This roadmap aims to increase understanding among a range of stakeholders of the applications
that electricity and thermal energy storage technologies can be used for at different
locations in the energy system. Emphasis is placed on storage technologies that are
connected to a larger energy system (e.g. electricity grid), while a smaller portion
of the discussion focuses on off-grid storage applications. This focus is complemented
by a discussion of the existing technology, policy, and economic barriers that hinder
energy storage deployment. Specific actions that can be taken to remove these obstacles
are identified for key energy system stakeholder groups.