Photovoltaic regulation due to incentives

In BW, the funding program for "grid-supportive storage systems" is being relaunched. I have just read through the funding conditions for the old program a bit and have a question about it. I had already started a thread in the subforum for construction costs/funding, but no one responded and the question is rather technical.

The funding conditions state the following:

The maximum power output of the photovoltaic system at the grid connection point is a) for photovoltaic systems with up to 30 kWp power 50 percent, b) for photovoltaic systems with more than 30 kWp power 60 percent of the installed power of the photovoltaic system. The obligation for power limitation exists permanently for the entire lifetime of the photovoltaic system, but at least for 20 years [...]. Photovoltaic systems [...] equipped with technical devices that fulfill the obligation according to § 9 paragraph 1 sentence 1 no. 1 or § 9 paragraph 1 sentence 2 no. 1 Renewable Energy Act (remote-controlled reduction of feed-in power by grid operators in case of grid overload) are exempt from the active power limitation [...]

That does not sound very economical to me. For a one-time payment of around €1000, I am only allowed to feed in half of the nominal power. Especially in summer, the yield is quite high and a base load in the house of several kW without air conditioning is rather unlikely. The battery is probably also fully charged from late morning.
The way out would be that the grid operator controls the feed-in reduction. How often does this happen, and is the feed-in reduction capability a standard component in inverters?

I am really not an expert in this. But how high is the subsidy? We have no subsidy, but it is only curtailed at 70%. We have 9.8 kWp.

200€ per kWh storage, so depending on the storage size approximately one thousand. To then feed in only half the nominal power for 20 years is a bit meager. On the other hand, I would have less of a problem if the grid operator reduces feed-in for one hour five times a year because there is wind and sun.

Make a soft curtailment. This way, the photovoltaic system can produce 100% and only reduces output when self-consumption is too low.
Are you planning/have a pool? Here, the excess power could be used with a heat pump to heat the water. Or air conditioning in the house, electric or hybrid car...
The problem is actually that in the season when the highest electricity demand occurs (heat pump in winter), almost no electricity is generated by the photovoltaic system.
How large do you plan the photovoltaic system?
Curtailment by the grid operator rarely occurs so far. Especially not with "small" private systems. Of course, this can change...
The ripple control receiver costs money, and if the grid operator switches you off, you have no production at all...

Neither pool nor air conditioning nor electric car. Consumption without heating is therefore not that huge. The exact size of the photovoltaic system has not yet been determined and will be somewhere in the range of 6-10 kWp. Half of that would be 3-5 kW, even with a deduction for the difference between nominal power and actual power, that is well above the base consumption. I think with a 50% derating we would continuously waste electricity in good weather.

Or storage large enough to last through the night. Of course, with low self-consumption it is always bad...