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electrical:12v:charging [2019/01/03 13:52]
frater_secessus
electrical:12v:charging [2019/05/20 05:57] (current)
frater_secessus [watering batteries] bloop
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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]] ​(on/off) chargers ​have a charge-and-stop approach where they:
   - charge to [[electrical:​12v:​hvd|High Voltage Disconnect]] (Vhvd) and stop   - charge to [[electrical:​12v:​hvd|High Voltage Disconnect]] (Vhvd) and stop
   - fall in voltage to a High Voltage Reconnect (Vhvr)   - fall in voltage to a High Voltage Reconnect (Vhvr)
   - repeat   - repeat
    
 +**This differs from PWM** because PWM can hold an average voltage by cutting power hundreds or thousands of times a second. ​ If you make a setpoint for 13.6v it will hold 13.6v as long as sun and [[electrical:​12v:​loads|loads]] cooperate. ​ A shunt programmed to charge to disconnect at 13.6v and reconnect at 12.7v will average 13.05v.
 +
 +
 These setpoints may or may not be user-configurable. These setpoints may or may not be user-configurable.
  
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 AGM batteries are kept healthy by: AGM batteries are kept healthy by:
  
-  - vigorous Bulk chargingsometimes greater than solar-only charging can provide.((http://​www.cheaprvliving.com/​forums/​Thread-anyone-familiar-with-Worker-AGM-batteries?​pid=97068#​pid97068)) ​ Consider augmenting with alternator or shore power charging.+  - vigorous Bulk charging((minimum current of [[electrical:​12v:​battery_capacity|C/​5]] up to C/3)) sometimes greater than solar-only charging can provide.((http://​www.cheaprvliving.com/​forums/​Thread-anyone-familiar-with-Worker-AGM-batteries?​pid=97068#​pid97068)) ​ Consider augmenting with alternator or shore power charging.
   - long Absorption stages   - long Absorption stages
   - but lower Absorption voltage (to prevent outgassing)   - but lower Absorption voltage (to prevent outgassing)
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-Water levels ​should be topped ​off //after// equalization.((exposed plates should be covered before EQ, though)) Doing so before equalization could result in spillover.+If water levels ​are below the plates, add enough water to cover the plates before equalizing. ​ Then top off //after// equalization. ​ ​Topping off before equalization could result in spillover ​and loss of electrolyte.
  
  
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-A [[http://​amzn.to/​2gEtVwL|battery waterer]] can make the job easier, and does not require one to judge water level visually.+A [[http://​amzn.to/​2gEtVwL|battery waterer]] can make the job easier, and does not require one to judge water level visually.  The water "​bloops"​ as it fills and stops blooping when the water is at the correct level
  
 Batteries that are older, in poorer health, or are charged at higher voltages will be "​thirstier"​. ​ Check water levels 1x/month until you know how they behave. Batteries that are older, in poorer health, or are charged at higher voltages will be "​thirstier"​. ​ Check water levels 1x/month until you know how they behave.
electrical/12v/charging.1546552342.txt.gz ยท Last modified: 2019/01/03 13:52 by frater_secessus