欧美拍拍视频免费大全,2021中文日产幕无线,久久久久亚洲AV无码专区首JN,欧美黑人粗暴多交高潮水最多

New energy storage installations will exceed 4 million kilowatts. China's new-type energy storage capacity is expected to exceed 4 million kilowatts by the end of this year, Liu Yafang, deputy director of the National Energy Administration's science and technology equipment department,

Photovoltaic power generation (PV) is a technology that converts light energy directly into electric energy by using the photogenerating volt effect of semiconductor interface. It is mainly composed of solar panels (components), controllers and inverters, and the main components are composed of electronic components. Solar cells are packaged and protected in series to form large-area solar cell modules, and then combined with power controllers and other components to form photovoltaic power generation devices.

If light hits the solar cell and is absorbed at the interface layer, photons with enough energy can excite electrons from covalent bonds in both p-type and N-type silicon to create electron-hole pairs. Electrons and holes near the interface layer will be separated from each other by an electric field of space charges before recombining. The electrons move toward the positively charged N region and the holes toward the negatively charged P region.