Energy storage systems, such as flow batteries, are essential for integrating variable renewable energy sources into the electricity grid. While a primary goal of increased renewable energy use on the grid is to mit. ••Environmental impact assessment of flow battery production was c. Reducing dependency on fossil fuels by introducing renewable energy such as wind and solar is fundamental to achieving climate mitigation goals (Chu and Majumdar, 2012;. The goal of this study is to understand the environmental impact associated with the production of flow batteries. We have systematically evaluated three different state-of-the-art fl. With the battery technology and assessment framework specified, we begin with a baseline environmental impact assessment of flow battery production using the original data. The investigation into the production of three flow batteries provides important guidance on potential environmental impact associated with battery component manufacturing, u.