On 02/05/2020 16:52:58, Dave Plowman (News) wrote:
In article ,
Andy Burns wrote:
The Natural Philosopher wrote:

Alternators are good for at least 15A. I wouldn't be surprised if they
can't mostly manage over 50A if needs be

Oh.. treble that

yep, mine is rated 140A

So you are guessing it charges a low battery at 140 amps? ;-)

For the few seconds to a minutes of a flat batter I can well believe
that may be the case. As soon as the terminal voltage goes to 14.5V or
the regulated charge current will naturally tail to a more modest value.

There is very little literature on battery charging, of when a charging
device might switch from constant current to constant voltage at
different initial charging currents.