Solar now being the cheapest energy source made its rounds on Lemmy some weeks ago, if I remember correctly. I just found this graphic and felt it was worth sharing independently.
There is this vision for the future, where people can use the battery in their electric car (or a separately bought battery) to store power, either produced by their own cheap solar or from the grid during over-production. And then some software could sell that energy back into the grid at night or during high demand.
If that becomes a reality, we might have it at least so that if a chunk of the grid gets cut off for a bit, it can actually tide that over.