The Institute for Diversification and Saving of Energy (IDAE), is an agency of the Spanish Ministry of Industry, Energy and Tourism, and linked to the Ministry of Energy.

Its strategic purpose is to contribute to improved energy efficiency, and the increased uptake of renewable energy and other low carbon technologies.

IDAE conducts dissemination and training activities, technical assistance, program development and specific project funding. The Institute also leads a wide range of international activities under various European programs and in cooperation with third countries. 

IDAE has provided funding for the REEEP network in Latin America.