• SOGOOD: How long do residential solar batteries last?
    Sep 20, 2023
    Residential energy storage has become an increasingly popular feature of home solar. A recent SunPower survey of more than 1,500 households found that about 40% of Americans worry about power outages on a regular basis.Of the survey respondents actively considering solar for their homes, 70% said they planned to include a battery energy storage system. Besides providing backup power during outages, many batteries are integrated with technology that allows for intelligent scheduling of the import and export of energy. The goal is to maximize the value of the home’s solar system. And, some batteries are optimized to integrate an electric vehicle charger. Life of a battery Warranty periods can offer a look in installer and manufacturer expectations of the life of a battery. Common warranty periods are typically around 10 years. The warranty for the Enphase IQ Battery, for instance, ends at 10 years or 7,300 cycles, whatever occurs first. Maintenance It is recommended by the National Renewable Energy Laboratory (NREL) to install a battery in a cool, dry place, preferably a garage, where the impact of a fire (a small, but non-zero threat) may be minimized. Batteries and components around them should have proper spacing to allow cooling, and regular maintenance check-ups can be helpful in ensuring optimal operation.
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  • Europe: Photovoltaic agriculture has become a major development trend in the future
    Sep 21, 2023
    In Europe, photovoltaic agriculture has become a hot topic and continues to heat up. Both the French and German governments have designated photovoltaic agricultural technology as a core pillar of their energy strategies, demonstrating the major trend and mainstream status of photovoltaic agriculture in future agricultural development. Germany, France and Italy have established legal frameworks for photovoltaic agriculture, which is very helpful for the development of the industry,that are strategically implemented to benefit all parties impacted by the projects, including landowners, farmers, and surrounding community members.
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  • Offshore photovoltaic "assembly": restless ambitions and problems to be solved 1
    Sep 27, 2023
    From land to sea: offshore photovoltaics have obvious advantages Offshore photovoltaics are photovoltaic power stations built on the ocean. Compared with ground-based photovoltaics, offshore photovoltaics occupy less land but generate 5%-10% more power. This is because the water surface is open and unobstructed, the sunshine hours are long and the light reflected from the water surface is reflected. In addition, offshore photovoltaics can be easily integrated with other industries such as wind power, aquaculture, and hydrogen production to generate more economic value.   Our country has 18,000 kilometers of mainland coastline, but most of the coastal provinces are industrially developed and are in short supply of electricity and land resources. They can only rely on external power purchases and other methods to solve the power shortage problem for a long time. During peak power consumption, power shortages are inevitable. The development of offshore photovoltaic power stations can achieve nearby consumption and alleviate the power shortage problem in the eastern coastal provinces.   Actual demand and potential possibilities make both the central government and the eastern coastal provinces very optimistic about offshore photovoltaics.   Cui Lin, deputy director of the Ocean Energy Development Center of the National Ocean Technology Center, once said that the sea area where my country has installed offshore photovoltaics is about 710,000 square kilometers. Based on an estimate of 1/1000, more than 70GW of offshore photovoltaics can be installed.   Sun Yunlin told reporters that the application scenarios of offshore photovoltaics include coastal beaches, offshore areas, mid-sea areas and offshore areas. The construction of photovoltaic projects in different sea areas faces different difficulties.   To enter offshore photovoltaic, we must first confirm the rights to use the sea for the project. Public information shows that by May 2022, my country has confirmed a total of 28 offshore photovoltaic sea-use projects, with a cumulative confirmed area of ​​1,658.33 hectares, involving five provinces: Jiangsu, Shandong, Zhejiang, Liaoning, and Guangdong.   In 2022, Shandong and Zhejiang provinces have successively issued regulations for sea use of photovoltaic projects, making detailed provisions on many photovoltaic sea use issues such as sea use site selection, sea use methods and sea use scope, sea area use demonstration, planning and layout, etc. Liaoning, Hainan, and Tianjin have also introduced relevant policies for the ocean photovoltaic industry.   Among them, Shandong is the most active in encouraging the development and construction of offshore photovoltaics. In 2022, it will continuously issue documents to promote offshore wind and solar development.   In June 2022, Qingdao City, Shandong Province issued the "Notice on Several Policies and Measures to Stimulate Market Vitality and Stabilize Economic Growth" and its interpretation, clearly proposing to attract more social capital to support the development and construction of offshore photovoltaic and offshore wind power in a market-oriented manner.   