State of the art LCA guidelines were applied to identify comparable system boundaries (ILCD, 2010). Both inventories were based on the manufacturing process of the currently manufactured capacitor (personal communication with Alstom Grid), but the inventory was modified to represent the effects of including nanomaterials. Based on experimental prototypes, a nano-composite filler with 4.5% silicate nanoparticles embedded in polypropylene was chosen for analysis (Tanaka et al., 2004). This material has improved dielectric breakdown voltages, allowing smaller