Batteries don't make energy. They are just energy storage devices.
A cheaper, easier to manufacture energy storage device is a gas tank.
Batteries allow renewable energy to be portable. You’ve been conditioned for (if you’re old enough) six decades to see solar energy as a sh!+storm waste, because of starry-eyed doomsayers telling you it’s the way to go before it was economically feasible. But the price of solar energy has been dropping for decades.
It’s as if someone told you in 1970 that they have the world’s greatest phone-camera-gaming device... except it requires 16 GB of memory.