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What is the difference between off-grid PV power generation and on-grid PV power? PV off-grid is a power generation system that does not rely on the power grid but operates independently, and is suitable for areas without power grids. On-grid PV must be connected to the grid, and the excess electricity can be transmitted to the public grid to earn revenue.
PV power generation has entered thousands of households. Many people do not know the difference between off-grid PV power generation and on-grid power generation. When purchasing supporting products for PV power generation systems, they do not understand how to choose between off-grid inverters and on-grid. Now follow Aerospace Baykee to understand the advantages and disadvantages of both.
1-1 Introduction of photovoltaic off-grid
Photovoltaic off-grid is a power generation system that does not rely on the grid and operates independently. It is mainly composed of solar panels, charge and discharge controllers, energy storage batteries, inverters and other components. The battery panel converts solar energy into electric energy when there is light, and the solar control inverter integrated machine supplies power to the load and at the same time charges the battery pack; when there is no light, the battery powers the AC load through the inverter, which is a repeat the cycle of charging and discharging process.
1-2 System advantages of PV off-grid
PV off-grid power generation system is not restricted by regions and power grids and is widely used. It can be easily installed and used as long as there is sunlight. It is very suitable for remote areas without power grids or underdeveloped power grids, isolated islands, fishing boats, outdoor breeding bases, etc. It can also be used as emergency power generation equipment in areas with frequent power outages. Aerospace Baykee photovoltaic off-grid systems are divided into micro-home systems and large-scale industrial use systems. They have been exported to Africa, the Middle East, Southeast Asia, the United States and other places for many times, and are well received by local users.
1-3 Application analysis of PV off-grid
The PV off-grid power generation system must be equipped with batteries, and the service life of the batteries is generally 3-5 years, and they must be replaced later, which undoubtedly increases the cost of use. From an economic point of view, it is difficult to get a large-scale promotion and use, and it is not suitable for use in places where electricity is convenient.
2-1 Introduction of PV on-grid system
PV on-grid system must be connected to the public power grid, that is, solar power generation, home power grid, and public power grid are connected together. It is mainly composed of solar panels, on-grid inverters and on-grid cabinets. The solar panels generate AC power that is directly converted by the inverter into the AC power required by the user and supply power to the household appliances. When the power generated by the solar energy exceeds the power used by the household appliances at that time, the surplus electricity is delivered to the public grid; and when the solar power generation capacity cannot meet the use of household appliances, it is automatically replenished from the grid. And this whole process is intelligently controlled and does not require manual operation.
2-2 System advantages of PV on-grid system
The PV on-grid power generation system does not need to use batteries, which greatly saves operating costs. From a long-term perspective of investment, based on the 25-year service life of a household photovoltaic power station, the cost can be recovered in about 6-10 years, and the remaining ten years will be earned. Therefore, if you want to save electricity bills and provide convenient power supply, you can choose an on-grid solar power system, which is also the current mainstream method.
2-3 Application analysis of PV on-grid system
The power generation system must rely on the existing power grid to operate, and PV power generation cannot operate when the public power grid is out of power. If the on-grid inverter is replaced with a smart micro-grid inverter (a hybrid inverter for on-grid and off-grid), the power station can operate normally. The TYN-M series PV on and off-grid hybrid energy storage inverter newly developed by Aerospace Baykee is applied to PV energy storage systems. The system uses PV energy first. When PV energy is insufficient, it will be supplemented by mains or batteries. The storage battery or the internet can realize the maximum utilization of photovoltaic power generation, so as to achieve the purpose of self-generation and self-use, and the purpose of surplus electricity to be connected to the Internet. In addition, the peak-valley time period can be set according to the needs of different customers to achieve peak-shaving and valley-filling, reduce the pressure on the power grid, and earn the maximum benefit. The system is compatible with lead-acid batteries and lithium batteries. When the grid fails, solar energy can continue to generate electricity and switch to off-grid mode to continue supplying power to the load.
Aerospace Baykee is a leading power supply manufacturer. To learn more, please contact us immediately.