Installation of new energy equipment and solar energy equipment; E-commerce business; domestic trade、 Import and export of goods and technology。 Sales of photovoltaic equipment and components; Hardware wholesale; Hardware product retail; Sales of distribution switch control equipment; Mechanical and electrical equipment sales; Battery Sales; Lighting fixture sales; Battery spare parts sales; Engineering and technical research and experimental development; Wind farm related system research and development; R&D of distribution switch control equipment; Hardware product research and development; electric wire、 Cable Operations; Metal structure sales; Pump and vacuum equipment sales; Daily sundry goods sales; Sales of power electronic components; Sales of teaching equipment。( Except for projects that require approval according to law, Carry out business activities independently in accordance with the law with a business license)^ Pump and vacuum equipment manufacturing; Manufacturing of special equipment for electrical machinery; Distribution switch control equipment manufacturing; Photovoltaic equipment and components manufacturing; Power electronic components manufacturing; Manufacturing of special teaching instruments; transformer、 Rectifier and inductor manufacturing; solar energy、 Technology development of optoelectronic and new energy products、 Production and sales; Technology development of electronic and lighting products、 Production and sales;Photovoltaic power station grid-connected power generation equipment、 Wind and solar hybrid power generation equipment、 Technical consultation for high and low voltage electrical equipment、 Development, design, production and sales; Technical consultation on building energy-saving equipment、 Development, design, production and sales; Technical consultation on new energy electric vehicle charging and swapping systems and products、 Development, design, production and sales; Technical consultation for integrated power supply equipment、 Development, design, production and sales。