In Vietnam, the development of solar power including solar power systems on the roof of houses is considered to have a lot of potential. Specifically, the annual radiation measured in the Southern region and South Central provinces is approximately 1,600 kWh/m2. According to a report on the technical assessment of the potential of rooftop solar energy in Vietnam released by the World Bank in 2017, the potential of solar energy in Ho Chi Minh City is about 6,300 MW. Meanwhile, Hanoi has average monthly sunshine hours of about 1,466.1 hours per year, which is listed in the areas of average solar radiation of 3.3 to 4.1 kWh/m2 per day. According to the Ministry of Natural Resources and Environment, the generation of every 1 kWh of solar energy will help to reduce CO2 emissions by 0.6612 kg. If solar energy is promoted, it would be a clean energy resource with rather high output, while helping to minimise the budget invested in electricity generation and transmission facilities. In many countries, solar energy is also a developed industry, creating jobs and income for many people. It is estimated that if only two million rooftops in Vietnam were installed with solar panels with a capacity of 10 kW per roof it would reduce the corresponding amount of 16 million tonnes of coal per year used for coal fired power plants.