Vietnam is considered a nation with high solar potential, especially in the central and southern parts of the country. Solar energy intensity on the average is 5 kWh/m2. The intensity is lower in the North at about 4kWh/m2 due to the annual winter-spring cloudy and drizzle sky (To Quoc Tru, 2010). The average sunshine at 150kcal/m2 in Vietnam is between […]