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Vietnam's rapid expansion of solar power has led officials to overhaul how elect
Vietnam's rapid expansion of solar power has led officials to overhaul how electricity is priced across the day. Under rules that took effect this year, the peak-pricing window — the period when electricity costs most — has been consolidated into a single evening block running roughly from late afternoon through late evening, replacing a previous system that spread premium hours across both daytime and evening periods. Industry and official sources attribute the change to solar generation having grown large enough to ease daytime supply pressure, shifting the grid's most strained period to the hours after sunset when panels stop producing. The reform creates different incentives for different users: storage operators and some power plants benefit from concentrated peak pricing, while businesses with heavy evening electricity needs face higher bills. Other countries in the region working through their own renewable transitions are watching Vietnam's experience with interest. How should a government balance the competing interests of solar producers, businesses and ordinary households when redesigning electricity prices?