Kerning correction works if the capital letter is in front of the small letter. The other way round spaces seems uneven.
Take for example the space between the e and V in the word PeVatron. It seems to be bigger than the space between V and a. How to automatically make both spaces the same width? (without manually inserting \kern, \hskip etc.)
The happens also within units, like kV etc.
\documentclass{article}
\usepackage{siunitx}
\begin{document}
PeVatron
\si{\kilo\volt}
\end{document}
