In April 2016, interested Member states/Associated countries, stakeholders and the European Commission held the kick off meeting of the SET Plan temporary working group (TWG) on Solar thermal energy. This TWG has met regularly times during 2016 and 2017 to draft an Implementation plan that contains concrete R&I activities, and proposes relevant funding opportunities for their realization, which are considered essential for achieving the agreed set of targets. The TWG, chaired by national representatives from Spain and co-chaired by the European Solar Thermal Electricity Association, the European Association of Gas and Steam Turbine Manufacturers, and the Joint Programme on CSP of the European Energy Research Alliance presented its first draft version of the CSP Implementation plan to the SET Plan Steering Group members in March 2017. The Implementation plan was then endorsed by the Steering Group members on 14 June 2017, pending further information on financing tools and instruments. The final version of the Implementation plan was endorsed by the SET Plan Steering Group members at the meeting held on 27 September 2017.