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electrical:12v:alternator [2024/04/26 16:57]
frater_secessus [fuel consumption] 		electrical:12v:alternator [2024/04/26 16:59]
frater_secessus [heat]
Line 113: Line 113:
  
 See [[electrical:12v:alternator_details#heat|this sub-article]] on alternators and heat See [[electrical:12v:alternator_details#heat|this sub-article]] on alternators and heat
-==== charging current patterns ====+ 
 + 
 +==== alternator current rating ==== 
 + 
 +In general, vehicles with higher-rated alternators (150A, for example) will handle a given load better than vehicles with lower-rated alternators (60A, for example).  The rating in Amps will be listed on the window sticker, often on the alternator housing itself, or can be looked up using a VIN decoder for your automaker.   
 + 
 +see [[electrical:12v:alternator_details#current|this related article]] on assessing how much current you can safely take from the alternator 
 + 
 + 
 +==== fuel consumption ==== 
 + 
 +Fuel consumption for power generation will be greatest when the vehicle is idled.  When charging loads are imposed on a vehicle that is already driving the added cost can be minimal. 
 + 
 +Using the 3.6L [[rv:ram_promaster|Promaster]] with a 40A [[electrical:12v:b2b|DC-DC charger]] as an example, ObvB estimates: 
 + 
 +>> In terms of cost, an average USA price of gas at $3.36, **idling** for 2 hours to produce 1kWh with a 40A DC-DC charger would burn 2 * (2/3 + 0.074) gal = 1.48 gal = **$4.97 / kWh**. If you were going to be **driving** anyway, then the additional cost of turning on a DC-DC charger (using my assumptions) would be about **50c/kWh**.((https://www.promasterforum.com/threads/fuel-consumption-at-idle.103939/post-841876))  
 + 
 + 
 + 
 +===== charging current patterns =====
  
   * charging lead chemistries directly from the alternator tends toward    * charging lead chemistries directly from the alternator tends toward 
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 ''23A x 20 minutes / 60 minutes in an hour = 7.666666667Ah'' ''23A x 20 minutes / 60 minutes in an hour = 7.666666667Ah''
  
- 
-==== alternator current rating ==== 
- 
-In general, vehicles with higher-rated alternators (150A, for example) will handle a given load better than vehicles with lower-rated alternators (60A, for example).  The rating in Amps will be listed on the window sticker, often on the alternator housing itself, or can be looked up using a VIN decoder for your automaker.   
- 
-see [[electrical:12v:alternator_details#current|this related article]] on assessing how much current you can safely take from the alternator 
  
  
electrical/12v/alternator.txt · Last modified: 2024/06/13 11:53 by frater_secessus

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