Gdetrailer wrote:
I remember yrs ago, there used to be an outfit that sold "upgrade" windings for 1950's-1980's alternators which would take a 35A alternator and get you 45A-60A.
Quick Start High Output AlternatorsGdetrailer wrote:
More current also means that they will have to add several extra diodes in the output of the alternator or use higher current diodes, both of these outcomes requires more internal space in the alternator and additional cooling.
The same place sells external rectifiers (diodes). IMHO, they are not required. Higher current diodes are the same size
(obviously up to some limit)Gdetrailer wrote:
Now days, things have gotten a lot more complicated, most manufacturers have now put the body control computer in charge of the charging system and the body control computer now regulates what the alternator can and can't do.
Actually, my experience has been the powertrain control computer talks to the alternator, primarily because the alternator may request more engine speed.
Gdetrailer wrote:
While you can add in a heavy 12V load for short bursts, I would not really recommend do that for long periods of time like heavy charging of your RV battery under idle conditions.
Define "heavy" ? If the typical vehicle load, at idle, is 40 A and you have an alternator capable of 100A, the alternator will just call for more engine speed.
(Alternator don't reach max capacity until about 2000 engine RPM.)Most trailer tow packages include a heavy duty alternator. If not, that is a good upgrade.
