Reviewers assist the editor in making decisions and can also assist the author to improve the quality of the manuscript.

A guest reviewer, if he does not feel sufficiently competent to assess the research presented in the manuscript, or if he is unable to provide his opinion in time, should inform the editor without delay, in order to give him the time to contact other reviews.

All manuscripts should be treated as confidential documents. They should not be shown to anyone without the permission of the editor.

Reviewers are asked to give their opinion on the strengths and weaknesses of the manuscript and on the following points:

• The subject matter is suitable for publication in Journal of Renewable Energies
• The information presented is new
• The methodology is clearly described
• The results are clearly described and discussed
• The conclusion is supported by the data
• The abstract is informative and concise
• The English is satisfactory.
• Recent references relevant to published work are included
• The Illustrations and Tables are well presented.

Reports must be objective. Personal critical remarks addressed to the author are not admissible. The reviewer's opinion must be clear and reasoned. The reviewer should identify appropriate recent publications not cited by the author. Any indication must be accompanied by an appropriate comment. The reviewer should draw the editor's attention to any similarities or overlaps between the manuscript and previously published material.

Information and ideas obtained by anonymous reviewers are confidential and should not be used for the personal benefit of the reviewer. Reviewers should not accept a manuscript reviewer if it may create a conflict of interest resulting from competitive, collaborative, or other relationships with the authors.