Publication：
All accepted (Registered & Presented) papers of REEE 2021 will be collected in the E3S conference proceedings (eISSN: 2267-1242), which is indexed by *Scopus*, *Ei Compendex*, Google Scholar, CAS, DOAJ, EBSCO, ProQuest, etc.
Special Issue-Energies(ISSN 1996-1073)
Prize for the best full paper will be the publication of 1 (one) paper in Special Issue in Energies (ISSN 1996-1073; CODEN: ENERGA).--Impact Factor: 2.702 (2019) ;5-Year Impact Factor: 2.822 (2019)
Program Chairs：
Prof. Muhammad Shakeel Virk, University of Troms?, Norway
Prof. Carlos Felgueiras, Polytechcnic of Porto, Portugal
Local Chair：
Prof. Nidia Caetano, Polytechcnic of Porto, Portugal
Guest editors：
Prof. Jorge Loredo, University of Oviedo, Spain
Prof. Jin Su Jeong,Universidad de Extremadura, Spain
Contact：
Melanie Li Xiao
E-mail: reee_conf@vip.163.com
