Customers are using the electricity customer management system built by EVNICT. Hoang Dung/BNEWS/VNA Specifically, the Corporation promotes the application of digital technology to innovate and improve the management and operation process of the power system; Design experiences to attract more and more customers to interact on digital channels, enhance analytics to understand customers. The Corporation also improves processes, optimizes corporate governance, enhances governance and data-driven decision-making; Build a digitally savvy, conscious and skilled workforce. At the same time, build a strong and flexible digital ecosystem, maximize shared services and data, and enhance security. This transformation, according to EVNSPC’s General Director, aims to improve management capacity and efficient exploitation and operation of the power grid; improve the quality of customer service in the field of electricity business. Besides, improving project management capacity in the field of construction investment; improve internal management capacity; improve telecommunications infrastructure capacity, apply digital technology platforms. In order to carry out the set tasks, EVNSPC has developed specific plans and solutions. One of the remarkable solutions being implemented by the Corporation is the successful deployment of interconnected and integrated shared applications of the Electricity of Vietnam (EVN) according to the roadmap, and at the same time studying develop specific software to meet the requirements of sustainable development of EVNSPC. Along with the coordination to complete the overall monitoring system of information technology and telecommunications infrastructure, used exclusively as a capacity building tool for management consulting and administration on the application and development of science and technology in Vietnam. At all levels throughout EVNSPC, the Corporation also ensures information safety and security at all levels, meeting the readiness for the digital transformation roadmap for the period 2021 – 2022./

At the Hai Phong remote control center, the basic features of the SCADA/DMS central software system have been fully exploited such as: managing the grid information model including managing all the main data of the network. control center, edit or create new single-strand diagram structure of TBA, color grid, edit graphics, batch data import, declare and map signals of equipment at TBA and devices on the distribution grid (Recloser/LBS/FI), set up audio and event alarms, simulate the status of equipment on the grid, store, analyze and exploit historical data on the system. In addition, Hai Phong remote control center is gradually deploying and building a smart grid subsystem (DMS) with grid computing applications such as: load reporting, distribution estimation, capacity flow calculation, fault locating and isolation, etc. Operations Engineer at Remote Control Center The conversion of manned 110kV substations into 110kV unmanned substations helps to promote the application of digital technology, innovate and improve the management and operation process of the power system. As of May 27, 2021, the Company has 07/24 110kV substations operating with unmanned criteria, 09/24 110kV substations operating in remote operation mode with on-site supervision. 70/90 devices (Recloser/LBS) on medium voltage grid are connected and controlled remotely from Hai Phong Remote Control Center. With 99% success rate of remote manipulation ( As planned in 2021 put 110kV and . substations control devices Recloser/LBS rest perform remote control) contributed to improving labor productivity, reducing system operating costs, improving reliability of power supply and ensuring safe grid operation. In early 2021, Hai Phong PC applied digital technology to develop software for automatic ground fault handling. The software is currently being put into trial operation. Automatic ground fault handling software is highly applicable, helping to automate the current ground fault handling process, reducing the time to find fault points, and minimizing the number of customers. affected by incidents, thereby reducing power supply reliability indicators SAIDI, SAIFI, MAIFI, improving power quality, avoiding confusion that may occur due to subjective factors of users caused by operation. Automating the troubleshooting process enhances worker productivity by reducing the dependence of the troubleshooting process on the operator. The software is a premise for the development and expansion of advanced applications in the process of modernizing the distribution grid towards operating the smart grid in Hai Phong city. With efforts and determination to realize the goal of digital transformation, Hai Phong PC in particular and the Power industry in general are gradually implementing innovation, creativity, digital technology integration and production management model. business, technical management, making an important contribution to the digital transformation roadmap of the Electricity industry in order to improve the quality of customer service, to meet the needs of socio-economic development of Hai Phong city.

