Long-term energy scenarios (LTES), which have been used for many decades as a

vital planning tool for governments, can also serve to guide the transition to a clean,

sustainable and increasingly renewable-based energy system. The Long-term Energy

Scenarios for the Clean Energy Transition campaign, also known as the LTES campaign

was initiated in May 2018 under the Clean Energy Ministerial (CEM) to promote the

improved use and development of LTES for the clean energy transition. The campaign is

led by the governments of Denmark and Germany, and co-ordinated by the International

Renewable Energy Agency (IRENA).

This report assesses a collection of recommendations and country experiences gathered

through the activities of the LTES campaign and the LTES Network (IRENA’s extension of

the LTES campaign to cover non-CEM countries). These activities included over 26 events

in 10 different countries and a webinar series with more than 20 experts showcasing

examples of the value and effective use of scenarios in governments and technical

institutions supporting countries’ clean energy transition planning processes.