I'm curious how those numbers are calculated. My brother works for a company that installs and supports operations for microgrids and renewable power generation

I'm curious how those numbers are calculated. My brother works for a company that installs and supports operations for microgrids and renewable power generation. At the moment, solar is slowing down, because private equity is turning to cobbling together quotes from residential installers as a bargaining tactic to get lower quotes from my brothers company. It's a profoundly bad idea, but if they can get something together and flip it to naive buyers in a few years, they can get away with it. All of that is to say, there's lots of bad cost estimation out there for commercial solar, and I know it'll happen sooner or later, but I'm still skeptical that solar+storage is going to beat carbon in the "sooner" range.