ᐅ Air-to-Water Heat Pump: Current Consumption and Data

The effort in my case was just ticking the box for "forecast-based loading" in the monitoring system... it took about 5 seconds.

And why should I hard-limit at 70%, just because it means losing "only 3-5%" of the annual yield?

For east/west roofs, of course, it's different. I have a pure south-facing roof with a 38° angle, fully covered with 45 modules. And I couldn’t really resist the battery storage—politics made me an offer I couldn’t refuse 8-)

Deliverer schrieb:

Regarding 40+: In this case, you can of course include the battery storage. Although in most cases, it doesn’t really become economically viable. Photovoltaic systems generate income; battery storage costs money. Even the ones that are basically free.

I would like to see that calculation sometime. But preferably in another thread. This derailment has been going on a bit too long. 😉

Jo, I also think that storage systems are often talked down too much. There are already offers where the storage is economically viable. The trend is clearly noticeable.

Be careful with batteries when it comes to money. I’ve had mine for almost 3 years now, and I can only get about 88% of the stored capacity out of it. If you approach this from a financial perspective, you should definitely include this in your cost calculations. In my opinion, the battery already included in electric cars is probably a better option—if you want to drive something like that...

The first models with bidirectional charging are already in development, and I’m sure this will become standard. However, it will still take about 5 to 10 years. This will largely make home batteries obsolete, since with home offices there’s usually an electric car parked at home anyway.

Since I only have a limited roof area (south-facing), I’m also hoping that the modules will become more efficient. I would really like to have more than the currently possible 7 kWp on the house.

Grid operators have so far successfully prevented V2H (vehicle to home) systems. In Germany, it is currently simply prohibited.
The business of decentralized energy storage seems to be reserved exclusively for certain players. Until then, progress is blocked wherever possible, just like in any dinosaur industry.

Hangman schrieb:

Even though I benefited in this case, you are unfortunately right. For example, I effectively get the charging station fully paid for even though I don’t own an electric vehicle. It’s not about meaningful initiatives, but about the political spin (“we promoted xyz kWh of renewable energy”, “we built xyz charging stations”, or in the case of KfW’s double subsidies for secondary apartments “we built xyz apartments”).

For photovoltaics, it would make much more sense to eliminate all the bureaucracy (commercial registration, VAT obligations, depreciation, grid connection requests, 70% hard/soft participation, smart meters, and so on). In my opinion, that would achieve more.

The funding goal has been achieved—to build more KfW40+ standard houses. That the initial incentive in your case could have been smaller is irrelevant.
One might even say the target was exceeded, since you were already aiming for the desired standard on your own ;-) If only every subsidy worked that well ...

By the way, I’m also excited about the wallbox subsidy. It’s being used up insanely fast. I’m already curious about the moment when there are more private charging points than BEVs on the roads ;-)
They tried to prevent this by excluding subsidies for new buildings. But it’s easily circumvented. As a result, everyone installs a free charging point even without owning a BEV. And those who already had a BEV will have likely already arranged for charging.
By the way, I’m now taking down my charging point to rebuild it with the subsidy. I’m selling the old wallbox; the new one works better with the smart home system.
Crazy ;-)