Solar energy as the world's most clean energy, it is current wide range of applications, solar photovoltaic surge protection becomes more and more important nowadays, in order to facilitate users know more about it, we will introduce Photovoltais PV systems technology basic information.
Solar photovoltaic system is the use of solar photovoltaic effect of semiconductor materials, the solar radiation directly into new electricity generating system, a stand-alone and grid operation in two ways. Stand-alone photovoltaic power generation system needs to have the battery as the energy storage device, mainly for non-grid areas in remote areas and scattered population, the entire system cost is very high; in the areas of public power grid, grid-connected photovoltaic power generation system and network Operation, eliminating the need for batteries, not only can greatly reduce the cost, but also has higher power generation efficiency and better environmental performance.
Elements
A basic solar power system is composed of solar panels, charge controllers, inverters and batteries composed of various parts of the following features to make a brief introduction:
Solar panels
The role of solar panels solar radiation is converted directly into direct current for the load on the battery during use or storage use. Generally it is based on user needs, according to a certain number of solar panels connected to form a solar cell matrix, matched with the appropriate support and connection box.
Charge Controller
In different types of photovoltaic power generation systems, charge controllers vary the number and complexity of their functions vary widely, this requires the system requirements and to determine the degree of importance. Electronic components mainly comprised by the charge controllers, meters, relays, switches and other components. In the solar power generation system, the charge controller's basic role is to provide the best battery charging current and voltage, fast, stable and efficient for battery charging, and reduce losses in the charging process, try to extend battery life; the same time Protect the battery, avoid charging and over-discharge phenomenon. If you use DC load, the load through the charge controller can provide a stable direct current (due to weather, solar square issued by the DC voltage and current is not very stable).
Inverter
The role of the inverter is to provide solar cell matrix and low-voltage DC reverse battery into 220 volts AC, supply AC load.
Batteries
Square solar battery is stored up for the issue of direct current load. In the photovoltaic system is floating battery discharge state. Large amount of summer sunshine, in addition to the load supply of electricity, but also charge the battery. There are less sunshine in the winter, stored energy will be gradual released. During the day to the battery charging solar cell matrix, while matrix but also to the load of electricity. Thus requiring smaller batteries self-discharge, and higher charge efficiency, but also to consider whether the use of price and convenience factors. Commonly used batteries are lead-acid batteries and gel batteries, require a higher price of the occasion are also more expensive nickel-cadmium batteries.
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