Why solar lighting system is difficult to promote?

“Going out on the outskirts, the future can carry portable solar modules to charge mobile phones,” and “Natural showers on the beach can be powered by solar energy”... At present, the application of solar energy technology is closer to the people’s lives, but solar energy is really going Entering every family’s home has become an indispensable alternative energy source for daily living and lighting, and there is still some way to go.

Also need to strengthen popular science, overcome technical difficulties, reduce costs

How close is solar energy to the lives of ordinary citizens? What is the development of the solar energy industry and its application in the daily life of citizens? Why is it difficult to popularize solar roof lighting systems for urban residents? The reporter learned from experts in the industry that the application space and industrial development space of solar energy are enormous and will be the future development trend. However, large-scale applications still need to strengthen popular science, overcome technical difficulties, and support related policies.

Solar energy science needs further promotion

“Solar energy is getting closer and closer to ordinary people's lives, but most people don’t have intuitive feelings about it.” Zhang Jian, Secretary-General of Shenzhen Solar Energy Society, told reporters, such as the solar street lights on the Shenzhen Binhai Avenue, located in “Garden Expo”. Shenzhen's 1 MW grid-connected solar photovoltaic power station and the underground garage of the solar lighting just completed by the Civic Center are closely related to solar energy.

Solar energy can be linked with our food, clothing, housing and transportation, including “organic vegetables” that residents can buy in supermarkets. They may use solar-powered “pesticidal lamps” to prevent insects, and solar energy “shaking head dolls” that are easily available to the public. Solar product applications. Zhang Xin believes that these new and practical products have brought new energy sources closer to the ordinary people and are a good breakthrough point. They conform to a customer-oriented market and lay a good foundation for solar energy companies to start the domestic market and further expand the international market. Foundation. In daily life, ordinary people's application of solar energy is still limited to "solar water heaters", and solar energy lighting and photovoltaic building integration are still not well understood. This shows that solar energy science needs to be further promoted.

There are technical difficulties that need to be overcome

Is it difficult to let the sun give our room direct "illumination"? The reporter learned from the interview that, first of all, most of the buildings did not take into account the needs of solar panel installation. Solar panels must be integrated with the building in order to promote solar roof lighting.

Zhou Min, chairman of Shenzhen Allianz Allian, told a reporter that under the current conditions of solar panel conversion efficiency, building a solar roof power station is inefficient and requires a lot of building roof resources, while the city’s building roof is very expensive and Scarce, it is difficult to provide the space needed for the construction of solar panels for power stations; at the same time, the economic benefits are also low. The average investment recovery period of rooftop power stations needs to be more than 40 years, and the average lifetime of solar photovoltaics is only 20 years. Investment and return Can't match.

Zhou Minyi, for example, said that for ordinary residents, most of them are living in high-rise buildings. Due to the restrictions of living space, it is not easy to place solar panels in suitable places. When solar water heaters are installed on the roof, they lose solar panels. The space and opportunities; Secondly, the cost of 10 square meters of panels is at least 50,000 yuan, and the amount of electricity generated is not enough to meet the needs of the entire family. In the future, “photovoltaic architecture” combining photovoltaic power generation and buildings is a general trend. However, under current conditions, urban residents use solar energy lighting, and most of them are first promoted in public space.

Hope for further reduction of costs

"Solar solar thermal utilization is a very strong policy industry." Liu Xu said that many countries have introduced relevant subsidies and incentives for the solar industry. The reporter was informed that from March 2009, the Chinese government decided to allocate about 10 billion yuan annually from the government to provide subsidies for the construction of solar roofs and photovoltaic buildings to promote the formation of a domestic solar power market.

"But we must see that these preferential policies are only an encouraging gesture." Zhou Minyi said that the use of advanced technology and advanced products in commercial use depends on the degree of price acceptance for the market rather than government subsidies. How many. “At present, one of the major factors restricting solar energy for large-scale civil use is cost and reducing costs is the top priority. Significantly increasing the efficiency and efficiency of photovoltaic power generation is an important way to reduce costs.” Zhou Minyi said, “Once a price bottleneck is broken, The application of solar energy cannot be imagined."

Liu Xu also believes that solar companies cannot rely on the government's financial support alone. They must explore new business models, meet the needs of users without increasing the burden on users, and use their own innovative technologies and products to guide market demand.