Energy communities are emerging around Europe with a vision to transition the traditional centralised energy system to one where individual households can collaborate to become energy producers. Although the vision of energy communities is still in a formative stage, it seems members of such organisations will need digital technology to manage and organise renewable energy together. The design of eco-feedback designs appears as a digital means to create awareness of this need. Yet, until recently, eco-feedback has been designed to target the individual householder. The research presented in this paper aims to identify design characteristics of ecofeedback systems aimed at collaborative energy communities. We explore two different concept designs that are evaluated in a focus group session with prospective energy community members to establish design characteristics. The findings show that participants not only identified characteristics related to different eco-feedback design characters but also identified a set of properties related to the collaborative and social nature of the community. CCS CONCEPTS• Human-centered computing → Collaborative interaction.