The fantasy is storage: I have a small p.v. with lithium storage
just as a protection against blackouts (AC coupled solar inverter to keep it on in case of no national grid frequency presence), in around a year battery capacity is already dropped to 99% and I do not allow more than 10% discharge since it's small, just enough for VMC + fridges/freezer + lights and computers, no main heating/cooling, cooking, washing machine etc from battery, except during sunny days eventually.
Synthetic fuels are not new, we have used them in WWII and probably earlier, they work but we simply can't produce enough of them in any sauce to power a generic usage. So no, so far the sole storage we have is classic mountain hydro witch is VERY good, only it demand waters and mounting, not that rare but definitively not everywhere.
Nuclear produce constant power witch is the perfect match for industry, that's the real main point, similarly low-enriched uranium (like French subs) is very usable on ships, we still miss the more important logistic mean: airplanes, but we can cover theoretically industry and rails and ships from nuclear witch is enough to add renewables locally just for resilience (not much sure if they are worth the investments, due to real energy price with a public nuclear but...). The anti-nuclear movement have a reason: it's not good for private profit and they (neoliberals) know that very well so they hate it.