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--- electrical:solar:output [2020/01/22 10:10]
frater_secessus [Factors affecting solar panel output]
+++ electrical:solar:output [2020/03/17 16:08]
frater_secessus [shade]
@@ Line 14: / Line 14: @@
 [[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 =====
@@ Line 22: / Line 30: @@
-^**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                |
@@ Line 93: / Line 101: @@
 ===== shade =====
-Partial shade in good sun can have a drastic effect on panel output.  This is because panels are made of strings of individual solar cells;  having some strings turned "on" and some "off" (to prevent reversing current //into// the shaded cells) can result in dramatic power reduction.
+[[electrical:solar:shading|Partial shade]] in good sun can have a drastic effect on panel output.  This is because panels are made of strings of individual solar cells;  having some strings turned "on" and some "off" (to prevent reversing current //into// the shaded cells) can result in dramatic power reduction.

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