Photovoltaic power generation is a green and low-carbon lifestyle. In recent years, global photovoltaic power generation system installations have shown a trend of increasing year by year, with a global photovoltaic installed capacity of 300GW in 2016. The total installed capacity of China is 77.42GW, followed by Japan, the United States, and Germany. By 2050, photovoltaic power generation will account for 50% of global electricity generation. The number of newly built global solar power plants has significantly increased.

Usually, solar panels are connected in series to generate the required voltage and form a "photovoltaic module" of several megawatts of electricity, which is then integrated into the grid. All photovoltaic modules can be connected in parallel with multiplexed inverters. A solar power plant requires thousands of solar panels, and engineering personnel must monitor the performance of the entire equipment to ensure the safe and efficient operation of the photovoltaic system.

   A solar power plant requires thousands of solar panels, and the performance of the entire equipment must be monitored to track whether the photovoltaic panels have reached high power point (MPP), in order to ensure the overall efficiency of the photovoltaic system. The photovoltaic system includes photovoltaic modules, combiner boxes, and grid connected inverters. Each component needs to monitor current and voltage to evaluate the efficiency and safety of the system. When multiple photovoltaic modules are connected in parallel to the inverter through an intelligent combiner box, the working current of each photovoltaic group can be detected to effectively monitor the working status of the photovoltaic modules and obtain real-time tracking of the photovoltaic system through current sensors to achieve system monitoring and protection purposes.

 

       Under the influence of the global energy crisis, solar energy has become one of the main choices for people to alleviate the energy crisis. Photovoltaic grid connected power generation is currently an important way for people to use solar energy. The traditional centralized photovoltaic grid connected system is composed of many closely connected solar panels. These panels are first grouped in series and then connected in parallel to form a photovoltaic array. The direct current generated by the array will flow to the centralized grid connected inverter located on the side of the battery panel, which will complete the DC/AC conversion and connect to the grid, and identify high-power tracking points to optimize the efficiency of the photovoltaic grid connected system. With the maturation and continuous development of technology, the problems of centralized photovoltaic grid connected power generation systems have gradually attracted attention. 

 

     

1) In terms of policies, overseas countries such as the United States, Portugal, and Japan have introduced multiple policies and documents to support the development of energy storage business. On the one hand, they provide certain subsidies for energy storage projects, and on the other hand, they regulate industry development and relax industry access areas.

2) In terms of economy, with the advancement of battery technology and cost reduction, the cost of energy storage has significantly decreased. We expect the cost of energy storage systems to decrease from 1.78 yuan in 2019 to 1.16 yuan in 2025. In the long run, after the cancellation of energy storage subsidies, the economic improvement of energy storage systems is the core support for the long-term growth of energy storage demand.

The high growth rate of energy storage business can be maintained in the long term. The global household energy storage market has a space of over 2000GWh, with only 20GWh of global energy storage shipments in 2020.