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12v:bank-sizing [2023/05/17 13:47]
frater_secessus [battery bank chemistry]
12v:bank-sizing [2023/12/29 09:57] (current)
frater_secessus [charging] chargig
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 +DRAFT
 +
 ====== sizing a house battery bank ====== ====== sizing a house battery bank ======
  
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-Everything in this article assumes you have already assessed your [[electrical:12v:dailypowerrequirements|daily power requirements]] (DPR).  The article will stipulate a DPR of 1,000Wh (1kWh). This 1,000Wh will be the base of all our calculations below.   +  * Everything in this article assumes you have already assessed your [[electrical:12v:dailypowerrequirements|daily power requirements]] (DPR).  The article will stipulate a DPR of 1,000Wh (1kWh). This 1,000Wh will be the base of all our calculations below.   
- +  * We will think in terms of 12v systems and 100Ah batteries.   
-We will assume lithium = the common LiFePO4 and not any other form of lithium chemistry.+  We will assume lithium = the common LiFePO4 (12.8v)
  
  
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   * AGM 0.20C (20A for every 100Ah of capacity)   * AGM 0.20C (20A for every 100Ah of capacity)
  
-If we cannot meet minimums the bank should be downsized (or charging increased)+If we cannot meet minimums the bank should be downsized (or [[electrical:12v:alt_and_solar|charging increased]]).  
  
 Note:  Lithium has no minimum charging current Note:  Lithium has no minimum charging current
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   * LFP 1.0C (100A for every 100Ah of capacity)   * LFP 1.0C (100A for every 100Ah of capacity)
  
-If the alternator can only safely provide 50A of charging to the house bank this would limit us to a 166Ah AGM bank (166Ah x 0.33 = 50A).+If the alternator can only safely provide 50A of charging to the house bank this would limit us to a 166Ah AGM bank (166Ah x 0.33 = 50A). If the alternator has excess capacity then a larger bank can accept more current.  This doesn't mean the bank would get full any faster((it's larger, after all)) but you will gather more Ah/Wh on any given run
  
  
  
  
12v/bank-sizing.1684345648.txt.gz · Last modified: 2023/05/17 13:47 by frater_secessus