Solar Panels- Wired in Series vs. Parallel question

hypoxia wrote:
Series provides a higher voltage which allows the use of smaller wiring to the controller. If wire size is not a factor then parallel is best.

You can't just pick and choose at random.

It is best if the panels are designed for the voltage of the system and are wired in parallel.

Or are designed for half system voltage and wired in series.
There is NO good reason, for example, to wiring two 12V panels in series (for 24 V) and then having to drop the voltage back down again with extra electronics.