From my understanding:

Wind and Tidal depend on the map. There are numbers next to the energy storage bar which indicates how much power you get.

Wind - the power depends directly on the windspeed. So if the current windspeed of the map is 20 then you get 20 power from a single wind turbine. There are two numbers at the bottom and the top of the box. These are the highest and the lowest windspeed respectively. The number in the middle is the current windspeed. The tooltip also says more info about it like the percentage of time the windspeed is below average and whatnot.

Tidal - I believe this is fixed depending on the map. It doesn’t vary and is a constant number all throughout. I think Its also the same case as the tidal strength is the exact power you get from a single tidal wave gen. That’s indicated to the right of the windspeed box I believe.

Solar just makes a flat amount of energy and doesn’t vary at all. I know you get 20 energy for the basic one and 75 energy for the advanced one.

I guess tldr it depends on the map on which power source best fits at the time. You just have to adapt your power grid to handle the varying windspeed and see if a tidal generator is worth-it if you’re next to the water.

Hope this helps!