Mobile Ad Hoc networks are being increasingly used in wireless communication with many technological enhancements. One of the major issues in such an infrastructure less network is the delivery of the data packets in an energy efficient manner, taking into account the highly dynamic topology of the network. Many of the existing protocols are susceptible to node mobility and one of the major design issues in such networks is the energy efficiency of the resource constrained network. An energy Efficient Routing protocol is proposed in this paper, with the major objective of minimizing the energy consumption of the route. The intermediate nodes act as a forwarding candidate, when they are capable of relaying the packet with the least energy consumption. A sleep/power down approach is also implemented, with an objective of reducing the inactive energy consumption of the nodes not involved in active relaying. Using simulation, the proposed methodology is compared with one of the most dominant routing protocols in wireless networks and is found to achieve better energy efficiency and improved network capacity by using power control in a highly dynamic network.