Forum Discussion
CA_Traveler
Apr 30, 2013Explorer III
A compelling case for how bypass diodes work or don’t work is indicated by the typical panel AV curves. They show full amps for 1000W/m sq and about 20% amps with 200W/m sq irradiance with no voltage difference. This means that as the light levels drop the amps drop and the bypass diodes are inactive.
It seems reasonable to me with certain types of filter light like some trees parallel panels which add amps may supply more power than serial panels which will be limited by the smallest amp panel unless very low light levels cause some bypass diodes to activate. Clearly there are different types of shadows like “soft light” vs. partial full shade like from an AC shadow.
The basic shadow differences come down to where the panels are mounted and where you park relative to shadows. If you have little shadow difference for parallel vs. serial then serial would involve less wire length, smaller gauge wire and no need for a combiner box.
For RVers who like trees (and who doesn’t) parallel panels may have an advantage but the best advantage would be portable panels mounted in full sun.
It seems reasonable to me with certain types of filter light like some trees parallel panels which add amps may supply more power than serial panels which will be limited by the smallest amp panel unless very low light levels cause some bypass diodes to activate. Clearly there are different types of shadows like “soft light” vs. partial full shade like from an AC shadow.
The basic shadow differences come down to where the panels are mounted and where you park relative to shadows. If you have little shadow difference for parallel vs. serial then serial would involve less wire length, smaller gauge wire and no need for a combiner box.
For RVers who like trees (and who doesn’t) parallel panels may have an advantage but the best advantage would be portable panels mounted in full sun.
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