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

What is your problem with the 2 minutes of work per year for the sales tax (exactly 2 numbers have to be entered)?

So to be fair, it’s actually 10 minutes per quarter for a little over five years. You first have to determine the numbers and then also find out where to enter them. That’s annoying, but doable. You can also share the compensation with your tax advisor, then you have even less to do with it.

Quarterly but only in the first year. After that, annually. (Possibly also monthly in the first year, it always depends on the tax office) The form does the calculation for me. It gives me the corresponding values directly. And finding out where to enter the numbers is done exactly once. After that, you know it. :p

Thank you, but my question "whether" I can do without... was not answered.

Yes, I did write that. No feed-in = off-grid system for self-consumption. ==> that is exactly what the OP wants, a system solely for self-consumption and no feed-in. That is an off-grid system.

So to be fair, it’s already 10 minutes per quarter for a bit more than five years.

At the beginning of the year you receive the billing from your electricity supplier or grid operator, which includes the installments plus VAT. With that you can actually report all the numbers at the beginning of the year. Then in the annual VAT return including self-consumption. It might not be 100% accurate, but it’s the usual procedure. I now have two systems. For number 1, monthly for three quarters of a year, then submitted annually. For number 2, quarterly for two years and then annually.

You have to first determine the numbers and then find out where to enter them. It’s annoying, but doable.

You do it once while learning how it works. Excel also helps. And then just update the numbers each time in Elster. Really no effort. Summary for the OP: - yes, it works without problems - pointless without storage - alternatively use a balcony power plant – better price/performance ratio and no stress with the tax office - no feed-in (off-grid system) or small business regulation = no VAT but also almost 20% higher acquisition costs

An off-grid system has no connection to the public power grid. I am very sure that the OP does not want that.

An off-grid system has no connection to the public power grid.

He doesn't want that either. No feed-in is the goal. And with that, the off-grid system is the simplest option. He didn't ask whether it makes sense ;).

Even though we have already given him the answer together...

But recommending him the most complicated and expensive option right away is not exactly nice. ;-)

Easier than building a real island is to tell the WR not to feed in anything. But that would be antisocial.

Better is simply to feed in and waive the remuneration. Less effort than the other two options and you still do something for humanity.