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electrical:solar:output

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electrical:solar:output [2020/01/07 22:18]
frater_secessus [cleanliness] 		electrical:solar:output [2020/01/22 10:16]
frater_secessus [Table]
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 ====== Factors affecting solar panel output ====== ====== Factors affecting solar panel output ======
  
-For various reasons **it will be a rare event when your panels put out their full rated power**.  One reason for this is **the power needs somewhere to go**;  unless you are in [[electrical:12v:charging#bulk_stage|Bulk stage]] or have a big load on the system there is no point in making big power. +For various reasons **it will be a rare event when your panels put out their full rated power**.  One reason for this is **the power needs somewhere to go**;  unless you are in [[electrical:12v:charging#bulk_stage|Bulk stage]] or are running big loads you will not see the system making anything like it's capacity.  Even under perfect conditions. 
  
 The other big reason is that **power ratings are derived from testing under specific lab conditions**.  The standard lab test is at: The other big reason is that **power ratings are derived from testing under specific lab conditions**.  The standard lab test is at:
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 [[electrical:solar:charge_controller#mppt|MPPT]] controllers can run the panel at max output when needed, but are much more expensive.  [[electrical:solar:charge_controller#mppt|MPPT]] controllers can run the panel at max output when needed, but are much more expensive. 
  
 +===== wiring losses =====
 +
 +Long runs of wire between the panel and controller can result in losses that make the panel //appear// to be putting out less power.   In reality, the lost power has been converted to heat((from resistance)) in the wiring.  Solutions:
 +
 +  * use shorter runs
 +  * use thicker wire
 +  * prefer [[electrical:solar:panels#panel_voltage|higher voltage panels]]
 +  * if multiple panels, run them in serial instead of parallel to decrease carried current
  
 ===== panel temperature ===== ===== panel temperature =====
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-^**Temp in F**^**Temp in C**^**Temp derated power**^ +^ **Ambient temp in F**  ^ **Ambient temp in C**  ^ **derated power**  ^ 
-|32F|0.0C|97w| +| 32F                    | 0.0C                   | 97w                | 
-|40F|4.4C|95w|  +| 40F                    | 4.4C                   | 95w                | 
-|50F|10.C|92w|  +| 50F                    | 10.C                   | 92w                | 
-|60F|15.6C|90w|  +| 60F                    | 15.6C                  | 90w                | 
-|70F|21.1C|87w|  +| 70F                    | 21.1C                  | 87w                | 
-|80F|26.7C|84w|  +| 80F                    | 26.7C                  | 84w                | 
-|90F|32.2C|82w|  +| 90F                    | 32.2C                  | 82w                | 
-|100F|37.8C|79w|  +| 100F                   | 37.8C                  | 79w                | 
-|110F|43.3C|76w| +| 110F                   | 43.3C                  | 76w                |
  
  
electrical/solar/output.txt · Last modified: 2024/02/21 11:49 by frater_secessus

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