They were trying a thing in Germany where they store the extra energy in the electric vehicles plugged in. Not sure what came of that.
I see that Tesla makes energy "walls" too. I don't think we have enough lithium in this world to ever keep a city going let alone the world. They were looking at a type of sodium that holds its heat very well while giving off tons of ambient heat that could be used to run turbines. The benefit of this being that they could heat the sodium indefinitely, there's enough in the world to heat the "heat retention furnaces" for every city, every day. It's complex because there are disconnects between the mirror farms that all focus their energy on a central spot that shoots right into the furnace and heats it to ludicrous temperatures. Everything changes with clouds blah blah blah.
No matter what happens, unless we keep building gas turbines, we're going to need to build a much wider power grid in each of the northern continents with the power flowing from the deserts all the way north. That or we make wind work. Places on the ocean coast could use water currents on underwater turbines. Quebec and Ontario water power is limited. There's only so many places you can flood so you can make dams/turbines/spillways.
Obviously nuclear is toxic in everyone's minds (ha ha see what I did there?) but maybe they need to start pushing it again. We take a hefty 35% of our power from nuclear from just three plants in Ontario with 30-50 year old reactors. Surely somebody has made a better version of a Candu reactor in all this time? I love nuclear. It leaves a mess but it's limited. Shit runs day or night, clouds or not, sun, rain, windy or not. No matter what, nuclear always runs. A terrible concern for terrorism but we have to start making hard decisions. Keep flogging wind like an erection that won't stay hard enough for us to keep ejaculating or do we go back to what's kept Ontario running for decades and won't be going ANYWHERE for decades to come. The last time we had anything near a major earthquake was close to being before the indigenous people were here. The nuclear plants just keep spinning out energy.