Interesting. Aren't there people on here who are totally off grid with solar? Also, some parts of the article talk about zero output, while others talk about 75% output. That's a pretty large difference.
I'm one of those people who's been offgrid with solar for eight years. One of my neighbors has been offgrid for 20+yrs. Had our solar panels performed as suggested by this article, our wives would have been gone along time ago.