In July 2022, the "Shandong Province Offshore Photovoltaic Construction Project Action Plan" released by the Shandong Provincial Energy Bureau mentioned that two major 10-million-kilowatt offshore photovoltaic bases will be built "around the Bohai Sea" and "along the Yellow Sea". Among them, the "Bohai Rim" 10-million-kilowatt offshore photovoltaic base has 31 offshore photovoltaic sites with a total installed capacity of 19.3 million kilowatts. "Along the Yellow Sea" 10-million-kilowatt offshore photovoltaic base has laid out 26 offshore photovoltaic sites with a total installed capacity of 22.7 million kilowatts.   As of July 2022, Shandong has launched the development of 11.25 million kilowatt projects at a total of 10 sites in Binzhou, Weifang, Dongying, Yantai, Weihai, Qingdao and other sea areas.   The reporter noticed that following the policy, many companies have entered this blue ocean.   In the competitive configuration list of 10 offshore photovoltaic projects announced by Shandong Province in October 2022, the selected companies include central state-owned enterprises such as China National Energy Group, China General Nuclear Power Group, China Power Construction Group, and Shandong Energy Group, as well as Longi Green Energy ( Private photovoltaic giants such as SH:601012), Trina Solar (SH:688599), and Chint New Energy (SH:601877).   Sun Yunlin told reporters that there are currently two main categories of companies deploying offshore photovoltaic projects: one is photovoltaic equipment manufacturers, and the other is manufacturers of floating bodies and anchoring systems. Inverter companies, engineering companies, etc. have also made technical reserves in the offshore photovoltaic field.     Everbright Securities has calculated the relevant market space. "Under optimistic assumptions, the market space for floating bodies and anchoring systems of marine photovoltaic power stations in Shandong Province alone will be 27.2 billion yuan and 1.9 billion yuan respectively."
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  • Offshore photovoltaic "assembly": restless ambitions and problems to be solved 2
    Sep 28, 2023
    Verification Demonstration: Floating power stations are mainstream   The ground photovoltaic bracket market has developed very maturely. So, how to install photovoltaic modules on the sea?   my country's coastal terrain is complex, the climate is different, and the sea surface environment has its own particularities. In order to adapt to the complex environment of the sea, there are currently two methods of offshore photovoltaic construction: pile-based fixed photovoltaic power stations and floating photovoltaic power stations.   Pile-based fixed photovoltaic power stations are suitable for tidal flat sites with water depths less than 5 meters, geological stability, and small water level changes. They are currently the mainstream of offshore photovoltaic construction. The aforementioned 11.25 million kilowatt projects at 10 sites in Shandong fall into this category.   Floating photovoltaic power stations use floating materials and anchoring systems to float photovoltaic modules, inverters and other power generation equipment on the sea to generate electricity. They are suitable for waters with water depths greater than 5 meters and that are not greatly affected by typhoons.   Although the development of floating technology is relatively late, it is recognized by the industry as a technological direction with greater development potential. The reason is that its application scenarios are wider and environmental problems are smaller.   From a global perspective, floating photovoltaic power plants are also a trend. According to media reports, more than 60 countries around the world are currently actively promoting the construction of offshore floating photovoltaic power stations, of which more than 35 countries have 350 floating photovoltaic power stations. According to a study published by the research organization Global Industry Analysts, the installed floating photovoltaic capacity deployed globally in 2021 will be 1.6GW and is expected to grow to 4.8GW by 2026.   At present, China's offshore floating photovoltaic power plants are still in the demonstration stage.   On October 31, 2022, the 20-MW deep-sea floating photovoltaic 500-kilowatt demonstration project of the Shandong Peninsula South No. 3 offshore wind farm successfully completed power generation and became the first deep-sea wind and solar floating photovoltaic demonstration project on the same site. State Power Investment Corporation is The project leader.     This project chose the "deep sea" scenario with the greatest challenge. The project is built on the sea 30 kilometers offshore and with a water depth of 30 meters. Workers installed 770 photovoltaic modules on a ring-shaped floating unit with a diameter of 53 meters and an area equivalent to four standard basketball courts. After the clean electric energy was collected in the inverter, it was sent to the Peninsula South No. 3 wind turbine platform operating on the same site. It is then sent to the power grid through an offshore booster station.
