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--- electrical:12v:charging [2020/05/13 12:18]
frater_secessus
+++ electrical:12v:charging [2020/07/08 11:29]
frater_secessus [float stage]
@@ Line 1: / Line 1: @@
-[[lifestyle:words_of_wisdom|Words of wisdom]]: “Three stage chargers are easier on your batteries, charge them faster, fuller and help you use less water”((https://handybobsolar.wordpress.com/the-rv-battery-charging-puzzle-2/)) – HandyBob
+[[lifestyle:words_of_wisdom|Words of wisdom]]
+> “Three stage chargers are easier on your batteries, charge them faster, fuller and help you use less water”((https://handybobsolar.wordpress.com/the-rv-battery-charging-puzzle-2/)) – HandyBob
-> A [[[electrical:shore_power|shore power]]] charger is a stiff source with unlimited energy and time. Your solar is a very soft source of unknown power and only a few hours to get the job done.  - sunking((https://www.solarpaneltalk.com/forum/off-grid-solar/batteries-energy-storage/299490-bulk-absorb-float-equalize-what-does-it-mean#post299490))
+> A [ [[electrical:shore_power|shore power]] ] charger is a stiff source with unlimited energy and time. Your solar is a very soft source of unknown power and only a few hours to get the job done.  - sunking((https://www.solarpaneltalk.com/forum/off-grid-solar/batteries-energy-storage/299490-bulk-absorb-float-equalize-what-does-it-mean#post299490))
+> Charging lead acid batteries is not something that you decide to do, or start or stop. The old statement, "I need to idle the engine for a few minutes to "top off" the batteries." is a prescription for turning expensive batteries into paper weights. You want a system that puts the batteries on charge automatically, every time there is even a single ray of sun or that your engine is running -- DiploStrat((https://expeditionportal.com/forum/threads/dual-battery-system-with-ctek-d250-not-charging-battery-over-12-volts.174927/post-2342346))
@@ Line 57: / Line 61: @@
 Some controllers will allow the user to configure the time or ratio of capacity/current (C///n//).  Sternwake says:
 > If your charge controller only holds [absorption] voltage for an hour or two, that is likely not enough time. As long as [there is a load] and you cycle the battery daily, you could set float voltage to 14.8v((for example - secessus)) [to match absorption] without worry. Only when you stop cycling the battery do you need to return float voltage to more regular 13.2v((for example - secessus)) levels. Premature application of float voltage by automatic charging sources is a battery killer.((http://www.cheaprvliving.com/forums/Thread-Solar-or-Battery-Problem?pid=229883#pid229883))
+If Absorption cannot be completed in the max amount of time configurable in the controller (due to damaged/old batteries), **charging at the minimum rate and/or at higher voltage may help [[electrical:severe_battery_use|compensate]]**.
@@ Line 65: / Line 73: @@
 Common Vfloat values range between 13.2v for stored batteries to 13.8v for banks that are deep cycled each day.
+also see [[electrical:12v:eternal absorption|Setting Vfloat to Vabs]]

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