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food:refrigeration:power [2024/05/09 21:55]
frater_secessus [power and duty cycle] 		food:refrigeration:power [2024/05/09 21:57] (current)
frater_secessus [TL;DR]
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   * [[food:refrigeration#compressor_refrigeration|compressor fridges]] are a part-time load;  as a rule of thumb we can assume the compressor will be running 1/3rd of the time.   * [[food:refrigeration#compressor_refrigeration|compressor fridges]] are a part-time load;  as a rule of thumb we can assume the compressor will be running 1/3rd of the time.
   * they will consume a given number of Wh (Watt-hours) over a 24-hour period   * they will consume a given number of Wh (Watt-hours) over a 24-hour period
-  * you must have at least enough charging capacity to replace at least that amount of Wh+  * you must have at least enough charging capacity to replace those Wh
   * and have enough battery bank capacity to make it through periods where charging is absent   * and have enough battery bank capacity to make it through periods where charging is absent
  
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 60w x 0.33 duty cycle x 24 hours = **480Wh** required each day to run the fridge.  We will use the 480Wh example from here on, and assume this is the only load.  In real life the fridge will be only one part of your [[electrical:12v:dailypowerrequirements|daily power requirements]].  We also assume the fridge will be run off 12vdc.  If you are running it off an inverter then add ~20% to the Wh requirements to make up for inversion losses.   60w x 0.33 duty cycle x 24 hours = **480Wh** required each day to run the fridge.  We will use the 480Wh example from here on, and assume this is the only load.  In real life the fridge will be only one part of your [[electrical:12v:dailypowerrequirements|daily power requirements]].  We also assume the fridge will be run off 12vdc.  If you are running it off an inverter then add ~20% to the Wh requirements to make up for inversion losses.  
  
-==== why think about it 24hr terms? ==== 
  
- 
-* offgrid power consumption is often considered in terms of daily cycles 
-* solar power occurs in daily cycles 
-* overlanders and others who travel often (and for whom alternator charging is practical) think of driving in hours per day 
 ===== battery bank capacity ===== ===== battery bank capacity =====
  
food/refrigeration/power.1715291712.txt.gz ยท Last modified: 2024/05/09 21:55 by frater_secessus

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