Lithium batteries and alternator protection.

Tom/Barb wrote:

otrfun wrote:
You haven't been particularly forthcoming with the current/voltage at your battery/alternator, charger input, charger output, and battery terminals. Having this information clarifies exactly you're Victron is doing---no smokescreens. The hundred dollar question: is your charging current purposely limited based on the use of lower charging voltages, or is your charging current limited due to excessive voltage drop due to undersized wiring?

As for high duty cycles, we've pulled the maximum rated charge current from our 40a Renogy dc to dc charger for up to 3-4 hours at a time, at least 50 times over the last year, with zero issues. Renogy is far from an upper-tier product like Victron. I would suspect you'd have zero issues doing the same with your Victron.

my questions/answers are directed to the Victron 12-12 30 DCtoDC charger.

The main inverter/charger in the coach is a Victron 3000W wired to a 50 AMP chord plugged into our house or camp ground post.
Managed by a 50 amp progressive Electrical management system.

Not sure if you're trying to be obtuse, or your reply was meant for another post.

Bottom line, if you don't know the voltage/current readings at all your critical I/O points, then you haven't accomplished the minimum due diligence necessary to determine whether your system is truly operating as designed or not.