The new law requires the installation of solar panels in all *public* parking lots operated by the government. I checked this through local news sources.
In South Korea, there are already incentives to install solar panels on buildings, including parking lots. If you operate a solar power system with a capacity of over 20 kW, you can sell the generated electricity at prices higher than the market rate thanks to government support programs.
Despite these benefits, many parking lots in South Korea still do not install solar panels. This is mainly because, given the country’s high population density, most parking lots are located on land that is considered potential development sites. Once solar panels are installed, it becomes more difficult to change the land use later for development purposes, and the owners would also have to bear additional costs for removing the panels.