Our client, a global energy major was interested in understanding the most promising early stage developments in the area of residential battery storage. To enable prioritisation of the most relevant research directions, we developed a taxonomy of battery technologies and an overview of research families. In close collaboration with the client, we developed a set of criteria to identify research groups of particular interest. In a second phase of the study we also summarized innovative concepts in battery manufacturing techniques and battery management systems. The results of the study have directed the client’s technology scouting activities.