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electrical:solar:shallow_cycling

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electrical:solar:shallow_cycling [2018/01/27 02:13]
frater_secessus [microsolar without deep-cycle batteries] 		electrical:solar:shallow_cycling [2018/03/02 09:47]
frater_secessus [how it works]
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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 gassing point+  - 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
   - 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; 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 the intended setpoint
  
 === Low Voltage Reconnect (LVR) setpoint === === Low Voltage Reconnect (LVR) setpoint ===
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 If **running larger loads** (fans, laptop chargers) the setpoint should be set higher (like 13.5v - 14.0v).  This is because the panel will be able to make more power closer to Vmp.  Consider the popular [[http://amzn.to/2you3Kj|Renogy 100w panel]] that puts out about 5.29A.  At the lower LVR the panel((under lab conditions)) will make **68.77W**.  At the higher LVRs the panel will make **71.42-74.06W** If **running larger loads** (fans, laptop chargers) the setpoint should be set higher (like 13.5v - 14.0v).  This is because the panel will be able to make more power closer to Vmp.  Consider the popular [[http://amzn.to/2you3Kj|Renogy 100w panel]] that puts out about 5.29A.  At the lower LVR the panel((under lab conditions)) will make **68.77W**.  At the higher LVRs the panel will make **71.42-74.06W**
  
-Note:  running a small MPPT [[electrical:solar:charge_controller|charge controller]] would make this immaterial, as the controller would run the panel at max power (Vmp) at 18.9v.+Note:  running a small [[electrical:solar:charge_controller#mppt|MPPT]] [[electrical:solar:charge_controller|charge controller]] would make this immaterial, as the controller would run the panel at max power (Vmp) at 18.9v.
  
  
electrical/solar/shallow_cycling.txt ยท Last modified: 2023/04/08 13:41 by frater_secessus

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