The photovoltaic system is generally composed of photovoltaic modules, solar controllers, batteries, inverters and loads. Photovoltaic modules convert solar energy into electricity when there is light, and supply power to the load through the solar controller and charge the battery at the same time. When there is no light, the battery pack supplies power to the DC load through the solar controller, and the battery also supplies power to the AC load through the inverter.

The 10th anniversary of the Belt and Road Initiative. Over the past decade, China has worked with other Belt and Road countries and international organizations to establish cooperation mechanisms on solar energy systems and low-carbon development. Today, the concept of green development is constantly gaining popularity, international cooperation platforms are constantly improving, and practical cooperation initiatives are constantly deepening, the cooperation projects in the fields of green infrastructure, green energy, green transportation and green finance are changing from the vision to the reality. "Green is becoming a bright background for the 'Belt and Road' initiative," said director of thed Department of International Co-operation at the Ministry of Ecology and environment. "In the future, China will continue to Polish its 'Belt and Road' green

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As the name implies, the inverter is a kind of equipment that combines the controller and inverter together. It can not only control the solar panel to charge the battery and use the battery to power the inverter, but also play a role of over-charge and over-discharge protection for the battery, and can transform direct current into alternating current.

Photovoltaic energy storage power generation system, according to different types, generally consists of photovoltaic square array, solar controller and inverter (grid-connected inverter and energy storage inverter), battery bank and battery management device BMS, monitoring and energy management system EMS and load, etc.