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--- opinion:frater_secessus:charging_faster [2020/11/04 16:24]
frater_secessus [lead-acid]
+++ opinion:frater_secessus:charging_faster [2023/07/15 11:05] (current)
frater_secessus [lithium]
@@ Line 31: / Line 31: @@
-**Lithium batteries** can slurp up current wildly, but shouldn't for their own health.  Lithium lasts longest in sub-C use (ie, less than 100A for a 100Ah Li bank).  C/2 (50A) is a more common limit to keep from stressing them. In commercial examples the BMS will limit current to protect the cells.  A small [[electrical:12v:b2b|DC-DC charger]] can help protect bare cells from their own greediness.
+**Lithium batteries** can slurp up current wildly, but shouldn't for their own health.  Lithium lasts longest in sub-C use (ie, less than 100A for a 100Ah Li bank).  0.5C (50A) is a more common manufacturer recommendation, and folks [[electrical:12v:drop-in_lifepo4#an_approach_to_greater_longevity|striving for added longevity]] might limit it to 0.2C (20A). There is some evidence that 0.4C rates are acceptable for long life when combined with gentle charging voltages like 3.45Vpc.((FIXME  - insert Rod's testing of 2011 bank here))
+In commercial examples the BMS will limit current (typically to 1C) to protect the cells.  A small [[electrical:12v:b2b|DC-DC charger]] can help protect bare cells from their own greediness.
+Limiting charging  current also makes it easier on alternators when they are used to charge Li.

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