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I am going to start my install on a metal roof(pro panel, mage bracket). I am looking for junction box ideas. I am shooting for something that will be under the array. My roof penetration will be with a Zillarac passthrough to 3/4 EMT conduit (...

Is it within "code" to connect a 10awg/12awg wire mc4 connector to a 8awg wire mc4 connector?

Impending install: 3 strings of 12 wired in series(36 total) to sonny boy 4000us inverter(3 in total). grid tied. I have minor shading on one string for two panels. My questions are: 1. Are there any optimizers that work independent of the inverter(solar edge IE.)? I just need the 2. 2...