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electrical:12v:drop-in_lifepo4

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electrical:12v:drop-in_lifepo4 [2022/09/15 18:31]
frater_secessus [myth: lithium doesn't need absorption] 		electrical:12v:drop-in_lifepo4 [2022/11/05 12:11]
frater_secessus [myth: you must use DC-DC for alternator charging Li] daisy chain
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   * you already have an [[electrical:12v:alternator|isolator]] installed from a previous Pb bank.  Might as well see if it meets needs "for free".   * you already have an [[electrical:12v:alternator|isolator]] installed from a previous Pb bank.  Might as well see if it meets needs "for free".
-  * even if you have no isolator installed an isolator is much less expensive, costing as little as 1/10th the price of DC-DC. If after testing you do decide to go DC-DC you can carry the isolator as a backup. +  * even if you have no isolator installed an isolator is much less expensive, costing as little as 1/10th the price of DC-DC. If after testing you do decide to go DC-DC you can carry the isolator as a backup. Or daisy-chain the DC-DC behind it for units that use D+ rather than voltage triggering. 
   * an isolator is likely to charge with more current than smaller (~20A) DC-DC units during shorter drives.((On longer drives the DC-DC will be able to provide higher voltage than the alternator so its current will remain stable while isolator current drops with the voltage delta))     * an isolator is likely to charge with more current than smaller (~20A) DC-DC units during shorter drives.((On longer drives the DC-DC will be able to provide higher voltage than the alternator so its current will remain stable while isolator current drops with the voltage delta))  
   * you want to be able to [[electrical:12v:self-jumpstarting|self-jumpstart]]   * you want to be able to [[electrical:12v:self-jumpstarting|self-jumpstart]]
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 === but that Victron video! === === but that Victron video! ===
  
-Why would a manufacturer of pricey [[electrical:12v:b2b|DC-DC chargers]] want to publish [[https://www.youtube.com/watch?v=jgoIocPgOug|a video]] of an LFP pack smoking an alternator?((7:01))  And why would they turn comments off?  Oh, right.  +Why would a manufacturer of pricey [[electrical:12v:b2b|DC-DC chargers]] want to publish [[https://www.youtube.com/watch?v=jgoIocPgOug|a video]] of a big LFP pack smoking a car alternator?((7:01))  And why would they turn comments off?  Oh, right.  
  
 The setup: The setup:
electrical/12v/drop-in_lifepo4.txt · Last modified: 2024/04/12 23:02 by frater_secessus

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