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