Thing is, industries don't operate on "average energy". Neither do services and people's homes. They don't care if you have 100% energy tomorrow if today you get 0%. Yes, on average you will get 50%. But in practice you'll have complete disruption.
When the sun is down, it's down not just for a singe country or a city. When the wind is not blowing, it's not just a local phenomena for a single country/city. Etc.
> the actual number for PV is about 10%, and even given that capacity factor the world is currently on the path to that alone being sufficient by the early 2030s.
So, riddle me this: if you want to account for days when wind and electricity produce only 1-3% of their installed capacity, how much capacity (and storage) needs to be installed to provide full energy needs?
> That's like saying your car is "currently" only as fast as a bicycle
False analogy
> And if everyone running the grid were to say "we're not having a grid any more", Kaufland and Obi both sell kWh-range battery packs at low enough prices that, given the way they wear over use, they'll already be cheaper over their lifetime.
How many of those battery packs you will need for "no grid"?
> hence why it's not common, but it is already there.
Of course it's nowhere near "there", wherever there may be.
If you're doing that bad on average over the year, you put them in the wrong place.
Fortunately the actual number for PV is about 10%, and even given that capacity factor the world is currently on the path to that alone being sufficient by the early 2030s.
> no one knows how this problem will be solved (and if it can be solved)
It definitely can be solved.
Any of the things I listed, alone or in combination, are sufficient to solve it.
They're almost certainly not the only options, and I'd be surprised if lil' me can pick the best, but they all work.
> Currently the only reason is working is that countries burn copious amounts of coal and gas to keep up with demand.
"Currently".
That's like saying your car is "currently" only as fast as a bicycle while you're in a 20 zone and have yet to reach the autobahn, but then trying to use this fact to conclude cars are incapable of higher performance rather than just you've not done it yet.
And if everyone running the grid were to say "we're not having a grid any more", Kaufland and Obi both sell kWh-range battery packs at low enough prices that, given the way they wear over use, they'll already be cheaper over their lifetime. That lifetime is longer than most people care to invest for, hence why it's not common, but it is already there.