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electrical:12v:b2b [2020/06/23 12:20]
frater_secessus 		electrical:12v:b2b [2020/06/23 12:21]
frater_secessus [sizing]
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 Different battery types accept current at different rates.  Assuming a 100Ah battery: Different battery types accept current at different rates.  Assuming a 100Ah battery:
  
-* Flooded lead-acid accepts a maximum of about [[electrical:12v:battery_capacity|C]]/5, or 20A and requires a minimum of C/10 (10A).  In this case, **10-20A of charging capacity would be appropriate**.  Less than 10A would be insufficient and more than 20A would be wasted expense.  +  * Flooded lead-acid accepts a maximum of about [[electrical:12v:battery_capacity|C]]/5, or 20A and requires a minimum of C/10 (10A).  In this case, **10-20A of charging capacity would be appropriate**.  Less than 10A would be insufficient and more than 20A would be wasted expense.  
-* AGM lead-acid accepts a max of about C/3, or 33A per 100A of battery capacity, and requires a minimum of C/5 (20A).  In this case, **20-33A of charging capacity would be appropriate**.  Less than 20A would be insufficient and more than 33A would be wasted expense.  +  * AGM lead-acid accepts a max of about C/3, or 33A per 100A of battery capacity, and requires a minimum of C/5 (20A).  In this case, **20-33A of charging capacity would be appropriate**.  Less than 20A would be insufficient and more than 33A would be wasted expense.  
-* Lithium has very low internal resistance, and may be able to slurp up all the alternator has to give.  However, there are reasons not to max out charging capacity: +  * Lithium has very low internal resistance, and may be able to slurp up all the alternator has to give.  However, there are reasons not to max out charging capacity: 
-  * added expense +    * added expense 
-  * lithium does not care about [[electrical:12v:psoc|partial states of charge]] +    * lithium does not care about [[electrical:12v:psoc|partial states of charge]] 
-  * lithium tends to last longest with gentler charging/discharging +    * lithium tends to last longest with gentler charging/discharging 
-  * the alternator will be happier with lighter loading +    * the alternator will be happier with lighter loading 
-For these reasons, an appropriate charging capacity would be **as small as possible while still meeting your power needs**. +For these reasons, an appropriate charging capacity for lithium would be **as small as possible while still meeting your power needs**. 
  
  
electrical/12v/b2b.txt · Last modified: 2024/04/12 21:52 by frater_secessus

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