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opinion:frater_secessus:lfprationality [2024/03/22 00:30]
frater_secessus [limiting current from the alternator] 		opinion:frater_secessus:lfprationality [2025/11/08 21:45] (current)
frater_secessus ["what you need is a Yeti mug"]
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 **Newbie:**  yeah, I heard if you don't use a Yeti mug your coffee maker will be damaged by brewing too much coffee!   \\ **Newbie:**  yeah, I heard if you don't use a Yeti mug your coffee maker will be damaged by brewing too much coffee!   \\
-**Me:** It is possible to brew too much coffee to put in //any// mug.+**Me:** It is possible to wear out a coffee maker no matter what kind of mug you use.  See the coffee maker's duty cycle specs for the product and stay within them. 
  
 **Yeti aficionado:** If you make a really big batch of coffee and don't have a 40oz Yeti to put it in you could spill some. \\ **Yeti aficionado:** If you make a really big batch of coffee and don't have a 40oz Yeti to put it in you could spill some. \\
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   * **theory** tells us that I=V/R.  This means that current will be the ([alternator voltage] - [resting voltage of the battery] / total resistance in the circuit.   We almost always know the voltage part but few know the resistance of their charging circuit.  After an observation we can back into that value.    * **theory** tells us that I=V/R.  This means that current will be the ([alternator voltage] - [resting voltage of the battery] / total resistance in the circuit.   We almost always know the voltage part but few know the resistance of their charging circuit.  After an observation we can back into that value. 
   * an **often-repeated (and wrong)** answer is 200A, because the BMS cuts off at 1C.    * an **often-repeated (and wrong)** answer is 200A, because the BMS cuts off at 1C. 
-  * **testing** tells us us(([[electrical:12v:directcharginglfp|article]])) +  * **testing** tells us(([[electrical:12v:directcharginglfp|article]])) 
     * current at middling states of charge averages ~0.2C, or 40A.     * current at middling states of charge averages ~0.2C, or 40A.
     * current at high states of charge((upper knee)) averages ~0.1C, or 20A.       * current at high states of charge((upper knee)) averages ~0.1C, or 20A.  
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 There is a good chance DC-DC will be required here to stay at our 50A continuous max.  But there is little harm in turning the key to take quick measurements since our wiring is fused at 75A.  If current is as high as predicted the fuse pops and we start thinking about a DC-DC.   There is a good chance DC-DC will be required here to stay at our 50A continuous max.  But there is little harm in turning the key to take quick measurements since our wiring is fused at 75A.  If current is as high as predicted the fuse pops and we start thinking about a DC-DC.  
  
-==== output specific charging voltage[s] ====+
  
  
opinion/frater_secessus/lfprationality.1711067401.txt.gz ยท Last modified: 2024/03/22 00:30 by frater_secessus

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