Solar Panel Posted on 21st December 201528th May 2019 by ThePD (The Project Definition) A Solar Panel refers to the Solar Cell or Solar Module. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Engineering and tagged energy, renewable energy, solar energy. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.