The Tắt Ngoẵng hydroelectric power plant is located on the Sập stream in Chiềng Hắc commune, Mộc Châu district, Sơn La province. It has a capacity of 7 MW and a total investment of 147 billion VND.
The Tat Ngoang hydroelectric power plant, owned by Song Da Investment and Construction Joint Stock Company, consists of two generating units and is responsible for supplying electricity to the 110KV grid of Son La province, part of the national power system, via the 110KV line at route 171-E17.1. The average annual electricity output supplied to the national grid is Eo = 21.22 x 10⁶ kWh.

Perspective view of the Tat Nang hydroelectric power plant.
In line with the State's policy of localizing products, combating import surpluses from other countries, and promoting the "Vietnamese people use Vietnamese goods" campaign, our company team has continuously strived to cooperate with domestic units to organize, assemble, and synchronize equipment for the factory, achieving a localization rate of over 70%, meeting the standards for the electrical industry.
With that practicality in mind, on June 6, 2011, the investor signed an economic contract with a domestic equipment supplier, Viet A Au Power Plant Equipment Joint Stock Company. The plant's technological equipment has a localization rate of over 70%, and the software was developed by our company's experts, allowing for proactive adjustments, repairs, and replacements.
This arrangement saved the investor a significant amount of money, while the contractor assumed responsibility for technical support, operational training, and long-term warranty and repair services.