Three Ha Tinh factories are taking power from up to 22 MWp of roof solar and a 45 MWh battery - the cost line is nearly 3.5 billion dong a year, and the tariff is blank
VietNamNet reported on 28 October 2026 that VinEnergo has switched on rooftop solar and a battery at the Vung Ang economic zone in Ha Tinh. The solar line is up to 22 MWp. The battery is 45 MWh. The article names the VinFast plant's owner, the VinES battery plant's owner, and a V-G battery joint venture as the customers. It calls this VinEnergo's first project under a direct power purchase mechanism. An estimate on the page is about 39 million kWh in the first year and nearly 3.5 billion dong of cost a year. No dong per kilowatt-hour and no contract length are printed. The battery's megawatts are not printed.