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electrical:12v:charging

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electrical:12v:charging [2019/01/03 16:52]
frater_secessus
electrical:12v:charging [2019/05/17 21:09]
frater_secessus [charging AGM batteries] added C
Line 59: Line 59:
 ===== 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.
  
Line 72: Line 75:
 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)
Line 92: Line 95:
  
  
-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.
  
  
electrical/12v/charging.txt ยท Last modified: 2023/09/16 12:22 by frater_secessus