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opinion:frater_secessus:efficiency [2025/04/30 15:50]
frater_secessus created 		opinion:frater_secessus:efficiency [2025/04/30 15:57] (current)
frater_secessus ["Efficient"]
Line 7: Line 7:
  
   * //better//    * //better// 
-  * //makes more power// +  * //preferable// 
 +  * //makes more power// 
 +  * or, perhaps more cynically, //the thing I bought// 
  
-... both without describing the use case. +... without describing the use case. 
  
-It will simplify matters if we think of efficiency as ''power in / power out''.  If a component requires 220W in to make 200W out then it is ~90% efficient with ~10% losses.+It will simplify matters if we think of efficiency as ''power in / power out''.  Round numbers example:  if a component requires 220W in to make 200W out then it is ~90% efficient with ~10% lost, typically as heat.
  
 Made up examples: Made up examples:
  
-  * 200w inverter, 90% efficient+  * 200w inverter, 85% efficient
   * 1000w inverter, 80% efficient   * 1000w inverter, 80% efficient
  
-Which one can make more 120v power?   The 1000w one.  Which one is more efficient?  The 200w one.  +Which one can make more 120v power?   The 1000w one.  Which one is more //efficient//?  The 200w one.  
  
  
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 MPPT are not more //efficient// than PWM controllers.  MPPT have DC-DC conversion losses (typically ~5%) and PWM do not.   MPPT are not more //efficient// than PWM controllers.  MPPT have DC-DC conversion losses (typically ~5%) and PWM do not.  
  
-Will the MPPT make more power?  Yes, on average MPPT controllers will harvest ~13% more energy (Watt-hours) from sunlight than the same system on PWM.  But it incurs losses while doing so.  There are [[electrical:solar:charge_controller#when_pwm_beats_mppt|scenarios where PWM can harvest more power than MPPT]] because of MPPT's buck/boost losses.  +Will the MPPT harvest more in Bulk?  Yes, on average MPPT controllers will harvest ~13% more energy (Watt-hours) from sunlight than the same system on PWM.  But it incurs losses while doing so.  There are [[electrical:solar:charge_controller#when_pwm_beats_mppt|scenarios where PWM can harvest more power than MPPT]] because of MPPT's buck/boost losses.  
  
  
opinion/frater_secessus/efficiency.1746028210.txt.gz · Last modified: 2025/04/30 15:50 by frater_secessus

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