RV and vandwellers wiki

User Tools

Site Tools

Trace:
electrical:solar:shallow_cycling

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
Next revision Both sides next revision
electrical:solar:shallow_cycling [2020/07/08 15:48]
frater_secessus [staged charging] 		electrical:solar:shallow_cycling [2020/07/08 15:51]
frater_secessus [how it works]
Line 23: Line 23:
   - 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 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
   - 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 ===
Line 112: Line 112:
 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

Page Tools

Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International

affilliate disclosure

CC Attribution-Noncommercial-Share Alike 4.0 International Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki