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electrical:solar:shallow_cycling

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electrical:solar:shallow_cycling [2018/06/16 20:48]
frater_secessus [non-cycling] 		electrical:solar:shallow_cycling [2020/01/13 16:41]
frater_secessus [effect on starter battery]
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 ==== how it works ==== ==== how it works ====
  
-  - a simple [[electrical:solar:charge_controller#shunt_controller|shunt charge controller]] holds the battery at a mild Absorption voltage (14.0, - 14.2v) when charging, just below the significant gassing point+  - a simple [[electrical:solar:charge_controller#shunt|shunt charge controller]] holds the battery at a mild Absorption voltage (14.0, - 14.2v) when charging, just below the significant gassing point
   - the controller's LOAD output disconnects (LVD) at 100% SoC (~12.7v)   - the controller's LOAD output disconnects (LVD) at 100% SoC (~12.7v)
   - the controller's LOAD output //re//connects (LVR) at ~13.0v);  see discussion below   - the controller's LOAD output //re//connects (LVR) at ~13.0v);  see discussion below
-  - power is //only// taken from the controller's LOAD output;((or from a circuit control by a relay on the LOAD output)) this ensures the starter battery is never discharged below the intended setpoint+  - power is //only// taken from the controller's LOAD output;((or from a circuit control by a relay on the LOAD output)) this ensures the starter battery is never discharged below [[electrical:12v:lvd|the intended setpoint]]
  
 === Low Voltage Reconnect (LVR) setpoint === === Low Voltage Reconnect (LVR) setpoint ===
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 ===== shallow-cycling ===== ===== shallow-cycling =====
  
-//Shallow-cycling// is a more aggressive approach, allowing for a bit of power after sundown.  It is most **suitable for starter batteries with removable cell caps**.+//Shallow-cycling// is a more aggressive approach, allowing for more power in the daytime and some power for use after sundown.  It is most **suitable for starter batteries with removable cell caps**.
  
 The charging setpoint is set somewhat higher, ~14.4v.  This will result in minor outgassing and a bit more power (**76.18W** using the panel data above).  [[electrical:12v:charging#watering_batteries|Battery watering]] is mandatory. The charging setpoint is set somewhat higher, ~14.4v.  This will result in minor outgassing and a bit more power (**76.18W** using the panel data above).  [[electrical:12v:charging#watering_batteries|Battery watering]] is mandatory.
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 +Anecdote:  TreborEnglish runs his 75A flooded 12v wally world deep cycle to 87% SoC regularly and it has lasted 3 years as of this writing.  He reports it requires 20-30ml of water/month.((https://www.reddit.com/r/vandwellers/comments/enwq70/best_car_battery_for_van_life/fe670is/))
  
electrical/solar/shallow_cycling.txt ยท Last modified: 2023/04/08 13:41 by frater_secessus

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