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electrical:12v:charging [2020/05/13 09:22]
frater_secessus
electrical:12v:charging [2020/07/08 08:29] (current)
frater_secessus [float stage]
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-[[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))
  
  
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 Some controllers will allow the user to configure the time or ratio of capacity/​current (C///​n//​). ​ Sternwake says: 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 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]]**.
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 Common Vfloat values range between 13.2v for stored batteries to 13.8v for banks that are deep cycled each day. 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]]
  
  
electrical/12v/charging.1589386945.txt.gz · Last modified: 2020/05/13 09:22 by frater_secessus