Leaders of Binh Duong province cut the ribbon to inaugurate The Provincial Centralized Storage Center is a civil construction, grade II consisting of 9 floors and 1 rooftop, invested by the Provincial Construction Investment Project Management Board. The building has a total floor area of ​​12,311m2 and is equipped with technical systems including: Electrical and lighting systems; water supply and drainage system; security camera system, communication; automatic fire protection. In addition, the project is also invested with specialized equipment and synchronous office equipment, ensuring the preservation and storage of scientific and long-term documents, meeting the requirements of archival work. Quick and scientific document retrieval. The project has a total investment of 371 billion VND, started on December 30, 2019. After 16 months of construction, the project has completed the construction and installation in accordance with the design, ensuring quality, safety and progress. Binh Duong province storage center project Speaking at the ceremony, Mr. Mai Hung Dung said that the putting into use of this work has an important meaning, marking the progress in the province’s archival work which is increasingly safe, efficient, scientific and effective. shows the provincial leaders’ interest in the archival industry.

The remote operation success rate is over 99%. When an incident occurred, 81% of affected customers were immediately transferred and restored to power in less than 5 minutes (compared to 120 minutes of TCT’s regulation). The process of investment in development and modernization of the power system in Thu Duc City over the past years has shown that the reliability of power supply has improved significantly. Average number of outages per customer (SAIFI) is 1 time/year; the average outage time of a customer (SAIDI) is about 60 minutes/year – much lower than the 2015 index of 6 times/year and 700 minutes/year, respectively. With the motto “Electricity is one step ahead”, Ho Chi Minh City Electricity Corporation has a plan to prioritize investment in the development of the power system for Thu Duc City, focusing on developing smart grids in parallel with deploying other utilities. underground works. The goal is that by 2025, the electricity output supplied to the people of Thu Duc City will reach 5,500-6,500 kWh/person/year, the average number of power outages is less than 0.3 times/person/year and the average duration of power failure. less than 30 minutes/person/year. Mr. Pham Quoc Bao, Chairman of the Members’ Council of Ho Chi Minh City Electricity Corporation. In the period of 2021-2025, Ho Chi Minh City Electricity Corporation will invest about VND 3,200 billion to build a new 220 kV station and 6 110 kV stations (total added capacity is 1,382 MVA), develop 245 new stations km of medium voltage grid; 585 km of low voltage power grid, renovating and installing 447 distribution substations with a total capacity of 363 MVA in Thu Duc city. In this year, the corporation will complete Phuoc Long 110 kV station, start construction of new 110 kV Linh Dong station, 220/110 kV Thu Thiem station and 110 kV Thu Thiem station 1. In addition, the Ho Chi Minh City Electricity Corporation deployed 27 projects to undergroundize the power grid combined with information lines in Thu Duc city, in order to increase the undergroundization rate of the medium voltage grid from less than 50% at present to 75. -80% by 2025. With the motto “Customer is the center”, the electricity industry promotes digital transformation to improve the quality of electricity supply and customer service for the whole Ho Chi Minh City, including Thu Duc City. The focus is on promoting digital transformation in power system operation management and customer service provision in Ho Chi Minh City. The Corporation promotes the development of smart grids in Thu Duc city with the investment of a remote metering system, increasing automatic components on the power grid. Currently, the Corporation has basically completed the installation of distance meters in Thu Duc city. By the end of this year, 100% of medium voltage lines in Thu Duc city will operate fully automatically (DAS/DMS). In the period of 2021-2025, the corporation will continue to invest in strengthening remote control devices for medium voltage lines, along with solutions to close loops, and enhance the form of construction without power cut (live- line), in order to improve the flexibility of transmission, reduce the range and number of customers affected by power outages (if any). View of Thu Duc city. On the other hand, the corporation promotes the development of EVNHCMC Customer Care application (app) on the phone. The area of ​​Thu Duc district (old) has completed the installation of distance meters since 2020. Customers can monitor their daily electricity consumption through this application. All electrical services are provided online by the corporation. Customers do not have to go to the electricity headquarters to register, instead register for the service on the customer care website or via the app) EVNHCMC Customer Service of the corporation. In addition, TCT also promotes the application of 4.0 technology in surveying, designing and improving procedures to continue to improve the electricity access index, ensuring all investment projects through the medium voltage grid. 22 kV power supply for customers is carried out by the electricity industry within 5 days, contributing to attracting investment businesses in the city. “EVNHCMC prioritizes focusing resources, rapidly developing modern power systems in Thu Duc city, in order to ensure the power supply capacity to meet the city’s development needs, constantly improving the quality of electricity. electricity and customer service, contributing to building Thu Duc City into a new growth pole of Ho Chi Minh City, worthy of its potential and meeting the expectations of leaders and people”, Mr. Pham Quoc Bao positive.

