Solar Power Generation System

- Jun 24, 2019-

The solar power generation system consists of a solar battery pack, a solar controller and a storage battery (group). If the output of the solar power generation system is to be AC 220V or 110V, the inverter needs to be configured.

Relevant composition: 

Solar cell panel classification

Crystal silicon panels: polysilicon solar cells, single silicon solar cells. Amorphous silicon panels: thin film solar cells, organic solar cells. Chemical dye panel: dye sensitized solar cell.

(1) Single-crystal silicon solar cell 

The photoelectric conversion efficiency of the single-crystal silicon solar cell is about 15%, up to 24%, which is the highest photoelectric conversion efficiency in all kinds of solar cells, but the manufacturing cost is large so that it can not be commonly used. Since single crystal silicon is generally encapsulated with tempered glass and water-proof resin, it is durable and has a service life of up to 15 years, up to 25 years.

(2) The fabrication technology of polysilicon solar cells is similar to that of monolitic silicon solar cells, but the photoelectric conversion efficiency of polysilicon solar cells is about 12% (the worldundefineds highest efficiency polysilicon solar cell, which is 14.8% in Sharp, Japan, on July 1, 2004). From the point of view of production cost, it is cheaper than single silicon solar cell, the material manufacture is simple, the power consumption is saved, and the total production cost is low, so it has been developed a lot. In addition, the service life of polysilicon solar cells is shorter than that of single silicon solar cells. In terms of performance-price ratio, single-crystal silicon solar cells are slightly better.

(3) Amorphous silicon solar cell 

The amorphous silicon solar cell is a novel thin-film solar cell in 1976, which is completely different from the manufacturing method of the single-crystal silicon and the polycrystalline silicon solar cell, the process process is greatly simplified, the silicon material consumption is low, the power consumption is lower, Its main advantage is that power can also be generated under weak light conditions. However, the main problem of the amorphous silicon solar cell is that the photoelectric conversion efficiency is low, the international advanced level is about 10%, and is not stable, and the conversion efficiency of the amorphous silicon solar cell is attenuated over time. 

(4) Multi-compound solar cell 

The multi-element solar cell refers to a solar cell made of a single element semiconductor material. There are a wide variety of studies in various countries, most of which have not been industrially produced, mainly including the following: a) a copper sulfide solar cell b) a copper-selenium-based solar cell (c) a copper-selenium-based solar cell (a novel multi-element band-gap gradient Cu (In, Ga) Se2 thin-film solar cell) Cu (In, Ga) Se2 is a kind of semiconductor material with excellent performance of sunlight absorbing material, with gradient energy band gap (energy difference between conduction band and valence band), so that the range of solar absorption spectrum can be expanded, and then the photoelectric conversion efficiency can be improved. And the thin-film solar cell which has higher photoelectric conversion efficiency than that of the silicon thin-film solar cell can be designed on the basis of the solar cell. The photoelectric conversion rate that can be reached is 18%, and so far, such thin-film solar cells have not been found to cause a performance degradation effect (SWE) due to optical radiation, the photoelectric conversion efficiency of which is about 50 to 75% higher than that of a commercial thin-film solar cell panel, The highest level of photoelectric conversion efficiency belonging to the world in thin-film solar cells.

The controller

Solar controller is composed of special processor CPU, electronic components, display, switch power tube and so on.

■ main features:

1, the use of single-chip microcomputer and special software, to achieve intelligent control; 2, the use of battery discharge rate characteristics of accurate discharge control. Discharge termination voltage is a control point modified by discharge rate curve, which eliminates the inaccuracy of simple voltage control overdischarge, and conforms to the inherent characteristics of battery, that is, different discharge rates have different termination voltage. 3, with overcharge, overdischarge, electronic short circuit, overload protection, unique anti-reverse connection protection and other automatic control; The above protection does not damage any parts, does not burn insurance; 4, the use of a series of PWM charging main circuit, the voltage loss of the charging circuit is reduced by nearly half than the use of diode charging circuit, charging efficiency is higher than non-pwm 3% to 6%, increased the time of electricity consumption; Overdischarge recovery of the lifting charge, normal direct charge, floating charge automatic control mode to make the system from a longer service life; At the same time, it has high precision temperature compensation. 5, intuitive LED LED indicator current battery state, so that users understand the use of the situation; 6. All controls are industrial grade chip (only industrial grade controller with I), which can operate freely in cold, high temperature and humid environment. At the same time, crystal oscillator timing control is used. 7. The set point of potentiometer adjustment and control is cancelled, and e-square memory is used to record all working control points, so that the setting is digitized, eliminating the factors that may cause errors of control points to reduce accuracy and reliability due to potentiometer vibration deviation and temperature drift, etc.; 8, the use of digital LED display and Settings, one-click operation can complete all the Settings, the use of extremely convenient and intuitive function is to control the working state of the whole system, and the battery has played a charge protection, over discharge protection. Where the temperature difference is large, the qualified controller should also have the function of temperature compensation. Other additional functions such as light-controlled switch and time-controlled switch should be optional for the controller.