DC solar power system System composition
Power generation principle
Crystalline silicon n / p-type solar cell works: When the p-type semiconductor and n-type semiconductor closely integrated into a piece, at the interface between the two to form p-n junction. When the photovoltaic cells are exposed to sunlight, the p-n junction on both sides of the formation of positive and negative charge accumulation, resulting in a photoelectric voltage, forming a built-in electric field, which is the "photovoltaic effect." PV square in the case of light will be converted into electrical energy, through the solar charge and discharge controller to the load power supply, while charging the battery pack; in the absence of light, through the solar charge and discharge controller from the battery to the DC load power supply, At the same time the battery also directly to the independent inverter power supply, through an independent inverter inverter into alternating current, to the AC load power supply.
Set the principle
solar power generation system design needs to consider the factors:
1, where is solar power used? What is the solar radiation situation?
2, the system's load power?
3, the system's output voltage is the number of DC or AC?
4, the system need to work every day how many hours?
5, if encountered no sunshine rainy weather, the system needs to supply power for several days?
6, the load situation, pure resistance, capacitive or inductive, start the current how much?
7, the number of system requirements.
The system consists of solar panels
Solar panels are the core of the solar power system, the role of solar panels is the sun's light energy into electricity, the output DC into the battery. Solar panels are one of the most important components of household solar power systems, and their conversion rates and service life are important factors in determining whether solar cells are of value.
Raw material characteristics:
Battery: the use of high efficiency (16.5%) monocrystalline silicon solar chip package to ensure that solar panels generate sufficient power.
Glass: the use of low-iron steel fused glass (also known as white glass), the thickness of 3.2mm, in the solar cell spectral response wavelength range (320-1100nm) light transmission rate of 91% or more, for more than 1200 nm infrared light Have a higher reflectivity. This glass can also control the sun's ultraviolet radiation, light transmission rate does not decline.