The Advantage And Differences Of PV Off-Grid Systems And On-Grid Systems

The off-grid photovoltaic power generation system consists of photovoltaic modules, batteries, inverters, photovoltaic controllers, and brackets. The off-grid power generation system does not depend on the grid and operates independently. When there is light, the solar energy is converted into electric energy, and solar energy is used to control the inverter to supply power to the load and to charge the battery at the same time. When there is no light, the battery supplies power to the AC load through the inverter, which belongs to the mode of self-generation and self-use.

Scope of application: rural and remote power shortage areas, frequent power outage areas

Advantages: It is not limited by regions, does not depend on the power grid, and is widely used. As long as there is sunlight, the off-grid solar power generation system can be installed and used.

The grid-connected photovoltaic power generation system consists of photovoltaic module modules, inverters, brackets, combiner boxes/grid boxes. The electricity generated by the photovoltaic modules is given priority to the load. When the load cannot be used up, the excess electricity is sent to the grid. When the power supply to the load is not enough, the grid and the photovoltaic system can supply power to the load at the same time, which belongs to the mode of "self-generated and self-use, surplus power grid".

Scope of application: Those who want to meet their daily needs from grid-connected photovoltaic power generation systems and profit from the excess electricity generated.

Advantages: From the perspective of configuration, there is no need to use batteries, which saves costs; from the perspective of investment, excess electricity can be sold to power companies to gain profits.