When they come to Europe (CH at least), Tesla's gonna eat up the lunch (in the ancillary services field at least) of everyone. Even more so with the new renewable capacity added every day.
AFAIK Switzerland in particular has exactly zero, thanks to all that lovely hydropower that can be turned on and off to match solar/wind fluctuations.
In fact, Switzerland alone has hydropower equivalent to 10 000 Megapacks. This basically means you can install all the renewables you want.
In France and Germany, nuclear reactors are configured and permitted to run in load following mode. It's harder on the valves and similar equipment, but it can and is done. [1]
> unless the renewables become incredibly overprovisioned.
Which is the likely outcome, as solar and wind are still declining in cost and in some places the cost is as low as 2 cents/kwh. The generation will be cheap (what's the old saying? "too cheap to meter"?), and it'll be the storage that'll cost a bit more.
[1] https://www.oecd-nea.org/nea-news/2011/29-2/nea-news-29-2-lo...