Yes there is an increasing problem with matching local (north) excess wind power and a potential market for it in the south.
But that doesn't mean the same isn't going to happen with solar, luckily PV is spread out all over but weather can over a few hundred kms be quite different.
The connection of PV to the grid is also regulated via the Voltage, regulations allow a fluctuation of 10%, as soon as that 255V barrier is reached the PV plant has to throttle or even switch of.

That's one reason I've put in bigger wires for my own, to keep the Voltage as low as practically possible and continue output for the maximum.
For me it's only a 50mtrs stretch (x2!) but I already gain some 5 Volts, for the power company with kilometers to the next transformer it is standard proper engineering practice.

Looks like you don't understand the concept of a meter that runs -backward-.

Join a co-op, buy or rent some space and install a large PV plant, share the returns.

Now make sure your internal walls are stone or concrete and can store the coolness, have a significant insulation (12 inches) on the outside and the house will stay cool all night.

Yep get off the grid :)
Then, to increase reliability you lay (string in the US) some lines to your neighbours and don't have a problem if one of your generators or batteries is out for maintenance.
Oh wait, that starts sounding like a grid...

True, HVDC is not automatically bi-directional.
But the systems I know are by design, at times of excess wind or solar output power goes from The Netherlands, Germany and Denmark to pump up storage in Norway and at times of demand it is returned.

Any utility that builds such a system one way deserves to fail.

You are totally correct, a solution is already available.
Of course we can still work on better solutions and that would be a large intercontinental grid and storage.

Myself I'm looking at adding an electric heating element to my gas fired water heater and when available use excess solar power.

I think the OP was from Germany, let's say N-W Europe.

That part of the world has a very high standard of reliability for their power grid, things like a UPS are al but unknown.
Another big factor is that except for the large trunk lines everything is underground making it far more reliable than the US system of stringing wires to dead trees.

http://energytransition.de/201...

There is a problem in Germany and on different fronts they work on it.
One is to build a larger backbone of transmission lines but that's seriously delayed by lot's of NIMBY's.
The other is to build more (expensive) gas turbines that can be started up in minutes if not seconds if demand needs it.

An important measure is to regulate the inverters that sit between the PV panels and the net, they will automatically cut off when the Voltage get's too high and in future they will be centrally controlled.
Domestic smart meters are already being rolled out for years and they also help utilities to monitor and control generation and distribution.

Around here we have 230Volt mains, the inverters from the solar panels have a cut off at 255V (230 +/- 10%), so if the Voltage gets any higher they'll switch off.
A next and simple step would be that it's a gradual down-turning of the output, say 100% output below 245V, 50% at 250V or even more finely regulated.

Such control is already in place for the large PV plants, it's only a matter of time until the domestic ones are going to be part of such a system.

Sure it costs.

But such systems are already existing on large plants
I was recently shopping around for PV panels and found out Germany requires a controller for domestic use to have an interface for a future monitoring and controlling system.

In Europe the generator and distributor are already separate entities and it's the generator that has to pay x cents per KWh for transport.

I really don't understand what worries you, over here the lines do belong to a separate company and I can shop around for a supplier of electricity
Exactly the same as with internet or telephone, many providers to choose from, one utility that does the delivery.

I pay one bill that has the KWh's and transmission as separate items, transmission is then paid by the electric supplier/provider to the cable company, it's not my worry at all.

Oh yeah, surprise, there's a third item on that bill, taxes ):

Uhh, the Germans are very clear about the horrendous mistakes they made leading up and during WWII.

For a nation in denial you should have a look at the Japanese...

Ah the days when umacs was the editor of choice, a large HD was a full 10MB and backing up required 70 floppies.