Construction costs are currently skyrocketing

It's a clear calculation
If I do a simple calculation: 5 kWh charge per day x 365 = 1825 kWh savings per year in the best case. Deduct the feed-in tariff of about 6 cents (electricity costs 30 C/kWh), that is 400 euros savings per year. Battery lifetime 15-17 years? Possibly subtract financing costs.
Not worth it in 98 percent of cases.

Just as useless as with solar thermal.

Counter-calculation: Last year I stored 2,600 kWh with my battery. With your 6 cent feed-in tariff and 30 cent electricity costs, that's 624€ per year. Taking your 15 years as lifetime as well, the battery (in my case 10 kWh) must cost less than 9,360€ net, i.e. 11,138.40€ gross. Taxes and rising electricity costs left aside.
And as already mentioned, the 30 cents will soon be very unrealistic. Some are already paying over 40 cents per kWh.

Some more info from me as well: Tibber does not use advance payments if you have a smart meter, but you receive a usage bill at the end of the month. Prices change every hour. In the app, I can see the electricity prices for the current day and from 1 pm for the next day. We have already adjusted our behavior accordingly: washing machine, dishwasher, etc. run when it is cheap.

In June, we used 347.59 kWh at a price of 39.95 cents per kWh = 124.97 euros. If we had not adjusted our behavior, the average monthly price would have been 44 cents = 152.94 euros. That’s already 28 euros just because you try to use the prices at the cheap times.

The cheapest provider in the price comparison (without bonuses etc.) currently wants 188 euros per month.

If I now "misuse" the storage to buy electricity at cheap times and then also use it for consumers that I cannot influence – I think you can save a few more euros.

If you’re wondering why it’s so expensive: until August 21, Tibber’s average was also 20 cents per kWh. Since then, it has only gone up. I was able to see the development months ago because of the billing method – many will soon be very surprised when the adjustments come...

What are you all buying memory for? It's still completely uneconomical.

kfw40+ characters characters characters 3 characters

kfw40+ characters characters characters 3 characters

Well, I'm taking the storage completely without money from the state - I'm probably stupid :cool::p

Here are some more infos from me: Tibber does not use advance payments if you have a smart meter, but you get a consumption bill at the end of the month. Prices change every hour. In the app, I see the electricity prices for the current day and from 1 p.m. for the next day. We have already adjusted our behavior accordingly: washing machine, dishwasher, etc. run when it is cheap.

In June we used 347.59 kWh at a price of 39.95 cents per kWh = 124.97 euros. If we had not adjusted our behavior, the average monthly price would have been 44 cents = 152.94 euros. That’s already 28 euros just because you try to use the prices at cheap times.

By the way, the cheapest provider in the price comparison (without bonuses, etc.) currently wants 188 euros per month.

If I now “misuse” the storage to buy electricity at cheap times and then also use it for consumers that I cannot influence – I think you can still save a few euros.

In case you wonder why it is so expensive: Until August 21, Tibber averaged 20 cents per kWh. Since then, it has only gone up. I was able to see the development months ago because of the billing method – many will be shocked when the adjustments come…

Well, I just switched back to the basic supplier and will pay only 23.49 cents per kilowatt hour in the future. Your 40 cents are almost double that. Really crazy.

I offer 23.15ct/kWh since 1.8. via Yello. (Secured 10/21 with full price guarantee) The basic supplier would then be the next cheapest at around 28ct/kWh.