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--- electrical:12v:deep_cycle_battery [2019/03/07 17:31]
frater_secessus [LiFePO4]
+++ electrical:12v:deep_cycle_battery [2019/10/01 12:38]
frater_secessus [Non-LiFePO4 lithium-ion]
@@ Line 169: / Line 169: @@
   * can be damaged by heat
-For best life (and to decrease the likelihood of cell imbalance) Charge to 13.8v and disconnect voltage at 12.6v.((http://www.cheaprvliving.com/forums/showthread.php?tid=17442&pid=195503#pid195503)), ((http://www.cruisersforum.com/forums/f14/lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069.html#post740260)), ((http://www.cruisersforum.com/forums/f14/lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-4.html#post747996)), ((http://www.cruisersforum.com/forums/f14/lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-7.html#post812380))
+BMS-equipped LFP banks should be charged according to manufacturer's specs.  Bare cell charging is discussed [[electrical:12v:lifepo4_batteries_thread|on its own page]].
-The batteries can be charged with either a [[electrical:solar:charge_controller|charge controller]] with a LifePO4 profile, or a [[electrical:12v:charging|smart charger]] with programmable setpoints.  If the latter, something like a "Bulk" charge at 13.8, minimal "absorption", and "float" in the 13.25-13.4v range.((http://www.cheaprvliving.com/forums/showthread.php?tid=14960&pid=160365#pid160365))
-Technomadia charge to 14.2v, use a minimal "absorption", and "float" at as the setpoint , float at 13.6v.((http://www.technomadia.com/2012/09/a-year-on-lithium-rv-batteries/))
 Further reading:
@@ Line 185: / Line 186: @@
-There are hobbyists who build 4S packs and undercharge the cells to only 3.7v.  This gives an operating range of 14.8v - 12v, a much better fit for nominal 12v systems. The downside is this configuration only uses 58% of the cells' capacity and will require more cells to achieve the same amount of Ah.
+There are hobbyists who build **4S packs** and undercharge the cells to only 3.7v.  This gives an operating range of 14.8v - 12v, a much better fit for nominal 12v systems. The downside is this configuration only uses 58% of the cells' capacity and will require more cells to achieve the same amount of Ah.
 **7S builds** make a decent **24v bank**.  They are 29.4v fully charged and 21v discharged, compared to lead acid's 29.6v max voltage and 24.2v 50% DoD cutoff.  Discharging 7s li-ion to 24v((3.42v/cell) could help avoid LVD, making 35% of the cells' capacity unusable.

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