Energy efficiency in routing protocols has been major design goal for Mobile Ad Hoc Networks (MANETs) as the hosts are energy constrained. In this paper, proposed protocol, Energy Efficient Grid Routing Protocol (EEGRP) exhibits amalgamation of caching technique and grid architecture to achieve energy efficiency in MANETs with restricted mobility. In each grid, header nodes are created and employed for route discovery and maintenance. The Header Selection Algorithm and Header Transition Algorithm equipped with caching technique have been proposed to minimize energy consumption mainly during header registration and transition. The simulation results show that EEGRP achieves higher host survival ratio and less energy consumption in comparison with existing grid based routing protocols. Also, with higher node density EEGRP performs even better.