In the framework of the REEEM project, the development of three technology and innovation roadmap is planned to highlight the role of innovation and technologies in the transition pathways toward a low carbon EU society. This report presents the second roadmap dedicated to renewable energy integration. The primary findings of this roadmap are consolidated in a stakeholder workshop in April 2018 in Brussels. The outcome of this report will provide a market outlook and techno-economic data projections for renewable energy technologies (i.e., wind power, solar PV power, and ocean power). It also provides inputs for the modelling activities in the REEEM project, particularly to model the EU transition to a low-carbon society according to a Base Pathway and two cases derived from it (one with high renewables penetration and one with expected breakthrough in floating foundation offshore wind and building-integrated PV). This report will be complemented by IRL reports, assessing and evaluate innovation readiness of selected renewable energy technologies