The California Public Utilities Commission is the first U.S. regulatory entity to issue a sweeping set of guidelines for managing and protecting consumers’ data around energy use. The goal is to allow startups and corporate giants alike to access that data to make homes more energy-efficient and eventually build “smart home” networks. But while the recently released guidelines are critical for the smart grid industry to track, they pose at least as many questions as answers, and will doubtless be open to multiple interpretations in the coming months. Companies mentioned in this report include Google, Microsoft, Control4, Tendril and HP. For a full list of companies, and to read the full report, sign up for a free trial.