光伏发电作为绿色新能源的一种，以其投资小、安装工程小、后期维护简单、投资效益明显等优点，正是因为光伏发电既绿色环保，又有经济效益，得到越来越多人的认可，下面来讲讲
免费安装光伏发电的原理和注意事项。
As a kind of green new energy, photovoltaic power generation has been recognized by more and more people because of its small investment, small installation project, simple maintenance in the later period, and obvious investment benefits. Now let's talk about the principle and precautions of free installation of photovoltaic power generation.
免费安装光伏发电基本原理就是“光伏效应”。光子照射到金属上时，它的能量可以被金属中某个电子全部吸收，电子吸收的能量足够大，能克服金属内部引力做功，离开金属表面逃逸出来，成为光电子。
The basic principle of free installation of photovoltaic power generation is "photovoltaic effect". When a photon shines on a metal, its energy can be fully absorbed by an electron in the metal. The energy absorbed by the electron is large enough to overcome the internal gravity of the metal to do work, escape from the metal surface and become a photoelectron.
“光生伏特效应”，简称“光伏效应”。是指光照使不均匀半导体或半导体与金属结合的不同部位之间产生电位差的现象。它是由光子（光波）转化为电子、光能量转化为电能量的过程；其次，是形成电压过程。有了电压，就像筑高了大坝，如果两者之间连通，就会形成电流的回路。
"Photovoltaic effect", referred to as "photovoltaic effect". It refers to the phenomenon of potential difference between heterogeneous semiconductors or different parts of semiconductors and metals combined by light. First of all, it is a process of converting photons (light waves) into electrons and light energy into electrical energy; Secondly, it is the process of voltage formation. With voltage, it is like building a dam. If the two are connected, a current loop will be formed.
太阳能电池，通常称为光伏电池。目前的主要的太阳能电池是硅太阳能电池。用的硅是“提纯硅”，其纯度为“11个9”，比半导体或者说芯片硅片“至少两个9”；又因为提纯硅结晶后里头的成分不同，分为多晶硅和单晶硅；目前，单晶硅太阳能电池的光电转换率为15％左右，高达到了24％。
Solar cells are commonly referred to as photovoltaic cells. At present, the main solar cell is silicon solar cell. The silicon used is "purified silicon" with a purity of "11 nines", which is "at least two nines" higher than that of semiconductor or chip silicon chip; Because the components of purified silicon are different after crystallization, it can be divided into polycrystalline silicon and monocrystalline silicon; At present, the photoelectric conversion rate of monocrystalline silicon solar cells is about 15%, up to 24%.
光伏发电注意事项：
Precautions for photovoltaic power generation:
不要在不利的环境下安装或操作分布式光伏发电系统，例如强风和阵风天气、潮湿结霜的屋面表面等。
Do not install or operate the distributed photovoltaic power generation system in adverse environment, such as strong wind and gusty weather, wet and frosty roof surface, etc.
不要在没有安全防护措施的情况下在屋顶上安装光伏组件，其中防护措施包括跌落防护、梯子和楼梯及个人防护装备等。
Do not install PV modules on the roof without safety protection measures, including fall protection, ladders and stairs and personal protective equipment.
在有光照的情况下光伏发电系统会产生直流电，电流随着光线的增强而增强，如果触碰组件电子线路会有遭到电击或者烧伤风险。
When there is light, the photovoltaic power generation system will generate direct current, and the current will increase with the increase of light. If the electronic circuit of the module is touched, there will be a risk of electric shock or burns.
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