Solid info. Thanks for putting it together. A similar presentation including array config would bring value I believe. I'm not aware of such a thing. Are you? I've seen recently and have my self just experienced 120 VAC on the panel frames. Bit me twice hard. Most suggest to ground / earth to correct, but MPP solar specifically states no grounded arrays for the LV6548. I will reconfig my setup per this very awesome document and see if anything changes. but wanted to throw the array thing out there. Thanks Again!!