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The link at https://www.redarc.com.au/alternator-vs-fixed-alternator describes the difference in how a "smart alternator" vs a regular alternator of the days of yore worked. While they are selling a device to allow effective charging of a second battery on a vehicle with a smart alternator the description and graphs they show are useful in helping us understand how our alternators work. I found it particularly interesting that the smart alternator system does not aim to fully charge the starting battery. This may explain why I have found the need to periodically top up the batteries on my 2014 Ram and 2018 Pacifica in the winter.

Perhaps someone here has more details on how the charging system on our vehicle works. If so, post up.
 

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No idea, but I have also found it useful to charge the battery in my '15 ram and '14 ford escape with a charger to full.
 
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