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electrical:converter [2020/07/22 14:52]
frater_secessus [DIY dumb converters] 		electrical:converter [2021/05/31 12:45]
frater_secessus [charging the house battery]
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 ===== charging the house battery ===== ===== charging the house battery =====
-OEM converters are notoriously cheap and dumb (lacking [[electrical:12v:charging|smart charging]] functions).  Since they are stuck at one voltage the manufacturer picks a compromise setpoint.  If this is set too high or too low //for your usage patterns// it can damage lead-acid batteries ([[electrical:batterycide|batterycide]]).+OEM converters are notoriously cheap and dumb((single-stage)) (lacking [[electrical:12v:charging|smart charging]] functions).   
 + 
 +Note:  if you have sufficient solar to complete Absorption then a "dumb" converter can work fine and shore power will support the battery on subsequent days.  In this model the converter + solar would contribute up to [[electrical:solar:charge_controller_setpoints|Vfloat]], then solar would raise the bank to Vabs and fall back to Vfloat when Absorption is done.  Shore power holds Vfloat indefinitely thereafter.  
 + 
 +Some single-stage converters allow the user to configure the float voltage, typically somewhere between 13.2v - 13.8v.  If the converter does not allow this adjustment then pick one with an appropriate float voltage ([[electrical:solar:charge_controller_setpoints|Vfloat]]) for your battery bank.   
 + 
 + 
  
-This compromise setpoint should coincide with standard float voltage (Vfloat) for your battery bank.  Typically this would be 13.2v - 13.4v for converters that are always on the grid, and 13.8v for batteries that are cycled but get put back on grid charging regularly.((Solar charging at a single setpoint, as with a [[electrical:solar:charge_controller&#shunt|shunt controller]], is done at [[electrical:solar:shunt_tweaking|Vabs rather than Vfloat]].))  
  
  
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   * secondary use of charge controller as a spare if needed   * secondary use of charge controller as a spare if needed
  
-If you do not need smart charging an adjustable voltage power supply could do the trick.  Since by definition the batteries aren't cycling when on shore power you could adjust it to something like 13.2v and let it "float" charge over time. +
electrical/converter.txt · Last modified: 2024/02/28 15:19 by frater_secessus

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