The principle of solar photovoltaic solar power generation is introduced

( A) Crystalline silicon solar cell works n/p type of solar cell works: when a p-type and n-type semiconductor semiconductor closely together as a block, formed in the interface of the p - N junction. When the cell is the sun, in the p - N junction on both sides of the

crystalline silicon solar cell works n/p type solar cell working principle is: when the p-type and n-type semiconductor semiconductor closely together, formed in the interface of the two p - N junction. When there is the sun of photovoltaic cells, the positive and negative charges in the pn junction on both sides of the gathered themselves together, and produce pv voltage, forming the built-in electric field, which is 'photovoltaic effect'. In theory, at this point, if the electrode from the both sides of the built-in electric field, and connect the appropriate load, will form the current, and to gain power in the load. Solar energy battery components are using electronic properties of semiconductor materials for photoelectric conversion of solid components. ( 2) The basic component of the solar system and solar power generation system consists of solar modules, solar controller and the battery ( Group) Composition. If the output power to 220 v or 110 v ac, also need a inverter. ( 3) Each part of the role of solar panel: solar panel is the core part of solar power generation system, also is the most valuable part of the solar system. Its function is to convert the sun's radiation ability into electrical energy, or store it into the battery, or promote work load. Solar controller: solar controller's function is to control the working state of the whole system, prevent the battery overcharge and over discharge. In difference in temperature big place, qualified controller should also has temperature compensation function. Other additional features, such as light control and time control switch should be the optional features of the controller. Battery: normally lead-acid battery, nickel metal hydride batteries, nickel-cadmium batteries or lithium batteries can also be used for small and micro system. Its function is when there is light store electric energy from solar panels, and released when needed. Direct output of inverter, solar energy is usually 12 VDC and 24 VDC and 48 VDC. To 220 volts ac power supply, need to convert solar power generation system to produce direct current (DC) to alternating current (ac), so you need to use DC ac inverter. Efficiency is to choose one of the important standards of inverter. The higher efficiency, the photovoltaic module will produce direct current into alternating current in the process of producing the less power loss. It can be said that the inverter quality determines the efficiency of power generation systems, and power generation system is the core of the solar system. ( 4) Main factors to consider in the design of solar power generation system of solar power generation system used in where? How is the area of solar radiation? How much is the load power system? How much is the output voltage and frequency of the system, DC or ac? The system need to work how many hours a day? In the rainy days without sunshine, the system need how many days of continuous power supply? How much is load starting current, resistance, capacitance or inductance?