It is the developed countries of Europe and the United States and Japan that pioneered the use of solar energy to generate electricity. Since 1969, the world’s first solar power station was built in France. The proportion of solar power generation has gradually increased in Europe and the United States, and solar photovoltaic technology has also been continuously developed. Among them, the EU is the world's largest photovoltaic power generation area. In 2008, this area accounted for 80% of the global photovoltaic power generation. The combined total of photovoltaic power generation in Germany and Spain accounts for about 84% of the EU, and it is a veritable photovoltaic power generation country. These achievements are due to the continuous promotion of the development of the photovoltaic industry in the EU for the past 20 years. The EU expects that solar photovoltaic power generation will account for 12% of the EU's total electricity generation by 2020.
Japan is also a strong country for solar power generation, and it has a very wide range of applications. The average family can use solar photovoltaic devices to generate electricity. Their approach is to use government subsidies to encourage families to purchase home-use photovoltaic power plants. The remaining electricity generated by each household through photovoltaic power generation devices can be sold to the government or power companies. This has led to the continuous increase in the amount of photovoltaic power generation in Japan, which has also led to a significant increase in Japan's energy efficiency.
Although the United States started earlier in the photovoltaic power generation technology, due to the fact that the U.S. government did not attach importance to photovoltaic power generation in the past, even the U.S. photovoltaic power generation has a lower level of power generation and technological innovation than the EU and Japan. However, with the introduction of a series of policies to encourage the development of new energy sources by the Obama administration of the United States, the United States has a great momentum of surpassing the photovoltaic power generation industry. Now, many states in the United States have issued the "Quota Standard for Renewable Energy." In California, for example, homeowners or businesses that install solar energy equipment on the roofs of housing, commercial buildings, or public buildings receive state government subsidies that include a 30% tax reduction and a 30% reduction in installation costs.