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  • Offshore photovoltaic "assembly": restless ambitions and problems to be solved 3
    Oct 09, 2023
    Difficulties abound: Many difficulties and obstacles need to be overcome Although the prospects of offshore photovoltaics are promising, it faces all-round challenges, including cost technology, environment, policy and many other problems that need to be overcome. High temperature, high humidity, high salt spray at sea, soft tidal flat soil, and long-term impact by wind, waves, tides, etc., place high requirements on the anti-corrosion and safety construction of photovoltaic power plants.   Taking the current mainstream technology route—pile-based fixed photovoltaic power stations as an example—in the northern seas, ice may hit the component array.   Floating photovoltaic power plants also face challenges from the sea. Tan Qitite, president of Jinko Technology Design and Research Institute, once wrote in an article that “the wind waves and wind speeds faced by offshore floating systems are much greater than those of inland lakes, and the superimposed tide level has a greater impact, so offshore floating systems are more inclined to comprehensive marine engineering. "   From a technical point of view, Sun Yunlin told reporters that the construction of offshore photovoltaic power stations requires the completion of "seven prevention" designs such as typhoon prevention, tide prevention, wave prevention, ice floating prevention, corrosion prevention, erosion prevention, and biological adhesion prevention. The complexity and difficulty are All are larger.   It is understood that the large-scale development of offshore photovoltaics is still in its infancy globally. Not only key technologies such as wave resistance, sea ice resistance, cold wave resistance, and salt spray resistance are in urgent need of breakthroughs, but also engineering design, construction, post-operation and maintenance, etc. There is also a lack of industry standards in this link. Both the early construction and development and the later operation and maintenance of offshore photovoltaics are much more difficult to promote than onshore photovoltaic power stations.   A series of difficulties have raised the construction costs of offshore photovoltaic power stations. A design institute in the industry found through a comparison of investments in conventional ground power stations and offshore power stations that, assuming the same type of modules are installed, the cost per watt of offshore photovoltaic module installation, bracket installation and pile foundation are respectively about 0.05 yuan and 0.05 yuan higher than those of ground power stations. 0.636 yuan and 0.679 yuan, the comprehensive additional cost is more than 1.365 yuan/watt higher.   According to calculations by the International Renewable Energy Agency, the construction cost of offshore photovoltaic power stations is about 5%-12% higher than that of onshore photovoltaic power stations. Among them, the cost of floating photovoltaic power stations is higher. Industry insiders have revealed that the raw material cost of floating photovoltaic power stations is 10%-30% higher than that of conventional photovoltaics.   Even the experimental investment in offshore photovoltaic power stations is expensive. Take the country's first offshore floating photovoltaic power station - Hainan Wanning offshore floating photovoltaic power station demonstration project as an example. This rectangular photovoltaic array project with a width of 30 meters and a length of 50 meters has only been in operation for more than ten days because it is a pilot project. , it was dismantled in accordance with relevant regulations. According to Zhang Xiaoming, the project leader and executive director and general manager of Zhongneng Zhongcheng New Energy Technology Co., Ltd., "a total of more than 4 million yuan was spent."   Sun Yunlin also said that from the perspective of the entire industry, unit investment cost is currently the biggest obstacle restricting the development of offshore photovoltaics. At this stage, the return rate of simple floating photovoltaic projects on the sea generally cannot meet the return rate requirements of investment companies.   Faced with these difficulties, the good news is that some local governments are gradually introducing encouraging and supporting policies. Taking Shandong Province as an example, it is clearly proposed that for floating offshore photovoltaic projects completed and connected to the grid between 2022 and 2025, the provincial finance will provide subsidies at the standards of 1,000 yuan, 800 yuan, 600 yuan, and 400 yuan per kilowatt respectively, and the subsidy scale shall not exceed 100,000 kilowatts, 200,000 kilowatts, 300,000 kilowatts, and 400,000 kilowatts.   On the corporate side, we are also promoting technology research and development and launching new products and achievements based on the characteristics of the marine environment. For example, Tongwei's TNC technology double-glass modules have obtained offshore photovoltaic certification from TV Nord Group; Trina Solar's Supreme series modules have obtained TV Rheinland offshore photovoltaic certification. This shows that my country’s offshore photovoltaic module products have been able to cope with the severe challenges from the marine environment.   