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--- opinion:frater_secessus:agm2lifepo4 [2024/10/07 11:20]
frater_secessus [excess current]
+++ opinion:frater_secessus:agm2lifepo4 [2025/02/19 12:20] (current)
frater_secessus [Can I still use my existing DC-DC charger for alternator charging?] changed language
@@ Line 125: / Line 125: @@
 If it was already handling a similar-size AGM bank then it will probably be fine.
-Caveat:  charging LFP with DC-DC //can// be somewhat harder on the alternator than charging AGM with DC-DC.  AGM current acceptance tapers in Absorption which means the DC-DC will not be demanding full powah from the alternator.  Depending on the setup Lithium can make the "full pull" until the bank is near full charge. In practice this might only make a real difference with long drives and heavily discharged batteries.
+Caveat:  charging LFP with DC-DC //can// be somewhat harder on the alternator than charging AGM with DC-DC.  AGM charging current spends less time at full charging current because it spends less time in Bulk (full current) and more in Absorption (tapering current).   Depending on the setup Lithium can make the "full pull" until the bank is near full charge.
 An esoteric caveat:  it's conceivable there are edge cases where a vandweller has an oversized DC-DC charger (60A?) that has not destroyed a small alternator (90A?) yet because the small lead bank (100Ah?) has only been pulling a fraction of the alternator's capabilities.  Shoehorning in a 300Ah LFP bank would max the 60A charger and place serious demands on the undersized alternator.

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