In wireless ad-hoc network energy of node is very important issue. Less amount of energy is directly affect the lifetime of network because all nodes in networks are battery operated devices. So optimization of energy consumption in network has greater impact on network life. The power consumption can be reduced at node level, transmission and receiving level. This paper is focusing on how various propagation models affect the energy consumption in ad-hoc network with MANET routing protocols. The four widely used Ad-hoc routing protocols compared are: Ad-hoc on demand Distance Vector (AODV), Destination Sequenced Distance Vector (DSDV), Dynamic Source Routing (DSR), and Ad-hoc on demand Multipath Distance Vector (AOMDV). Simulation has been carried out using Network Simulator 2.34 and its associated tools like Network Animator.