The company has automated the voltage and frequency adjustment of the power system to ensure power quality; Reducing the amount of electricity that cannot be supplied to customers, creating more revenue for the electricity industry; Reduce long distance transmission and optimize transmission grid loss. Modernizing the development of electricity meters and remote metering data collection systems has helped to collect complete data on customers’ electricity usage, timely detect problems of the metering system. count. This technology also helps the Company closely monitor the electricity usage mode of customers, especially large customers, and at the same time serve to calculate the unit’s power loss accurately as well as the power loss of the station. public in particular. In addition, the Company also encourages customers to actively adjust or change electricity demand during peak hours. Thereby, reducing the maximum capacity of the power system, reducing the overload of the grid, contributing to improving the economic efficiency of the power system. At the same time, it will also create conditions for the community to be more aware of electricity saving and efficient use of electricity, contributing to the protection of national resources. Ba Ria – Vung Tau Power Company has implemented many measures to reduce power loss With the unremitting efforts of all employees Ba Ria-Vung Tau Power Company in the control of power loss in particular, the rate of power loss continuously decreased from 2015 to 3.97% at 22kV level; in 2019 is 1.75% (including 110kV level) and in 2020 is an impressive number: 1.57% (including 110kV level). With the mission “ Electricity is one step ahead ”, BRVT Power Company has actively invested and upgraded the power grid system, ensuring safe and reliable power supply for tourist centers such as Thuy Van beach (Vung Tau City), Long Hai beach. (Dat Do district), Ho Coc – Ho Tram resort (Xuyen Moc district)… Every year, the Company focuses its capital to invest in preventing overload and strengthening the power grid; Electric islands for industrial shrimp farming, irrigation pumping stations to fight against drought, concave areas without electricity, removing fishing tackle… to meet the demand for irrigation for agricultural production and aquaculture. fisheries and tourism development in the province. Doing a good job of reducing power loss makes a lot of sense. help reduce production costs, increase profits for the company and increase the efficiency of production and business of the unit.

The new factory demonstrates Spartronics’ s commitment to long-term investment in Vietnam. Photo: TL Spartronics LLC – a manufacturer of electronic and mechatronic complexes for civil aviation, defense, aerospace, control, life sciences and healthcare, just officially started construction. new machine in Binh Duong, Vietnam. This newest and most state-of-the-art factory will enhance its advanced electronics manufacturing and machining capabilities. Located in the vicinity of the city. Ho Chi Minh City, the new factory is expected to officially go into operation in March 2022. The new factory has an area of ​​27,000 m2 and is equipped with rooftop solar power system, has an area of ​​four times. The Company’s current factory is located near major airports and seaports. Located in Nam Tan Uyen Industrial Park, this factory will replace the company’s existing factory located in Binh Duong province. All ISO certifications and customer reviews and certifications will also be transferred to the new factory. Spartronics factory in Vietnam specializes in manufacturing electronic complex products, mechatronics for civil aviation, medical equipment, measuring and control equipment in industrial environments that require precision. high body. The entire value chain is located in Vietnam, including the provision of engineering services, sample production, manufacturing, supply chain management and after-sales service. “For our company, Vietnam occupies an important position, not only because of the rapid development in the region but also a key position in the development strategy of the Group. The new factory demonstrates a commitment to long-term investment in Vietnam, helping to maintain customers’ high expectations for product and service quality and contribute to driving growth along with customer growth ”, said Paul Fraipont – President and CEO of Spartronics Group.

