From the Earth's own gravitational rotation. ...On axis.
There are many more methods...ocean wave generators positioned strategically along all the most turbulent world's coasts.
...New cells that can produce more current and last much longer, and regenerated from wind turbines installed in tornado alleys.
...More solar energy with larger panels installed everywhere where the sun is constantly shining...the most sunny days without clouds.
...Mirrors installed @ the surface of the oceans to capture the sun's energy from the ocean's reflections.
...From water condensation and clouds creation, then big cloud blowers to send them where they need rain water.
...From icebergs melting and refrigeration. ...Under water currents. ...Compos. ...Scrap metals, computers, glass, plastics, recycling garbage, rice, corn, salt , sodium, sulphur, hot springs, french fries, big macs, ...magnets, dynamos, human bodies heat, bicycling with efficient power cells to capture energy.
Someone is going to use one of my ideas and develop it further to make tons of cash. ...Just need few good investors and a solid plan.