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Jiangsu Province has the largest installed capacity of distributed photovoltaic power generation in China.
Release time:
2016-11-07
On November 4th, the Paris Agreement on global climate change came into effect. This news was closely watched at the 8th China (Wuxi) International New Energy Conference held in Wuxi. In response to global climate change, what can we do? Building a power station on the roof might be a good choice.
On November 4th, the global climate change Paris Agreement came into effect. This news was highly regarded at the 8th China (Wuxi) International New Energy Conference held in Wuxi. In response to global climate change, what can we do? Building a power station on the roof might be a good option.
Rooftop Solar Power Generation Exceeds 1 Billion kWh
By September of this year, the rooftop photovoltaic power station of Wuxi Tianshan Foundry Materials Co., Ltd. had successfully connected to the grid and operated continuously without failure for one year. Xue Longping, the company's head, explained the financial benefits to the reporter: The company invested 2.15 million yuan in the rooftop photovoltaic power generation project. After connecting to the grid, it generates more than 1,000 kWh of electricity per day, supplying the company's own operations and saving some electricity costs. In addition to the 0.42 yuan per kWh national subsidy, the power generation system generates more than 40,000 yuan in profit per month, and it is estimated that the cost will be recovered in four years. Based on a 25-year lifespan for a photovoltaic system, the remaining 20 years will directly generate profits for the company. In addition to economic benefits, the environmental benefits make Xue Longping even prouder. "The company's annual photovoltaic power generation of more than 300,000 kWh is equivalent to reducing carbon dioxide emissions by more than 100 tons and planting more than 1,000 trees for the city."
Distributed photovoltaic power generation is a green energy production method that uses photovoltaic components to directly convert solar energy into electricity. Building rooftops are its primary application sites. Because the rooftops covered with photovoltaic panels shine brightly in the sun, appearing golden, distributed photovoltaic power stations are also known as "golden roofs." It is estimated that the emission reduction effect of installing 1 square meter of photovoltaic power generation equipment on the roof is equivalent to 100 square meters of public green space; every 10,000 kWh of power generation can save 4 tons of coal for power generation, reduce carbon dioxide emissions by 10 tons, and reduce sulfur dioxide emissions by 0.3 tons, which is equivalent to afforestation of 80 mu (approximately 5.3 hectares).
Wuxi already has more than 360 idle rooftops equipped with rooftop photovoltaic power generation systems. As a major energy-consuming province in China, Jiangsu has become the province with the largest cumulative installed capacity of distributed photovoltaic power generation in the country. Currently, the province's photovoltaic grid-connected electricity generation exceeds 1 billion kWh, and all the generated electricity is fully absorbed by the power grid.
Cost Reduced by 70%, "Golden Roofs" Become a "Blue Ocean"
"Golden roofs" have only truly entered the homes of ordinary people in recent years.
Over the past 10 years, the price of photovoltaic systems has dropped from 60 yuan/watt to 7 yuan/watt; the photovoltaic electricity price has dropped from nearly 3 yuan/kWh to 0.7 yuan, a decrease of more than 76%. Rooftop power stations have become affordable for ordinary people." Xu Huijuan, president of the Wuxi Municipal Council for the Promotion of International Trade, told reporters that based on a usable rooftop area of 40-50 square meters, the installed capacity is 5 kW, and the installation cost is about 30,000 to 40,000 yuan. Based on the average annual sunshine hours of 1200 hours in Jiangsu Province, the annual power generation is more than 5,000 kWh. Currently, for distributed photovoltaic electricity prices, the national subsidy is 0.42 yuan per kWh, and the grid-connected electricity price is fully purchased by the power supply company at a price of 0.378 yuan per kWh. Therefore, for ordinary families, the payback period for installing a system is 7 to 8 years, and the subsequent 10 years will be pure profit; for high-energy-consuming enterprises with high electricity consumption, the payback period is shorter.
The significant reduction in the construction and use costs of rooftop power stations has also made "golden roofs" a "blue ocean" market that the industry is vying to enter. China’s largest photovoltaic power station developer and operator, GCL New Energy, recently launched the "Xin Rooftops" project for rooftop photovoltaic power stations. Qian Wei, the investment director for distributed business at the company, told reporters that "Xin Rooftops" mainly provides one-stop services for household distributed photovoltaic power stations, from planning and construction to operation and maintenance. In Jiangsu Province, projects totaling 100 megawatts have been launched in Suqian, Haian, Yangzhou, and Suzhou. Far-reaching Energy and Wuxi Suntech have also recently launched distributed photovoltaic projects. Industry insiders predict that with the acceleration of China's new round of urbanization, the market space for "golden roofs" will expand rapidly.
"Energy Internet" Activates Green Life
"In the near future, hundreds of millions of people around the world will be able to produce renewable energy at home and in the office. This energy will not only power their homes, machines, and cars, but they will also be able to share it with others." Academician Chu Junhao, a researcher at the Shanghai Institute of Physics, Chinese Academy of Sciences, gave an example, saying that according to average usage, a 3 kW power station can meet the needs of a family. During peak hours, when air conditioners, televisions, washing machines, and rice cookers are turned on simultaneously, an overload occurs. This requires an "energy router" that stores excess energy during off-peak times and exchanges electricity from other places when it is insufficient, thereby achieving efficient energy utilization throughout society.
In addition to villas and self-built houses with clear rooftop ownership, ordinary urban apartment building owners who want to enjoy the benefits of solar energy must first clarify the issue of "who owns the roof." Currently, the rooftop ownership of apartment buildings mostly belongs to all floor owners, and the photovoltaic system can only be installed after obtaining the consent of all owners and obtaining their written signatures. Experts and industry insiders suggest that apartment buildings can integrate photovoltaic systems into the roof, balcony, and curtain wall structures during the design phase, clarifying the ownership; the electricity generated by the system can be used for public electricity consumption, and the income from electricity sales and subsidies can be used for public maintenance funds. The photovoltaic system and house ownership can also be sold separately to owners, allowing owners to use it independently and feed excess electricity into the grid. At that time, sunlight will not only provide lighting and heating but also generate financial returns.
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