Professional solar battery cleaning worker for a project in the city. Ho Chi Minh Meanwhile, according to engineer Thanh, the current method of cleaning the panels is mostly done by investors, most of them are using water, available facilities and using a hose to wash them, this method is not technically correct. in terms of maintenance, because many areas have water contaminated with alum, hard water, there is a lot of organic matter, more dissolved metals… leading to further damage to the panels. “The effectiveness of the project apart from equipment, materials, installation techniques, the operation and maintaining the efficiency of the system is related to the cleaning of the panels. Keeping the panels clean is the key to maximizing output, increasing economic efficiency for investors, ”Thanh said. Solar power is booming in Vietnam, especially household investment packages, concentrated in remote and island areas in the South. According to the Vietnam Electricity (EVN), by the end of 2020, the total capacity of renewable energy sources will be 17,430 MW (up 11,780 MW compared to 2019) and accounting for 25.3%. . In which, there are about 8,000 MW of rooftop solar power and more than 8,400 MW of large farm solar power. Thus, according to investors’ calculations, the whole country currently has no less than 30 million solar panels operating in the whole system and will increase when many projects are under construction and about to be operational. Seeing this potential, a number of businesses in the South have added new services, which are professional cleaning of solar panels and package maintenance for solar power systems. the investors. Mr. Le Tran Khanh Vy – General Director of Nhat Hung Environmental Technology Co., Ltd. (Thu Duc City) – said that in the face of more and more investors installing solar equipment, the company opened more professional solar battery cleaning service, currently hundreds of customers across the country have signed contracts to participate in cleaning and maintaining solar power systems with this package. To meet the needs of customers, especially solar power investment packages in industrial form, the company is forced to professionalize by producing standard cleaning solutions, investing in specialized cleaning equipment. and has a team of professional staff in charge. “The solution that the company offers is to keep batteries clean by cleaning them regularly and properly; Check the water source, if the water source is contaminated with alum, hard water, contains a lot of organic matter, lots of dissolved metals, it must be handled; choosing a cleaning solution specialized for cleaning panels, because now there are domestically produced products with appropriate and safe prices, ”said Mr. Vy. On the market, there are specialized solutions for cleaning solar cells According to electricity experts, at present, many solar power projects are invested billions of dong, even more money, but the stage of battery cleaning and system maintenance is less concerned by investors properly. This leads to a reduced lifespan of the building, especially the heat collection efficiency of the panels is low, while if cleaned and maintained properly, the economic efficiency is not small. Mr. Huynh Duc Tien, living in Hoc Mon district, city. Ho Chi Minh has just signed a package contract with a company specializing in solar battery cleaning and maintenance of the solar power system with an investment of more than 1.2 billion VND nearly 2 years ago. Mr. Tien said that the cleaning company has specialized solutions, tools and techniques, so it is handed over to them for management because the cost is not much and it saves time.

