12V is high compared to a lot of <5V electronics that do "the thinking" for 12V & 24V power systems that do "the work" in a lot electric systems around the worl

12V is high compared to a lot of <5V electronics that do "the thinking" for 12V & 24V power systems that do "the work" in a lot electric systems around the world. As for the heating up... https://www.youtube.com/watch?v=nbGcSjRAyxs https://www.youtube.com/watch?v=nbGcSjRAyxs is a good demo of how fast 12V can heat up a small hunk of metal given enough amperage (in the case of that video 12V at 100A) . There are a surprising amount of 12V and 24V DC power systems (like in that video) can push in well over a kilowatt (12V at >100A or 24V at >50A) of power in a dead short situation. My father had a paperweight in his shed that looked like someone used a spanner as a fork for lava, drooped away from its normal shape like a Salvador Dali clock, one end barely recognisable with blackened carbonisation marks and a ragged but lightly polished place where it was cut clean from something with an angle grinder. 24V at 150A for just a few seconds before the batteries were discharged, big marine batteries for lots of current to kick start an old heavy duty engine, lots of Amps but not many Amp Hours, still enough to destroy the spanner.