Group 1 - The core viewpoint of the articles is the launch of the DT-1500PV multifunctional photovoltaic I-V curve tester by Huashengchang, which enhances the company's testing technology and competitiveness in the photovoltaic industry [1][2] - The DT-1500PV features real-time display of I-V curves on a high-definition color screen, supports online data reading, and allows for continuous testing with a single connection, making it suitable for various testing scenarios [1] - The product aims to support the "dual carbon" goals and promote sustainable development in the photovoltaic industry, transitioning the company from a single product provider to a comprehensive energy technology service provider [1] Group 2 - Huashengchang specializes in the research, development, production, and sales of testing and measurement instruments, focusing on high precision and specialized needs for specific industries [2] - The company has developed a series of professional instruments and testing devices for the photovoltaic sector, including tools for solar component installation, inverter maintenance, and energy storage system regulation [2] - The product line includes energy quality clamp meters and specialized solar irradiance meters, which help improve the overall performance and lifespan of photovoltaic systems while maximizing energy generation efficiency [2]