The 110 kV side uses the diagram of two busbar systems with a ring busbar with 21 compartments, in this stage, installing equipment for 13 lanes. Thuy Nguyen 220 kV substation has an area of ​​about 40,100 m2 located in the area of ​​2 communes Dong Son and Kenh Giang, Thuy Nguyen district, city. Hai Phong. This is a class I energy project of group B, with a total investment of more than 348 billion dong, invested by EVNNPT, the project is managed by NPMB, and operated by Power Transmission Company 1. Thuy Nguyen 220 kV substation is the first substation in Vietnam. Photo: VGP According to Mr. Luu Viet Tien, Deputy General Director of EVNNPT, Thuy Nguyen 220 kV substation has the advantages of reducing about 80% of the copper cable; reduce transportation, construction and installation of copper cables and reduce the area of ​​cable ditch; reduce the installation space of control and protection devices. Mr. Tien also added that digital TBA is not only a new technology to Vietnam but also to advanced countries. Before implementing the project, EVNNPT held many seminars with major equipment manufacturers in the world such as Siemens, ABB, GE … however the number of 220 kV substations was similar in scale to the 220 kV Thuy Nguyen substations used for Current digital TBA technology is very few. The power supply and operation of the 220 kV Thuy Nguyen substation will ensure the power supply for the load and meet the socio-economic development needs of Thuy Nguyen district, city. Hai Phong and its surrounding areas, reduce power loss and strengthen connectivity, safety, stability and flexibility in power system operation. At the same time, in the process of investing and operating the 220 kV Thuy Nguyen substation, EVNNPT will summarize and evaluate the advantages, disadvantages, benefits, costs and investment efficiency of digital substations to serve as a basis for decision. select control technology, protect TBA in the future.

Solar power is being encouraged to use, contributing to creating more clean energy sources, towards the goal of green and sustainable electricity development. Immediately after the Politburo issued Resolution 55-NQ / TW, on February 11, 2020 on the national energy development strategic orientation, the provincial People’s Committee directed the Department of Industry and Trade to coordinate with related agencies and units. research, advise and propose rooftop power development. Department of Industry and Trade proposed the Ministry of Industry and Trade to supplement the planning for 2 solar power plants in Viet Yen and Yen The; solar power projects in industrial zones and clusters with a total capacity of 2,320 MVA. Households in Luc Ngan district install solar power system on the roof. Photo provided by CTV. Mr. Nguyen Duc Hoan, Deputy Director of the Department of Industry and Trade, informed that although power companies stopped connecting and purchased solar power in the case of installation after December 31, 2020, it is only temporary. In general, the State has a mechanism to develop solar power with many attractive policies such as: Buying solar power at high prices, purchasing time lasts 20 years, commercial banks facilitate maximum loans from 70 -80% value of solar power projects in a period of 5-8 years. With the above advantages, many individuals, businesses (DN) and units have been encouraged to take advantage of this energy source. By the end of December 31, 2020, the whole province had 607 customers installing rooftop solar power system with a total installed capacity of 15,936.46 kWp. In which, 10 are enterprises with a total installed capacity of more than 100 kWp or more, the rest are households and non-business units. It is known that since 2017, the province has implemented rooftop solar power development programs in a number of different forms, but mainly supported the installation of pilot models, demonstrations for the purpose of evaluation and replication. power saving; At the same time, it will support 10 state agencies to participate in the use of solar power in the near future. At this time, the Department is assigning the Center for Industrial Promotion and Trade Promotion to assist the People’s Committee of Luc Ngan district to install solar bulbs in the district People’s Committee square. The results and orientations of the province show that the development of solar power in the locality is increasing in both quantity and scale, especially in enterprises. This policy, in the immediate future, has brought about a clear effect, contributing to reducing the pressure, saving costs of developing transmission lines and using clean energy sources. Solve the expired solar battery problem The electricity obtained from the sun is clean energy, but when the solar panels expire, they become garbage, which is very dangerous. According to specialized agencies, the average service life of solar panels ranges from 10 to 20 years, depending on the location and the environment where it is installed. However, the handling of expired panels so far has not had a specific direction. A representative of the leadership of the Department of Industry and Trade – a permanent unit to advise on this content, said that in a written consultation with the Provincial People’s Committee on the development of rooftop power projects, the unit has not yet proposed specific measures for Dispose of the panels when the battery expires. By the end of December 31, 2020, the whole province had 607 customers installing rooftop solar power system, total installed capacity was 15,936.46 kWp. In which, 10 enterprises with a total installed capacity of more than 100 kWp or more, the rest are households and non-business units “. Mr. Nguyen Duc Hoan, Deputy Director of Department of Industry and Trade Discussing this issue with Mr. Nguyen Ba Trinh, an