Planned throttling of wallboxes and heat pumps

If you have a second meter for the heat pump, it can be turned off during peak times.

The shutdown already exists in reality today

That's how it looks. We have the heat pump on a second meter with a cheaper heat pump tariff (16 cents).
We have power cut off 3 times a day: once for 30 minutes in the morning, once for 60 minutes at noon, and once for 30 minutes in the afternoon.

The problem is actually the power grids. Not even the electricity itself. But the power cables can only deliver a limited amount of current.

It will not work. In recent years, we have indeed dug up almost every city and every village in Germany to lay fiber optic cables. Laying new and more powerful power cables at the same time was neglected. Effectiveness and forward-looking planning are simply not the strengths of the German state.

And so they will probably plan for 20 years and then install more highly rated power cables for 20 years.

It will be difficult anyway, since many raw materials like copper and aluminum were delivered by the class enemy, and that one is so evil now.

If we now look at a new housing development. The main cable and the distribution to the individual houses are not up to the power demand. Especially there, there are mostly heat pumps and many electric cars. If every household there draws 20 kW and there are, for my part, 30 or more households, then it simply does not work because it was never intended to.

It does make a difference whether I heat my apartment building in winter with 50 kW of electricity or with 50 kW of oil or gas. So whoever wants to electrify heat generation and mobility at the same time must also ensure that it technically works. Because exactly that is not the case.

They failed to lay new and more powerful power cables there at the same time.

How do you come to the conclusion that the problems are with the "power cable networks"? So far, I've only heard about the transformer stations. Well, and the sufficient availability of electricity, but the cables on site? Especially in the past, much was designed for storage heaters, instantaneous water heaters, and the like.

If we now look at such a new development area. The main cable and the distribution to the individual houses cannot meet the power demand. Especially there, there are almost only heat pumps and also many electric cars. If every household there draws 20 kW and there are, for example, 30 or more households, then it simply doesn't work, because it was never intended for that.

Then it’s great that you can soon throttle down to 3kW if necessary! :)

It does make a difference whether I heat my apartment building in winter with 50 kW electricity or with 50 kW oil or gas. So anyone who wants to electrify both heat generation and mobility at the same time has to ensure that it technically works. Because exactly that does not work.

If you do it right, it works. From 50 kW oil or gas, due to insulation, it first becomes 25 kW, and with the heat pump with a factor of 4, only 6 kW. So, no problem at all. You just must not miss making the technology controllable. I find it a shame how many wall boxes were subsidized and installed for a lot of money without any benefit for the public. There, regulation options or public usage should have been prescribed right away.

Our electrician just refused to install a small meter cabinet with only one meter slot at our place. His argument: the obligation to throttle will come soon, and he will have to come back and modify it again. To save us the costs, he installed a larger distribution cabinet, even though (for now) with only one meter.

For now, the shutdown is compensated by cheap tariffs. Soon, it will not be anymore...

the obligation to throttle will come shortly and for that he will have to come again and rebuild.

Hardly. Technically and spatially not always feasible.

I rather think that intelligent measuring devices will become standard, allowing for time-based tariffs.
It actually doesn't make sense to specifically subsidize electricity for cars or heat pumps.
Basically, the aim is to encourage consuming less at certain times, i.e. when availability is low, and it should be completely irrelevant what kind of consumer it is.

It doesn't really make sense to specifically subsidize electricity for cars or heat pumps.

Not when viewed in isolation. But if you have CO2 targets for each sector and consider electricity from the socket as CO2-free, then it does.