>> I'm trying to visualize how that would balance voltage without  
>> draining the caps at the same time. I've been wanting to do  
>> something like this with cheap 2.5v super caps for higher (not  
>> hundreds) voltage solar applications.


The supercap vendors tend to have app notes discussing this sort of  
thing.  For example:

http://www.cooperbussmann.com/pdf/35f489ea-89f2-4089-bbe3-9432cd21f9be.pdf

BillW

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