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electrical:solar:shallow_cycling

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electrical:solar:shallow_cycling [2020/07/08 15:48]
frater_secessus [staged charging] 		electrical:solar:shallow_cycling [2020/11/30 17:57]
frater_secessus [components]
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 ==== how it works ==== ==== how it works ====
  
-  - a simple [[electrical:solar:charge_controller#shunt|shunt charge controller]] holds the battery at a mild Absorption voltage (14.0, - 14.2v, see notes [[electrical:solar:shallow_cycling#charging_voltages_and_starter_batteries|below]]) when charging, just below the significant gassing point+  - a simple [[electrical:solar:charge_controller#shunt|shunt charge controller]] holds the starter battery at a medium Float voltage (13.2 - 13.8v, see notes [[electrical:solar:shallow_cycling#charging_voltages_and_starter_batteries|below]]) when charging, this is below the 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) 
-  - 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]]+  - 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]].  Since the load is disconnected below 12.7v the battery cannot be run down by loads. 
  
 === Low Voltage Reconnect (LVR) setpoint === === Low Voltage Reconnect (LVR) setpoint ===
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-==== components ==== 
  
-  * vehicle with starter battery 
-  * simple [[http://amzn.to/2z8Sd8Y|10A controller **with configurable setpoints**]].  The controller should be mounted in a location easy for easy access if the built-in USB ports are going to be used. 
-  * small solar panel; 25w-100W would be fine.  
-  * connector of some kind if panel is mounted off-vehicle 
-  * wiring from panel to controller and from controller to starter battery 
-  * [[http://amzn.to/2xHjBi7|usb/12v power outlet]].  An outlet with USB ports in it would allow the controller itself to be mounted discreetly and closer to the battery.   
  
  
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 This is the tricky part.  Shunts (or controllers set with [[electrical:12v:eternal_absorption|Vabs == Vfloat]]) have one charging voltage.  What should we use? This is the tricky part.  Shunts (or controllers set with [[electrical:12v:eternal_absorption|Vabs == Vfloat]]) have one charging voltage.  What should we use?
  
-  * folks who shallow cycle might charge to 14.4v to help counteract the cycling +  * folks who shallow cycle might charge to 14.4v to help counteract sulfation from overnight cycling. 
-  * folks who non-cycle might charge to 13.6v as if the battery is simply being maintained.  This leaves some power on the table (~8.5%) for non-MPPT controllers but may be easier on the battery. +  * folks who non-cycle might charge to 13.6v as if the battery is simply being maintained.  This leaves some power on the table (~8.5%) for non-MPPT controllers but may be easier on the battery. 
 + 
  
  
  
electrical/solar/shallow_cycling.txt · Last modified: 2023/04/08 13:41 by frater_secessus

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