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electrical:12v:charging

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electrical:12v:charging [2020/01/13 11:00]
frater_secessus [temperature compensation] 		electrical:12v:charging [2020/05/13 12:18]
frater_secessus
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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
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 +
 +> 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 deep cycle batteries ====== ====== charging deep cycle batteries ======
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 In practice absorption takes longer when the battery has been discharged deeply and shorter when it has not.((http://www.cheaprvliving.com/forums/Thread-Can-a-solar-panel-and-charge-controller-over-charge-a-battery?pid=96965#pid96965)) In practice absorption takes longer when the battery has been discharged deeply and shorter when it has not.((http://www.cheaprvliving.com/forums/Thread-Can-a-solar-panel-and-charge-controller-over-charge-a-battery?pid=96965#pid96965))
 +
 +**Mythbuster:** although it is commonly said that Vabs is attained at ~80% capacity...
 +
 +> charge current affects the SOC transition point from bulk to absorption charging - MaineSail((https://marinehowto.com/how-fast-can-an-agm-battery-be-charged/))
 +
 +MaineSail found that 
 +
 +  * charging AGM at C/2.5 (max rate) resulted in the battery being 63.3% "full" at Vabs and being fully charged in **5hrs, 30 minutes**
 +  * charging AGM at C/5 (min rate) resulted in the battery being 77.4% "full" at Vabs and being fully charged in **5hrs, 42 minutes**
 +
 +
  
 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:
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 **Manual chargers** will not be affected by load as they are controlled by the user. **Manual chargers** will not be affected by load as they are controlled by the user.
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 +
 +===== battery voltage while charging =====
 +
 +Battery Voltage = Battery Voc((resting voltage)) + (Charge Current x Ri((internal resistance)))
  
  
  
electrical/12v/charging.txt · Last modified: 2023/09/16 12:22 by frater_secessus

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