Construction costs are currently skyrocketing

Well, I did write that the labor market in the USA is booming… more than twice as many jobs created as expected.

However, we are in Germany. Therefore, this has little relevance. Especially not on construction interest rates.

It's clearly a simple calculation If I make a rough estimate: 5kwh charging per day x 365 = 1825 kwh savings per year in the best case. Subtract the feed-in tariff of about 6 cents (electricity costs 30 C/kwh), that is 400 euros savings per year. Battery lifespan 15-17 years? Possibly subtract financing costs as well. Not worth it in 98 percent of cases. Just as useless as with solar thermal.

Fill the roof completely now (unless you have a steep north side), no matter what the solar installer says, and possibly upgrade the storage if the money is not enough.

In 98 percent of cases, it is not worth it.

On the one hand, the VAT can be deducted. On the other hand, there are sometimes quite high subsidies in the countries. And if you have a lenient tax office, you can even apply depreciation (AfA).

We are, however, in Germany. Therefore, this has hardly any relevance. Especially not for construction interest rates.

I agree with you, not for now. But if the USA reports good figures, the market will initially infer the same for Europe, until actually poor figures are reported in Europe. Whether the gas is really turned off and the unemployment rate really rises remains to be seen.

If I do a rough calculation: 5kwh charging per day x 365 = 1825 kwh savings per year in the best case. Deducting the feed-in tariff of about 6 cents (electricity costs 30 C/kwh) results in 400 euros savings per year.

Electricity costs currently(!), when I compare new contracts, are between 45 and 50 cents.