Differences

This shows you the differences between two versions of the page.

--- electrical:solar:shading [2020/03/17 16:22]
frater_secessus [panel configuration for partial shade]
+++ electrical:solar:shading [2020/03/17 16:25]
frater_secessus [reminder: how panels work]
@@ Line 8: / Line 8: @@
-**Before we begin:** solar panels are "current sour
+**Before we begin:** solar panels are "current sources";  their voltage pops up into the normal range in any kind of meaningful light(>= 20% [[electrical:solar:output|insolation]]) but current will suffer.
-ces";  their voltage pops up into the normal range in any kind of meaningful light(>= 20% [[electrical:solar:output|insolation]]) but current will suffer.
 Partial shading in this context means:
@@ Line 15: / Line 14: @@
   * but not evenly on the panel -- it is different on some cells
-To prevent power from rushing into the shaded cells panels have bypass diodes.  Basically the shaded panels get cut off, electrically speaking, to protect them.
+To prevent power from rushing into the shaded string and overheating them, panels have bypass diodes between the strings.  Basically the shaded strings get cut off, electrically speaking, to protect them. In a perfect world each cell would be protect by a lossless, costless diode but that's not possible yet.  :-)

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