In response to offshore operation and maintenance problems, LONGi Green Energy announced in April this year that it had developed a set of intelligent operation and maintenance technologies. As long as you enter the sea area in the software and fill in basic data such as wave height, wind speed, silt layer thickness, temperature, etc., the system will give an optimized design plan, such as the optimal inclination angle of the component bracket, how to arrange the array, etc. .   Construction costs, which the industry is concerned about, are also constantly decreasing. According to Tan Qitite, president of Jinko Technology Research Institute, the cost of floating and anchoring systems used in domestic floating photovoltaic power plants has dropped from the previous 1.5 yuan/W to about 0.6 yuan/W. According to Everbright Securities’ prediction, with the continuous advancement of offshore floating photovoltaic technology and the scale effect brought about by the increase in installed capacity, the cost of a single watt of the corresponding power station will drop from 10 yuan/watt to 4.25 yuan/watt.     It is still too early to say that the "turbulence" has arrived, but offshore photovoltaics is full of imaginative development prospects and is attracting more and more entrants. As technical obstacles and cost problems are gradually overcome, offshore photovoltaics will become a subdivided application scenario with unlimited opportunities and contribute to the achievement of the dual carbon goal.
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  • What are the common knowledge about PV roofs? What are the wrong perceptions?
    Mar 23, 2023
    Common Knowledge:   1. PV mounting tile roofs are an efficient way to generate electricity from the sun.   2. Solar Roof Mounting System can reduce your energy bills and help you save money on your electricity costs.   3. PV roofs require little to no maintenance and can last for decades with proper care.   4. PV roofs can be installed on almost any type of roof, including flat or sloped surfaces.   5. PV roofs can be integrated into existing electrical systems and used to power appliances and other devices in your home or business.   6. PV roofs are a great way to reduce your carbon footprint and contribute to a cleaner environment.   7. PV roofs may qualify for tax credits or other incentives in some areas, making them even more cost-effective over time.   Wrong Perceptions:   1. PV system for roofs are too expensive - While the upfront cost of installing a PV roof may seem high, it is often offset by the long-term savings on energy bills and other incentives that may be available in some areas.   2. PV roofs require a lot of maintenance - In reality, most modern systems require very little maintenance and can last for decades with proper care and regular cleaning and inspection of the system components.   3. Solar panels will damage my roof - With proper installation techniques, solar panels should not cause any damage to your roof or its structure, as long as they are installed correctly by a qualified professional installer who is familiar with the specific requirements of your roof type and climate conditions in your area
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  • The most common misconceptions about residential PV
    Apr 20, 2023
    So Good does not agree with the view that a south-facing roof is always more suitable for a solar photovoltaic system than an east-west facing roof. Photovoltaic power generation is not only about producing as much electricity as possible, but also about meeting a constant demand for electricity. A PV system installed on an east-west facing roof will only generate around 80% of its annual electricity compared to a south facing roof. However, the power generated by a solar power system installed on an east-west facing roof can be spread over the whole day, as the system still receives a lot of sunlight in the morning and evening.   Many homeowners whose homes do not have a roof on which to install a PV system solutions will often consider investing in a plug-in solar system. These can be installed either on the balcony or in the garden. However, occupants may be disappointed if they expect them to power household appliances such as coffee machines.   "These panels are particularly well suited to covering the base load of a home," White explains, "where the electricity is used directly, for example, for a telephone, an internet router or an alarm clock radio."   More of the electricity demand will be supplied by the grid. For example, a coffee machine requires around 2,000 W to boil water for heating. According to So Good, this cannot be achieved with balcony photovoltaic modules alone.
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  • So Good Energy launches new photovoltaic solar balcony bracket
    Jun 23, 2023
    The new product developed by So Good Energy, the balcony adjustable solar racking has already passed the CE certification of the European Union. At the same time, the weight is lighter, making it easier to install the solar racking while obtaining a more beautiful outer tube; advantage three, the products are pre-assembled, saving you installation steps and reducing your installation time. For the launch of this new product, So Good Energy will also provide you with one-to-one installation service guidance and be available to you online 24 hours a day.
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