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And finally, as far as the reverse diodes, I don't see how I could prevent any of the strings/moduled partially or fully shaded from being seen as resistance by the other strings which are eventually connected in parallel.

I am building my first PV system and I have a question in my mind. I have noticed that most Combiner Boxes have the reverse protection diodes positioned after the individual fuses before the isolator and merging point (Bus Bar) however since I will have a smaller consumer box next to the...

Would it be better to add a BMS between the two different brands in parallel or would it be just a waste ? and, BTW, I don't seem to find an DC OCPD rated 100A. Thanks