Switching over from fossil fuel, burning of which is threatening to increase global warming and global temperature, is mandatory at this hour to save the planet from adverse consequences of global warming. On the other hand, a cost-effective method for such transition has to be proposed with effective utilization of available renewable energy without burdening the end user. Besides its cost beneficiaries, RE resources will not run out over time, easy maintenance and reduces any environmental and health impacts. The following paper discusses the available Renewable energy resources (RE) in Sri Lanka and the strategies that can be adapted to attain the goal of 100% energy production in Sri Lanka by 2050 using the RE as set by the National Energy Policy and Strategies of Sri Lanka (NEPS). The paper also discusses the possible challenges that may arise while implementing the RE power system and strategies to overcome such challenges. The power demand required by the Sri Lanka consumer and industrial market in 2050 is estimated as 34 000 MW, of which nearly 44 % is expected to be supplied by the wind-powered generators and 47 % by solar energy and the rest of the demand is expected to be met by biogas energy and hydro-powered generators.