Refdinal Nazir is received the B.E. an the M. Tech degree in Electrical Engineering from Bandung Institute of Technology (ITB), Bandung, Indonesia, in 1985 and 1991. He has received Ph.D. degree from University Technology of Malaysia (UTM), Johor Bahru, Malaysia, in 1999. He has some experiences in resolving modeling and planning of energy using LEAP, HOMER, Ret Screen software. he has published a number of papers in various national & international conferences & done a number of in-house & industry projects. His area of interests are electric machine, electric power and energy, renewable energy sources, microgrid, energy conservation, energy efficiently.