SCCER Storage aims to develop the science and technology of electricity & heat storage in order to guarantee the continuous (temporal and regional), reliable, and cost-efficient supply of power, heat, and fuels derived from intermittent renewable energies. The Technology Assessment group is involved in Work Package 5 on “Technology Interaction of Storage Systems”. Within the task “Integrated assessment of storage technologies”, the TA team will perform a comprehensive sustainability assessment. It is based on the three traditional areas of sustainability assessment with a focus on cost and environmental indicators. The system level analysis will be conducted at the level of individual technologies and/or clusters of technologies and at the national scale for Switzerland.