About AST Grid-Tie Solar Inverter (GTSIA)

VIET LINH MANUFACTURING AND TRADING ELECTRIC-ELECTRONIC LIMITED COMPANY 83/ 24 Bach Dang Str., Ward 2, Tan Binh Dist., HCM City, Vietnam Tel : 08.8955.408, 8486.750, 8486698 - Fax : 08.8941.670 Website : www.ast-vn.com, E-mail : vietlinh@ast-vn.com About AST Grid-Tie Solar Inverter (GTSIA) This is an electronic equipment which is designed and manufactured entirely in Viet Linh Manufacturring and Trading Electric-Electronic Co., ltd with switching technology and advanced microprocessors. Along with the Solar panels, GTSIA device becomes the most modern PV system to transform solar energy (or wind energy) to AC power (220V-50Hz) directly to the national grid. This is an outstanding achievement of our AST company in recent years. Open up access to use of new renewable energy in our country to a new level. It can compare with the development and use of renewable energy rushing around the world today. The system includes: Solar panels, GTSIA, grid and load are used (See picture)

Description of activities - When there is no sunlight: (At night or when cloud cover) The solar panels can’t produce electricity so load will use electricity from the grid normally. At this time, the index of W0 will fully indicate the consumption power of the load that you are using.(W2) W2 = W0 - When there is the sunlight: The solar panels will produce electricity and GTSIA automatically transform DC power from solar panels into AC power with frequency, phase and voltage are identical to the grid. Power from solar will be mixed with the grid via W1. As the result of this time is that the index of buying electricity from grid(W0) will be offset of consumption of load(W2) with power from solar system (W1). W0 = W2 - W1 Thus, in the case of the load capacity is less than the capacity of solar power out W2