solid versus stranded

This is my first post on this site, so first let me say, wow, there's some really good info here. Now to my question; I have tons of experience with sound systems, just not of the mobile variety. I am aware of the technical reasons for stranded wire in audio applications, but could someone refresh my memory on how this relates to DC in general? I am sprucing up my conversion van a little bit, which requires longer runs than you might think. I have lots of solid wire in my shed, are there any reasons why I shouldn't use it for power, grounds, or remotes?

Stranded wire is much more reliable than solid wire in the high vibration environment of a vehicle.  And it is harder to run through the vehicle.  The solid wire will break eventually. 

I use west penn wire for my truck. Its commercial industrial pro audio rated. I twisted all lengths to about 3 twists per inch for noise cancellation. Works perfect-costs nothing.This is what I do for FUN!