expert from the Department of Environmental Protection (Department of Natural Resources and Environment), it is known that the solar cell when its expiry date is hazardous waste. The disposal of this waste is very difficult, if not handled properly but burying in the wrong regulations, it will pollute the soil and water environment due to generation of heavy metals or toxic emissions. In the event of a fire the battery is capable of harming human health. There is only one unit in the province, Hoa Binh Industrial Waste Treatment and Recycling Joint Stock Company (Yen Dung) that is eligible to handle this type of waste, but the scale of treatment of the enterprise is small. Mr. Trinh also added that, according to Article 68 of the Law on Environmental Protection, the environmental protection responsibilities of owners of production, business and service establishments must “collect, classify, store, treat and dispose of. disposal of solid waste in accordance with the law ”, that is, the investor is responsible for handling the battery when it expires. Therefore, it may be worrisome that, after the expiration of its use term, households dispose of solar panels with domestic waste, do not hire the unit to collect, transport and dispose of it. Unattended authorities. Or the owner of the panel is not able to handle or dispose of the panel into the environment. Thus, solar power development associated with environmental sustainability has not been paid attention. New authorities focus on planning and encouraging expansion to reduce pressure on the national grid without giving specific solutions to handle solar cells when they expire. Some comments said that the functional agencies, especially the Department of Industry and Trade, the standing unit to advise on this content, should soon offer solutions to handle solar batteries after the expiration of use. Hoang Phuong

Minh Hoa Electricity Worker constructs and renovates the medium voltage grid. Mr. Nguyen Hoang, Minh Hoa Electricity Director, said that in 2020, Minh Hoa Electricity is one of the units in charge of the construction of many works under the major repair and construction investment source of Quang Binh Power Company. including the work of overhaul of the Minh Hoa medium voltage electrical network in 2020, the work to improve the reliability of electricity supply in Quang Binh province by 2020; works to reduce power loss of medium voltage electrical network in Quang Binh province by 2020. All works are constructed with the highest sense of responsibility, ensure on schedule, complete and put into use, making an important contribution to recovering operating capacity, saving investment capital and supplying electricity safely and continuously, improving the reliability of power supply in the area. Minh Hoa Electricity currently manages an intermediate transformer station (TBA) with a capacity of 8,000kVA; 18.36km of 35kV line; 189,97 kilometers of the 22 kV transmission line, and 153 TBA with the capacity of 21,027kVA. In order to ensure the safe operation of the power grid, and at the same time supply enough electricity to meet the growing demand in the area, Minh Hoa Electricity has strengthened the on-duty force at the line management team and the substation; consolidate and well organize the information receiving and processing system to promptly handle incidents and improve customer care services; Regularly deploying the inspection of the grid with the temperature camera, promptly preventing and detecting a number of locations at risk. Up to now, Minh Hoa Electricity has the ability to remotely control 14/14 recloser of various types on the grid; at the same time, deploying the outgoing phase isotope 481 substation 110kV Tuyen Hoa with the busbar C41 Quy Dat intermediate substation to ensure the safe and continuous power supply when the incident occurs. Currently, the unit has been focusing on implementing the closed circuit of Vè-Si to ensure more optimal power supply in the coming time. Along with that, thanks to the foreign capital funding to supply electricity to the villages and hamlets that do not have electricity, so far most of the poor and difficult border communes, such as Thuong Hoa and Dan Hoa have been “covered”. national grid. With efforts to invest in the development of power sources and grids aiming to improve the quality of electricity services, Minh Hoa Electricity always ensures to meet the needs of electricity loads for the people as well as effectively implement the generation target. socio-economic development, ensuring national defense and security in the area. According to Mr. Nguyen Hoang, in the coming years, the demand for electricity of customers will increase, inevitably will create supply pressure on the grid power generation and management unit, requiring management. , forecasts of load demand must be detailed and close. Therefore, Minh Hoa Electricity determined that the concentration of management, operation, investment in construction and repair of the power system must be implemented according to a long-term and regular plan to increase supply reliability and quality. Electrical Power. “The goal of Minh Hoa Electricity is to strive to achieve an annual average commercial electricity growth rate of over 10% by 2022; the rate used to transmit and distribute electricity reached the plan assigned by Quang Binh Power Company; Average electricity price is 1,895 VND / kWh; electricity bill collection coefficient> 100% … Therefore, each employee of the whole Electricity must have the highest solidarity, unanimity, striving to comprehensively complete political tasks and economic and technical targets. art, steadfastly accompany the constant growth of heroic Minh Hoa homeland in the process of industrialization and modernization ”-ong Nguyen Hoang shared more.

