Iām not sure of the other two provinces mentioned, but in Ontario we pay artificially low rates for hydro (aka electricity) because the rates are subsidized.
I always thought it to be a ridiculous policy; show people the true cost of their usage and stop hiding taxes all over the place for everyone to make up the difference.
You can brag about low rates via monopoly, but someone else might be paying for em
As best I can tell[1], BCHydro isn't subsidized, unless you count the land usage grants from the province (but the water flow stability is useful for irrigation, so it has other benefits)