That's why we need tidal energy
Hydro, like solar (as the complaints being levelled at those solar installers is proving) is a break even to loss maker over it's lifetime, there is no "Free" electric
All power generation is subsidised, from Fossil to Wind
when the car manufacturers get together and decide on ONE battery type / shape/ tech it'll work a bit better....same as Apple and Samsung agreeing a port type
I wont wait for it!