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--- electrical:solar:shading [2024/11/08 16:20]
frater_secessus [so users try different panel configurations]
+++ electrical:solar:shading [2025/05/31 15:56] (current)
frater_secessus [augment with unshaded solar]
@@ Line 73: / Line 73: @@
     ################## ##################
-...where the equal sign (=) is a bypass path when needed to prevent damage.
+...where the equal sign ("=") is a bypass path when needed to prevent damage.
@@ Line 119: / Line 119: @@
              =                 =
     ################## ##################
              =                 =
     ################## ##################
+if we have the same partial shading as before
-=== series ===
+             =                 =
+    ################## ##################
+             =                 =
+    ################## ####0###00########
+To prevent voltage backing up into a panel from a neighboring panel (or battery bank at night) each //panel// typically has a //blocking diode//. So the complete picture is:
+             =                 =
+    ################## ################## =
+             =                 =
+    ################## ####0###00######## =
+Note:  in most panels the blocking and bypass diodes are identical parts, just installed in different places, in different orientations, and for different purposes.
+=== series ===
+             =                 =                   =                  =
+    ################## ################## = ################## ####0###00######## =
+===== but I have to park in the shade =====
+Then solar probably isn't the best choice as sole (or even main) [[electrical:12v:power_mix|source of charging]].  But if that's situation we are in there are some approaches that might help you limp through.
+The strategies below will work better with [[electrical:12v:drop-in_lifepo4|LiFePO4]] than lead since LFP does not suffer from [[electrical:12v:psoc|partial states of charge]].
+==== careful site selection ====
+If you are hiding in shade because of heat you may find a spot where you get full sun until it warms up then shade in the afternoon.  You might collect enough power during that time to make it to the next morning. [[electrical:solar:rationing|Reduce demand]] as needed.
+See [[opinion:frater_secessus:successful_boondocking#sun|this related subarticle]].
+==== augment with unshaded solar ====
+Running portable panels that you can set up in forest openings (long extensions).  These would go on a separate controller.  Their controller allowing, the portables would benefit from  series wiring to [[electrical:12v:voltage_sag|reduce current on the long extensions]].
+==== augment with other forms of charging ====
+It might be easier, cheaper (or just necessary) to add in [[electrical:12v:power_mix|another form of charging]].
+  * [[electrical:12v:alternator|Alternator charging]] might fill the gap for campers who drive to town fairly frequently.  This is a scenario where [[electrical:12v:b2b|DC-DC charging]] might be preferable.
+  * one might run [[electrical:generator|a fuel-powered genny]] as needed to charge the bank.
+  * with [[electrical:autonomy|enough bank capacity]] one might rent a campsite with [[electrical:shore_power|power pedestal]] for periodic recharging and use the hobbled solar to "slow the bleeding" in between.

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