[1] in fact, price is a terrible metric when talking about electricity because you can't (realistically) store it, even today. Price only make sense when you have a bunch of fossil fuel power plant sitting idle, waiting for the break-even price to happen before adding their power to the grid.
The storage problem is being solved, battery tech is hot and getting hotter (kinda pun intended).
The transmission problem is still being worked on - there are unconventional options for cheap, plentiful solar power, like extracting hydrogen from seawater and then shipping the hydrogen to power plants near where the power is needed.
The costs used to be prohibitive because the panels were so expensive. But the tech for solar panels has progressed hugely (and quickly) and this is no longer a factor.
Solar power plants will never be a drop-in replacement for fossil fuel plants, for the reasons you describe. But that doesn't mean we can't replace fossil fuel plants with an energy system that uses solar power for generation.
The same will happen with vat-grown meat. One by one the difficulties will be overcome and the commercial problems will be solved. What we end up with will probably not look anything like our current meat industry. But it will replace our current meat industry.
[0] apologies to the indigenous people who have "used" this land for tens of thousands of years and would probably disagree with this statement.
There'll be a series of incremental improvements, a couple of sudden "aha" shifts in thinking, and suddenly it's not only cost-effective, but massively better.
[0] searching for one now, I can't find an example, which is interesting. Did I mis-remember, or have they all been pulled down?