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--- electrical:12v:eternal_absorption [2020/07/08 12:10]
frater_secessus [set Vfloat to Vabs]
+++ electrical:12v:eternal_absorption [2020/07/08 15:00]
frater_secessus [set Vfloat to Vabs]
@@ Line 1: / Line 1: @@
 Note:  this is for deep cycle lead chemistries only.!  Lithium chemistries should not be held at full voltage.
+[[lifestyle:words_of_wisdom|Words of wisdom]]:
+> "As long as... you cycle the battery daily, you could set float voltage to [Vabs] too without worry. Only when you stop cycling the battery do you need to return float voltage to more regular 13.2v levels." -- sternwake((http://www.cheaprvliving.com/forums/showthread.php?tid=20022&pid=229883#pid229883))
 ====== dealing with insufficient Absorption ======
@@ Line 11: / Line 17: @@
   * solar conditions - not enough good sun long enough to finish Absorption
-===== set Vfloat to Vabs =====
+===== workaround  =====
 The Eternal Absorption approach completely forgoes Float stage, forcing the controller to stay in Absorption by setting Vfloat to Vabs. This addresses the controller issues above.  It will not address the insolation problem on a given day, but extended Absorption will help reduce damage from previous days of poor harvest.
@@ Line 26: / Line 32: @@
   * increased Vabs duration will require more frequent watering, due to increased outgassing
+  * calcium-enhanced batteries (typically starter batteries and some hybrid "marine" batteries) can be damaged((positive grid corrosion)) by long periods of excess voltage.    The question is which is worse for them:  undercharging or overvolting.

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