This paper uses register data and open vacancy data to determine if green industries require different skills than other employers. This is done by focusing on how the entry of the battery producer Northvolt changed the labour demand when establishing in Skellefteå (Sweden). Using data on all vacancies in Sweden 2016–2023 we analyse the skill- and knowledge demand in Northvolt's job ads and compare that to the labour demand at the local, regional and national level. In terms of occupations, we find only minor tendencies towards a higher demand of higher-skilled jobs compared to incumbent local employers, but an increase of service work and a reinforcement of the local manual work specialization. Using language models, we combine the vacancies with a scheme of skills and knowledge from the ESCO-taxonomy. Interestingly, Northvolt deviates in both the skill- and knowledge requirements compared to similar jobs in the rest of the country. This especially concerns a greater emphasis on information, collaboration and communication skills in contrast to other employers who stress manufacturing experience. Despite these skill-specific differences, our experimental approach finds little evidence that the entry spurred a significant diversification and upgrading of the regional labour market.