I can tell you one area in renewables that's NOT winning. Offshore. In the industry, there was some talk about how GE is pulling out of the offshore wind turbine market. Sucks to be wind farms that were built using those GE turbines.
Maybe I'm not the right audience for this as I came from a EE background, but I really do not see this as a good resource. I feel like the material from allaboutcircuits.com covers most of the material in this site up until chapter 11 or so and this site only has two volumes written out of 19 planned chapters.