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electrical:12v:lvd [2021/10/04 12:29]
frater_secessus [Low Voltage Disconnect (LVD)] 		electrical:12v:lvd [2024/11/04 11:02] (current)
frater_secessus [challenges] added yt video
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 A low voltage disconnect is used to stop loads from dragging a battery bank below a given voltage (Vlvd). A low voltage disconnect is used to stop loads from dragging a battery bank below a given voltage (Vlvd).
  
-In theory the simplest way to implement an LVD would be to wire all loads go through the [[electrical:solar:charge_controller#using_load_output|LOAD output]] of the charge controller, and set the controller's Vlvd.  In practice this is rarely done for reasons given in the link above.  It is more common to run a [[electrical:12v:relay|relay]] on the LOAD output, which is triggered ON/OFF by the LVD setting.((the LOAD triggers the relay, but actual power comes from the battery bank))  + 
 +===== examples ===== 
 + 
 +[[https://amzn.to/3Ri94RY|{{ https://m.media-amazon.com/images/I/51ODnDvz-rL._AC_UL400_.jpg?125}}]] 
 + 
 +  * [[https://amzn.to/3Ri94RY|Victron Battery Protect]] 
 +  * [[https://amzn.to/47Xzz5n|Blue Sea 7635 m-LVD]] 
 +  * [[https://www.amazon.com/s?k=low+voltage+disconnect&link_code=qs&tag=themousepad|various amazon listings]] 
 + 
 +One can also **DIY a low voltage disconnect**.   
 + 
 +In theory the simplest way to implement an LVD would be to wire all loads go through the [[electrical:solar:charge_controller#using_load_output|LOAD output]] of the charge controller, and set the controller's [[electrical:solar:charge_controller_setpoints|Vlvd]].  In practice this is rarely done for reasons given in the link above.  It is more common to run a [[electrical:12v:relay|relay]] on the LOAD output, which is triggered ON/OFF by the LVD setting: 
 + 
 +controller LOAD output -> relay -> loads((the LOAD triggers the relay, but actual power comes from the battery bank))  
  
 If the controller has no LVD (or not no LOAD output at all) you can use a   [[https://amzn.to/3m2OTp3|stand-alone LVD]] powered by the battery.  If the controller has no LVD (or not no LOAD output at all) you can use a   [[https://amzn.to/3m2OTp3|stand-alone LVD]] powered by the battery. 
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 Observe and adjust based on your experience with your own system.   Observe and adjust based on your experience with your own system.  
 +
 +===== further reading =====
 +
 +  * [[https://www.youtube.com/watch?v=cFUcXOznENQ|quick demonstration]] of a generic LVD
  
electrical/12v/lvd.1633364950.txt.gz · Last modified: 2021/10/04 12:29 by frater_secessus

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