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I was told today by a friend who sells solar for a solar installation company that my planned system was "illegal" in Utah: all numbers are approximate. 4,000 W of Solar Panels mounted on roof of house MPP LV5048 "all in one" mounted in the attached garage and plugged in to the grid. 2,000 W...

I recently bought some used panels: 345W, 43V VOC, with MC4 connectors hard wired to each panel. I tried to use a volt meter, but can't poke the probes into the MC4's far enough to get a reading. I have an old 10A PWM Charge Controller, along with an old FLA battery. Should I just plug each...