As the energy transition accelerates, growing demands are being placed on the electricity grid in terms of capacity, stability, and operational flexibility. Battery energy storage systems have emerged as a potential means of addressing these challenges by mitigating peak loads, supporting the provision of ancillary services, and enabling the integration of variable renewable energy sources. This study explores the socio-economic potential of Battery energy storage systems in the Swedish region of Halland, with a focus on the local perspective of distribution system operators. The research is based on qualitative methods, including a review of relevant literature and ten interviews with stakeholders in the regional electricity and energy sector, primarily local grid companies.The results highlight grid capacity as a major constraint on further electrification, particularly in the regional grid infrastructure in southern Halland. While several respondents recognise the potential of batteries to relieve pressure during peak demand, current deployments are often designed to serve national markets for ancillary services rather than to benefit the local grid. This mismatch can create operational challenges, especially as distribution system operators currently lack control over battery dispatch.The study finds that the effectiveness of battery storage depends heavily on location, control mechanisms, and business models. A recurring issue is the tension between national system-level objectives and local capacity needs. Existing regulations, such as mandatory connection obligations and the lack of targeted incentives for local flexibility, hinder investments that could strengthen the regional grid. Nonetheless, many respondents acknowledge that Battery energy storage systems may become more valuable in the future, provided that market structures and regulatory frameworks evolve to support locally beneficial applications.