Discuss any topic in relation with Solar Energy or Renewable Energy

Discuss any topic in relation with Solar Energy or Renewable Energy

A good research paper on renewable energy or any type of renewable energy
Paper is purposed for Journal academic publication in Elsevier Journal.
The methodology should be apt with the usage of primary and secondary data along with graphs and formulas where necessary
The paper should be written in a professional way.
You are free to choose any topic, but it must be related to renewable energy

Please for emphasis, the paper is written with the purpose of Journal Publication. If paper quality is low, it will not be accepted.