Waiving feed-in tariff, always feasible? Storage price?

I did write above. Charging an e-car. There are certainly other major consumers as well. Once I finally have my computer running again, it also draws several hundred watts, at least when I'm gaming. Maybe we still want to get an air conditioner, it also consumes quite a bit continuously. And you could set one up in every direction to have some more consistent free electricity throughout the day...

The only thing I miss is the point of operating several of them. ONE balcony power plant nicely covers the baseline noise from the refrigerator and other technology, etc. But every additional balcony power plant feeds in, unpaid because registration-free.

Well, just don’t always assume blue skies and sunshine. One or two more modules might be "too much" in perfect weather but maybe just enough in cloudy weather to still cover the baseline noise. You have to calculate what makes more sense. It might not even be so dumb to feed in for free on the few top weather days and then, by contrast, produce just enough photovoltaic power on the quite frequent cloudy days we have.

A few rules of thumb for beginners:

[*]In cloudy conditions, 30% of the maximum output is still achieved.
[*]In rainy weather and on cloudy winter days, only 10%.
[*]It is very often cloudy - you only notice this when you look at the photovoltaic app...
[*]Electric cars start charging at 1.6 kW (inefficient).
[*]Average heat pumps draw between 200 and 2000 watts.
[*]More than half of what is possible with the given weather is usually produced between 10 a.m. and 4 p.m.
[*]Very often less power is produced than expected; in the mornings and evenings you always wish for more.
[*]One year after commissioning, you regret not having built bigger right away.
[*]Photovoltaics is addictive.

A few rules of thumb for beginners:

[*]With cloud cover, about 30% of the maximum power is still available.
[*]In rainy weather and on cloudy winter days, still about 10%.
[*]It is very often cloudy – you only realize this when you look at the photovoltaic app…
[*]Electric cars start charging at 1.6 kW (inefficient).
[*]Average heat pumps draw between 200 and 2000 watts.
[*]More than half of what is possible with the given weather is delivered by systems on average between 10 a.m. and 4 p.m.
[*]Quite often, there is less output than you expect; especially in the mornings and evenings you usually wish for more.
[*]One year after commissioning, you regret not having built bigger right away.
[*]Photovoltaics are addictive.

I add:
- The stove quickly draws between 1000 and 2000 watts
- The dryer quickly draws between 1000 and 2000 watts

We have 395 watt modules with a total of almost 10 kWp capacity. In the morning we linger around 600 watts, even though the sun is almost blazing down on it. During the day, then 6000–8000 watts pound into the grid, in the evening quickly back down to about 600 watts. These are our figures with current sunny weather and southeast orientation.
During the day the washing machine and dryer run. When the stove is added, electricity becomes tight. The house has a base load of about 400 watts.
How it will run in winter or even with clouds, you can imagine. As says: you regret having built so small.

Thank you for your numerous responses! So, to summarize: I can voluntarily waive the feed-in tariff. I assume I report this to the municipal utilities. Then I give away my surplus. Do you have an opinion on: storing surplus in a battery or cloud? There are different opinions on that.... I find the idea of the cloud very attractive. But I am an absolute layman in this field.

Storage has already been clarified, it is currently economically and ecologically nonsensical. You have to be willing to afford it, but you can do it.

And the "Cloud" exists only in marketing. In reality, these are simply electricity supply contracts that aim only to sell EVEN more expensive storage to customers and to obscure the true costs. Many benefit from these offers, just not the customer.

So twice no, if money still matters.