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electrical:solar:shading [2024/11/08 16:17]
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 100: Line 100:
 ==== so users try different panel configurations ==== ==== so users try different panel configurations ====
  
-Let's start using both our panels+=== parallel === 
 + 
 + 
 +Let's start using both our panels in parallel
  
      #########      #########
Line 115: Line 118:
  
            
 +             =                 =   
 +    ################## ################## 
 +    
 +             =                 =   
 +    ################## ##################     
 +     
 +
 +if we have the same partial shading as before
 +
 +
 +     
 +             =                 =   
 +    ################## ##################
 +    
 +             =                 =   
 +    ################## ####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.  
 +
 +
 +
 +    
 +    
 +    
 +    
 ===== further reading ===== ===== further reading =====
  
electrical/solar/shading.1731100650.txt.gz · Last modified: 2024/11/08 16:17 by frater_secessus

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