Japan's 2.96 billion yen to build solar roofs saves more money

In July, Japan will host the G8 summit in Hokkaido. Previously, the Hokkaido Development Bureau announced the blueprint for the construction of an international media center under construction. What is striking is that Japan invested 2.96 billion yen in one fell swoop and installed translucent solar panels on the roof of the media center of about 11,000 square meters. The power generation is used by the media center.

At a summit where environmental protection is one of the main topics, Japan’s move naturally shows its heart for environmental protection, but it does not stop there. It is no exaggeration to say that the use of solar power in Japan has formed a market with a wide market.

Excess electricity can be sold out

The home of Mizuno Shinichi of Hashima City, Gifu Prefecture is a two-story building with a total area of ​​approximately 155 square meters. Since the installation of 4 kW solar cells in 1995, it has been more than 10 years since the total power generation has exceeded 3,000 degrees. In an interview with the media, Mr. Mizuno said that in addition to the need to spend money to buy electricity in the winter, the usual electricity demand can be met. In the summer, there is a surplus of electricity, and it is also possible to sell surplus electricity to the power company at a relatively high price.

For the Mizuno family, installing solar cells can save 200,000 yen in electricity bills a year. According to the installation cost of 3.2 million yen at that time, the cost can be recovered in about 16 years. The life of a solar cell can sometimes exceed the building itself, which is very cost-effective in the long run.

It is no wonder that the enthusiasm of Japanese people to install solar cells in recent years has gradually increased. According to "Tokyo News", in 1994, the total installed capacity of solar cells in Japanese households was only 7,000 kilowatts; by 2005, the total installed power generation capacity had soared to 290,000 kilowatts. According to statistics, about 400,000 households currently have solar power generation equipment with a total generating capacity of 1.3 million kilowatts.

At present, the average cost of installing solar power generation equipment for household use in Japan is 2 million yen (about 140,000 yuan), and the average cost of power generation is 1 kilowatt, which is 47 yen (about 3.5 yuan), and the cost is relatively high. On December 30, 2007, the Japanese government formulated a policy of universalizing solar power generation. It plans to expand the number of households installing solar power generation equipment to 14 million in 2030, that is, 30% of households in Japan, with a total power generation capacity of 30 times. .

The Japanese government plans to invest 2 billion yen in 2008. By developing new technologies, the solar power generation efficiency will be increased to two to three times by 2030, and the power generation cost will be reduced to 1 kilowatt and 7 yen (about 0.5 yuan). Close to the cost of power generation from thermal power generation.

Enterprises are large solar power producers

Japanese companies are also big consumers of solar cells.

Sharp, which has a high reputation in China, installed huge solar panels in its LCD TV factory in Mie Prefecture. These panels are distributed in the roofs, windows, and even pools of the factory, with a total area of ​​47,000 square meters and a total power of 5,150 kilowatts. The power generation capacity can be used by 1,300 ordinary households. It is worth mentioning that the panels installed on the windows can not only illuminate, generate electricity, but also intercept most of the heat, which can reduce the indoor temperature in summer.

Another typical example is the cosmetics manufacturer Rechunkan Pharmaceutical Institute. It installed 9,400 solar cells in its factory building and headquarters building. At first glance, it is spectacular. It is one of the largest solar power generation facilities in Japan, and its power generation can meet 22% of the company's electricity consumption throughout the year. the amount.

It has also been noticed that some supermarket chains have begun to install solar cells in order to reduce greenhouse gas emissions. In addition, the use of solar power in some schools in Japan is more interesting and interesting. In 2007, Sanmu Elementary School in Kaga City, Ishikawa Prefecture, Japan, with only 60 children installed a miniature solar cell, 1.2 meters long and 0.53 meters wide. The maximum power generation is only 70 watts. The purpose of generating electricity is to sharpen pencils.

At present, the Japanese government is investing 7 billion yen to build Japan's largest solar power generation facility in Wakkanai City, Hokkaido. It is planned to be completed by 2010, and the power generation capacity will reach 5,000 kilowatts, which will become the world's third largest solar power generation equipment.

Solar cell development encounters bottleneck

On March 29th, a survey from a US solar cell industry newspaper showed that before 2007, Japan had been the world's leader in solar cell production. This year, the throne was handed over to Europe.

There are reasons behind this situation. First, countries such as Germany, Spain, Greece, and South Korea began to implement policies that encourage solar cell power generation, requiring power companies to acquire solar-powered solar cells at high prices, leading to an expansion of the international solar cell market. Japanese manufacturers are not keeping pace with the procurement of raw materials, and production expansion is limited. Although the market share of solar power generation equipment produced by Sharp Corporation and other Japanese manufacturers is large, most of them are exported overseas, and the domestic popularity in Japan is slightly slow.

Second, the Japanese government abolished the subsidy for installing solar cells in the home in 2005, which also caused the Japanese domestic market to shrink.



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