In this article, we contribute to the legal scholarship on the interaction between EU data governance and electricity legislation, analysing the impact the Data Act could have on the sharing of metering and consumption data of electricity consumers with energy service providers for the provision of flexibility services. Specifically, we focus on the provisions of the Data Act regarding the sharing of data from ‘connected products’ and whether and how they impact the way in which smart meters and dedicated measurement devices are treated under sectoral EU electricity legislation, highlighting the uncertainty regarding the application of the Data Act and pointing out new rights and obligations which could derive from such application.