Scorching weather, rooftop solar power promoting benefits

Scorching weather caused a sudden increase in electricity demand of households. Right at this moment that the rooftop solar system more effectively bring into play for cooling and significantly reducing the monthly electricity bill.

Reducing power consumption at the high price ladder

After having completed installation and commissioning of the Rooftop solar power (RSP) system in May 2019, and after more than 1 year of use, Nguyen Thuong Ly's family (Phong Bac street 14, Cam Le district, Da Nang city) felt very satisfied with the benefits from rooftop solar: Improvement in living space, coolness, great economic efficiency, reduction in monthly electricity costs by about 70% compared to that previously.

Specifically, when there was no RSP system, Mr. Ly’s 5-member family had to pay about VND 1.3 - 1.5 million for electricity. Since his self-generation of power, his family only needs to buy more from Vietnam Electricity more than 200kWh/month, so that they no longer have to pay for electricity at high price ladders. The monthly expense for electricity is only about VND 400,000. According to calculation data, with such practical efficiency, after only about 5-6 years, he will recover the capital invested in the system.

Feeling satisfied with the benefits for nation and family obviously seen from the RSP system, Mr. Ly has proactively consulted, invited his neighbours and relatives to install the RSP system. His family also plans to research and install an additional system on the vacant position of the roof to fully exploit the potential and benefits of this renewable power source..

RSP system of Nguyen Thuong Ly's family

For customers who are using power not for daily activities, the installation of rooftop solar system will significantly reduce the monthly electricity bill. Specifically, during peak hours, customers who are buying commercial electricity (voltage below 6kV) will have to pay VND4,587/kWh; and the price for produced power is VND 3,076/kWh (excluding VAT). If customers use rooftop solar power, they will reduce this output at high price during the morning peak hours (9:30 - 11:30). Therefore, it will reduce costs and increase production and business efficiency for businesses.

EVN creates most favourable conditions for RSP development

The selection of investment for capacity of solar power systems depends on the needs of each household and enterprise. The investment rate is about 20 million - 25 million/kWp with equipment imported from well-known and reputable brands in the world. In addition, some contractors also offer lower prices, diversifying options for people. Customers will be assisted by Vietnam Electricity for free installation of 2-way meters; mechanism of electricity buying and selling by the separate direction of delivery and receiving if the solar cell system meets the standards and conditions required for connecting the existing power grid.

As of early June 2020, there have been more than 31,100 RSP systems across the country, with a total installed capacity of more than 640MWp, a net output of more than 145 million kWh, the total cost amount of power paid to customers by EVN is more than VND 300 billion.

The development criteria of RSP are mainly encouraged by the direction that customers are self-consuming, creating local power supply, contributing to ensuring power supply when Vietnam’s electricity system has no backup source.

EVN General Director Tran Dinh Nhan affirmed that the Group would create the most favourable conditions and support for the RSP development, bringing efficiency to investors, and being suitable for the absorption and release capacity of the grid.

In the coming time, EVN will study and publish information on the capacity to absorb RSP sources in areas for investors to consider choosing the appropriate scale and location of investment in the system; At the same time, giving guidance on technical standards to assist people in selecting appropriate technology.

Refer to information about solar roof at website:


  • 25/06/2020 04:10