Alternator output amp meter? Anyone fitted one?

Blaaa, I just bring a jump back. Haven’t needed it but helped some others.

oh, and if you buy a truck fridge or whatever, the manual tells you the amp draw.

RustyGreen covered it all already anyway

 

And they can't drive a stick either....

 

I think something like Victron's smart shunt would get you the info you are after? Just depends on how / where you wire it into the system.

https://www.victronenergy.com/battery-monitors/smart-battery-shunt#pd-nav-thirdimage

 

Spiffy bit of kit, but anything that needs a wireless phone is off my list of "useful".

"Never underestimate the bandwidth of a VW bus loaded with CD's heading cross country" ;-)

 

considering what it's being connected too,,,, I wouldn't overthink it.
Now, if you were riggin' up an ol 50-60s air cooled VW, I could see your point.
In the end; it's yours, so make it your own, I respect that. If you want a marriage of early 20th century with 21st century, then do it.