Here is an essay https://thehonestsorcerer.substack.com/p/solar-panels-another-exercise-in I have come across covering things I thought you could find relatively easily on your own. If you’re motivated you can fact-check and use it as a point of departure for further reseach. If you’re really motivated I can recommend Tim Murphy’s textbook https://escholarship.org/uc/item/9js5291m
I could provide proof that your links have mistakes but you should do your own research. I think you can find them relatively easily on your own.
To get you started, compare these numbers which are sourced against your textbook.
You expect others to do research to come to your conclusions but won’t do research to come to others conclusions.
I even went out of my way to provide you a link that showed a mistake. What research did you do to prove yourself wrong?