Energy is a valuable resource, a necessity, a commodity and a basic right, to all citizens. In spite ofits value, it is always on short supply, as there is a rise in demand alongside a shortage or depletion of certainenergy sources, such as fossil fuels. This has now led to the movement of many energy makers and citizens tostart using renewable sources, such as solar, wind and geothermal energy. The ultimate end goal is one ofcomplete transition to renewable energy sources. Tamil Nadu has already achieved an impressive 50%transition to renewable energy sources, but still heavily relies on coal and other fossil fuels for the remaining50%. The present average demand of power in the state, as stated by the Environmental Information,Awareness, Capacity Building and Livelihood Programme (EIACP) PC Hub, is around 14,500 MW to 15,500MW. The state operates the most diversified electricity generation portfolio in India, with an installed capacityof 31,894 MW which includes 50% of renewable energy, 28% from coal-based power plants including sharesfrom central generating stations, 5% from nuclear power plants, 3% from gas power plants and 14% throughOpen Access and Captive Power Plants (CPP). This paper will study costs and trend analysis for different fuelusage, the ideal application of phase-by-phase transition of different regions to renewable energy sources thatare most ideally suited based on climate and region, improvements and barriers in policies that may hinder orboost development, smooth transition of petrol bunks to electric, and strategies for environmental impactmitigation during transition, so as to ensure that the risk-reward ratio is more desirable and beneficial for thestate.