Community networking is an emerging model of a shared communication infrastructure in which communities of citizens build and own open networks. Community networks offer successfully IP-based networking to the user. In addition, some hosts are connected to the network nodes in order to provide network management and end user services. Recently, clouds have been proposed for community networks. Some papers such as community have started deploying computational infrastructure to enable cloud computing within community networks. In this paper, the authors propose different options for such community clouds to contribute to energy efficient systems, in particular regarding cloud-based services and in relation to smart grid.