Title: 4.5hp and kWh: Exploring the application and development of solar power generation in Cambodia I. Introduction With the transformation of the global energy structure, renewable energy has gradually become the focus of attention of all countries. As one of the most widespread renewable energy sources, solar energy has been vigorously promoted and applied worldwide. In this article, we will introduce the concept of 4.5hp and kWh and their application in the field of solar power generation, and discuss the development of solar power generation in Cambodia. 2. Understand 4.5hp and kWh 1. The concept of hp and kW: hp is the abbreviation of horsepower, which is a unit of power; kW is an abbreviation for kilowatt and a unit of power. The conversion relationship between the two is: 1hp ≈0.74kW. Therefore, 4.5 hp is equivalent to about 3.3 kW. 2. Meaning of kWh: kWh is the abbreviation of kilowatthour, which indicates a unit of electrical energy. In a solar power system, kWh represents the electrical energy generated by the system. 3. The application and importance of solar power generation Solar power generation is the process of converting solar energy into electricity using solar panels. With the continuous advancement of technology and the continuous reduction of costs, solar power generation has been widely used worldwide. Solar power generation is clean and sustainable, which is of great significance for alleviating energy tension and reducing greenhouse gas emissions. Fourth, the development of solar power generation in Cambodia As a Southeast Asian country, Cambodia has made significant progress in the field of renewable energy in recent years. The government has strongly supported the development of solar power generation projects, which has promoted the growth of the solar energy industry. In Cambodia, solar power generation is mainly used in the power supply of rural and remote areas, providing a stable source of electricity for local residents. In addition, solar power generation is also widely used in Cambodia's industrial and commercial fields. 5. Explore the application of 4.5hp solar energy system in Cambodia In rural areas of Cambodia, small-scale home solar systems have become an important energy solution. These systems typically consist of solar panels, batteries, and inverters with a power of around a few kW. Therefore, a 4.5hp solar system is suitable for providing electricity supply to homes. Such a system can provide power to home lighting, televisions, pumps and other equipment, improving the living standards of local residents. 6. The significance and optimization strategy of kWh in solar energy system In solar energy systems, kWh is one of the important indicators to measure the performance of the system. Improving the energy efficiency ratio of the system and optimizing the operation and maintenance management can effectively improve the kWh output of the system. In addition, the rational design of the solar system to ensure that it matches the actual application needs is also an important way to increase kWh output. 7. Summary and outlook This article introduces the concept of 4.5hp and kWh and their application in the field of solar power generation, and discusses the development of solar power generation in Cambodia. With the continuous advancement of technology and the continuous reduction of costs, solar power generation has broad prospects for development in Cambodia. In the future, Cambodia will continue to increase investment in the field of renewable energy, promote the further development of the solar energy industry, and contribute to the sustainable development of the country.