Solar energy is favored geographical location, intensity of solar radiation is relatively high. The number of sunshine hours averaging about 2000 - 2500 hours / year, the total energy of solar radiation averages about 150kCal / cm2. Potential theory experts evaluated approximately 43.9 billion TOE / year. In particular, not to mention most of the cities like Ho Chi Minh, the North West (Lai Chau, Son La, ...) and the North Central region (Thanh Hoa, Nghe An, Ha Tinh) ...
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