light 140mA current generated. In general, the current generated in the sun around 100mA, if the charge current is lower than the sub-power is too small, basically no significant effect.