Experts discuss obstacles for rooftop solar power stockbot 0 321 2021.09.01 17:51 http://vietnamnews.vn/economy/1022957/experts-discuss-obstacles-for-ro… + 16 https://vietnamnews.vn/rss/economy.rss + 8 Solar experts have raised difficulties and problems in policies and procedures for investment, installation and operation of solar power systems in Việt Nam at a seminar.