Battery storage to cut power beaks in the foundry process The case study has investigated whether a battery storage facility can be economically viable to cut power peaks at foundries. In the study, a model has been developed to be able to calculate the benefit of a battery storage regardless of electricity price area and electricity tariffs. The results show that for 2021 electricity prices, it was not profitable (based on a straight payback period) to only cut power peaks and use electricity price arbitrage with batteries. In order to achieve profitability, some form of electricity network service is required, such as the ancillary services market. The value of participating in the ancillary services market is not included in the analysis as this was a new and uncertain area when the modelling was performed. In addition, the compensation for support services is currently volatile and the duration of the level of compensation is unclear.