> What is input energy? Is it all the energy from the sun or is it only the energy within the energy band that the panel can "see"? What is efficiency? The efficiency for different energy band is different for each solar panel as well

Don't research/industries usually come up with unambiguous terms and units for these things so they can compare metrics? e.g. Our prototype showed 94% VSE. VSE: "Visual Spectrum Energy" is the input energy between 400-650nm as measured by ... "