Couple of questions about DC-Dc charging
I've been thinking about adding a DC-DC charger now that I've added 400 amp hours of AGM batteries. There are lots of useful posts but I haven't run into a couple of things I'm curious about. One ...
Forum Discussion
MEXICOWANDERER wrote:
ALTERNATOR CAPACITY
I know of no current OEM alternator that can endure maximum amperage output for other than a few minutes. The design limitation is primarily in the rectifier system principally heat sink radiating area in conjunction with airflow temperature and CFM. There is no magic design formula, and increasing the capacity of the rectifiers is not a magic solution. A heat sink is good for so many vf watts of saturation and no more. Extremes in temperature cooling air inlet aggravates the limitation.
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This is intended as a general overview. I hope it will suffice.
that was great and confirmed what I thought, Ill have to dig into the altanator types a little more as what I found they started using versions of mine in 20004 but that could be special cases.
for myself I do have a 200ish amp ecu controled altanator and I am looking at running it with the 40Amp DC to DC charger and I am also planing to run big enough cable to the charger to keep the voltage drop to less than 1%. I am hoping to keep my load from the DC to DC when it is at its max out put to a point where the altanatore never sees over 50% usage in a normal situation.
Steve
