Hydroelectric schemes?

Put in a dam. Water is trapped behind it. Let the water go through a turbine/generator and the falling water will turn its Gravitational Potential Energy ( Height energy ) into electrical energy.

The height energy comes from the rain that has been dropped from the clouds onto high land. The rain got up high by gaining heat energy from the Sun. So hydroelectric energy is just a form of solar energy.

Build a dam across a river mouth. As the tide rushes up river it will drive turbines and produce some electric energy. Close the dam opening and trap the tidal water behind the dam. When the tide goes out, let the trapped water go and get another burst of electric energy as the water pushes past the turbines . This energy comes from the tides which are powered by the Earth's rotation.

Pumped storage doesn't take energy. It just uses it when you need it. You need a high level dam which lets its water run through turbines ( getting the electric energy you want ) into a low level dam. Then , when you don't need much energy, use surplus wind ( or other ) electricity to drive the turbines in reverse and send the water back up to the high dam, where the water can wait till you need its trapped energy again. Very handy if you have times of the day when you have surplus energy that would otherwise go to waste. But very extravagant on space....uses up a lot of land in having high and low lakes.