Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis. It is an important source of renewable energy and its technologies are broadly characterized as either passive solar or active solar depending on how they capture and distribute solar energy or convert it into solar power. The large magnitude of solar energy available makes it a highly appealing source of electricity. The Assam Energy Development Agency (AEDA) under Science & Technology Department have taken up the initiative of harnessing and utilizing Solar Energy in Assam