Inauguration of a model combining agricultural production and solar power. The model will be deployed from May 2020, completed and connected to the grid in December 2020, exploiting electricity from the beginning of 2021. Solar power system with a capacity of 45kwp, installed on an area of ​​400m2, Below is a plant membrane house. Photovoltaic panels are designed with suitable spacing, ensuring the growth of plants. On average, the system produces 103kwh of electricity per day. From January to March 2021, the project has sold more than 4,471kwh of electricity, equivalent to more than VND 22 million. Underneath the panel system, farmers experimentally planted cucumbers. Cucumbers grown in the model had a higher fruiting rate than the outside control field. The fruits were long, beautiful, and the average fruit was harvested more than 30kg per day. Mr. Truong Kien Tho, Deputy Director of the Department of Agriculture and Rural Development of An Giang province, said that this is the first model of combining agriculture – solar power with a tripartite cooperation between people, businesses and teams. non-profit organizations are conducted in An Giang. The model helps farmers have dual income sources, increases production efficiency in a sustainable direction. The positive test results have proved the suitability and feasibility for replication. Farmers grow cucumbers in a net house, with solar panels above. Delegates visit the model.

Ms. Tran Vu Diem Hang, Green Development Innovation Center, said that the rooftop solar power system is a solar power system with photovoltaic panels installed on the roof of a building, with capacity? exceeding 1 MW, directly or indirectly connected to the electricity grid with a voltage of 35 kV or less of the buyer. Every region in our country has potential for solar power. For example, in Hanoi, the radiation intensity and total radiation are not small, the installation of grid-connected solar power brings high efficiency. The Northwest region also has solar energy potential … So, no matter where you live, people can install rooftop solar PV. For households, rooftop solar power saves electricity costs, reduces the pressure of paying high-tier electricity bills for households using a lot of electricity; increase household income because it is possible to sell excess electricity after it is used to EVN; help protect the roof to cool the roof, especially in the summer … A rooftop solar PV system consists of photovoltaic panels, power converters (inverters) and wires as well as a lightning protection system. Currently, the cost of installing a rooftop solar power system is not too expensive: the current investment price of 01 kWp ranges from 13-18 million VND depending on the size and origin of the equipment. However, in order to install solar power on the roof, people must pay attention to a number of points. First, the area must be large enough for installation. Accordingly, the roof area must be at least 6 – 7 m2 / kWp and 3 kWp should have a roof area of ​​21 square meters. You also need to make sure the roof is sturdy enough to place the mechanical system, the battery plate on top. In addition, the installation space must be ensured that there is no shade obscured by trees or other construction works. In particular, you must test the construction unit’s capabilities. Currently, each unit has its own capabilities, experience and standards leading to very different quality and price. Therefore, people should choose units with good capacity and years of experience. Invite readers to watch the video: Spontaneous gas sales are rampant. Source: VTV24