Thinking out of the box, I wonder if the ocean could be turned into a giant battery somehow. Considering most population lives closer to the coasts, it would be

Thinking out of the box, I wonder if the ocean could be turned into a giant battery somehow. Considering most population lives closer to the coasts, it would be amazing if it was possible without any environmental harm. Not saying something like electrifying the oceans. But, something like power generation with Wind, solar or tidal energy, and store it in some kinetic form like Norway did with water up the mountain, and then transfer power upon need to the coastal cities.