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electrical:12v:charging [2019/01/03 13:50]
frater_secessus
electrical:12v:charging [2019/01/03 13:52] (current)
frater_secessus
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-=== charge-and-hold ===+===== charge-and-hold ​=====
 Charging can be achieved with a simpler methods like charge-and-hold where the charger has a single setpoint which it holds; ​ current will drop as the battery accepts less.  ​ Charging can be achieved with a simpler methods like charge-and-hold where the charger has a single setpoint which it holds; ​ current will drop as the battery accepts less.  ​
  
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-=== charge-and-stop ===+===== charge-and-stop ​=====
  
 [[electrical:​solar:​charge_controller#​shunt_controllers|Shunt chargers]] have a charge-and-stop approach where they: [[electrical:​solar:​charge_controller#​shunt_controllers|Shunt chargers]] have a charge-and-stop approach where they:
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 Charge-and-stop may be useful when charging battery chemistries like lithium, or when [[electrical:​solar:​shallow_cycling|shallow-cycling]]. Charge-and-stop may be useful when charging battery chemistries like lithium, or when [[electrical:​solar:​shallow_cycling|shallow-cycling]].
  
-=== charging AGM batteries ===+===== charging AGM batteries ​=====
  
 AGM batteries are kept healthy by: AGM batteries are kept healthy by:
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 Many charge controllers have AGM or GEL modes that handle these setpoints and durations. Many charge controllers have AGM or GEL modes that handle these setpoints and durations.
  
-=== charging other chemistries ===+===== charging other chemistries ​=====
  
 See [[electrical:​12v:​lifepo4_batteries_thread#​charging|LiFePO4 (lithium) charging]] ​ See [[electrical:​12v:​lifepo4_batteries_thread#​charging|LiFePO4 (lithium) charging]] ​
  
-=== equalization ===+===== equalization ​=====
  
 Sometimes called the fourth stage, "​equalizing is an overcharge performed after fully charging deep-cycle flooded/wet batteries. An equalizing charge prevents battery stratification and reduces sulfation which are leading causes of battery failure. Trojan recommends equalizing every 30 days or when batteries have a low specific gravity reading after fully charging... Deep-cycle AGM or gel batteries should NEVER be equalized."​((http://​www.trojanbattery.com/​pdf/​TrojanBattery_UsersGuide.pdf)) Sometimes called the fourth stage, "​equalizing is an overcharge performed after fully charging deep-cycle flooded/wet batteries. An equalizing charge prevents battery stratification and reduces sulfation which are leading causes of battery failure. Trojan recommends equalizing every 30 days or when batteries have a low specific gravity reading after fully charging... Deep-cycle AGM or gel batteries should NEVER be equalized."​((http://​www.trojanbattery.com/​pdf/​TrojanBattery_UsersGuide.pdf))
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-=== temperature compensation ===+===== temperature compensation ​=====
  
 Accurate charging requires the charger know the temperature of the batteries being charged. In hot temps a full charge will require somewhat lower voltage. Cold temps will require higher voltage((https://​handybobsolar.wordpress.com/​the-rv-battery-charging-puzzle-2/​)),​ enough to trip overvoltage protection in some 12v gear. Accurate charging requires the charger know the temperature of the batteries being charged. In hot temps a full charge will require somewhat lower voltage. Cold temps will require higher voltage((https://​handybobsolar.wordpress.com/​the-rv-battery-charging-puzzle-2/​)),​ enough to trip overvoltage protection in some 12v gear.
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   - in the absence of actual measurements the charger will likely use the 77F laboratory standard.   - in the absence of actual measurements the charger will likely use the 77F laboratory standard.
  
-=== watering batteries ====+===== watering batteries ​======
 {{ http://​www.trojanbattery.com/​wp-content/​uploads/​2013/​07/​WaterDia_B.jpg?​150}} {{ http://​www.trojanbattery.com/​wp-content/​uploads/​2013/​07/​WaterDia_B.jpg?​150}}
 Flooded lead-acid batteries outgas during Absorption, causing a slow loss of water. ​ They outgas intentionally in Equalization. ​ To counteract this, the '​dweller must remove the caps and inspect the water level. ​ If low, distilled water is added. Flooded lead-acid batteries outgas during Absorption, causing a slow loss of water. ​ They outgas intentionally in Equalization. ​ To counteract this, the '​dweller must remove the caps and inspect the water level. ​ If low, distilled water is added.
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-=== charging while using the 12v system ===+===== charging while using the 12v system ​=====
  
 Smart chargers handle charging under load gracefully. As long as there is enough solar power coming in to hold the absorption or float voltage steady those charging stages will not be disturbed. If there is not enough power to hold the prescribed voltage the charger may restart Bulk charging. This behavior may be configurable by the user. Smart chargers handle charging under load gracefully. As long as there is enough solar power coming in to hold the absorption or float voltage steady those charging stages will not be disturbed. If there is not enough power to hold the prescribed voltage the charger may restart Bulk charging. This behavior may be configurable by the user.
electrical/12v/charging.txt ยท Last modified: 2019/01/03 13:52 by frater_secessus