Experts believe with the rapid growth rate in production and business activities, the supply of electricity to businesses will remain challenging if Vietnam does not take advantage of renewable energy. In particular, using green energy from rooftop solar power systems is an indispensable choice for businesses. According to insiders, both Decision No. 13 by the Prime Minister in 2020 and Circular No. 18 by the Politburo the same year allow rooftop solar power systems to be installed at construction sites, and the purchase price and power purchase contract can be negotiated by the buyer and seller. However, the scale of rooftop solar power is limited to 1 MW or 1.25 MWp, so the full potential of the system cannot be exploited, experts said. Experts hold that authorised agencies should issue policies to clearly explain regulations in developing rooftop solar power, clarifying implementation for businesses./.