Air-water heat pump current consumption and data

Where do you get more official values than from the WR?

The generation meter is "of course" located in the inverter, minus the feed-in from the feed-in meter/register of the grid operator = self-consumption.
The inverter itself also calculates the self-consumption, based on the same generation meter in the WR, minus the household consumption, which is determined by the smart meter and transmitted to the WR (in my case via Modbus, previously also via S0 interface, when I still didn't have a smart meter).
These two calculation methods definitely diverge, although not significantly. The value of the self-consumption directly from the WR is always lower than the official value, which was determined by the first method.

Aside from that (we are off-topic anyway), the bureaucracy madness is the downside of solar energy. Why not simply have rooftop photovoltaics up to 30 kW at a reduced VAT rate, and completely eliminate VAT refund/assessment? Likewise, any ridiculous income-expenditure accounting that, with the current remuneration rates, always ends up below the allowance anyway. A completely unnecessary photovoltaic obstacle.

The inverter itself also calculates the self-consumption, ...

Ah, thanks. I need to see what my smart meter makes of the original values.

Apart from that (we are off topic again anyway), the bureaucratic madness is the downside of solar energy. Why not simply have rooftop photovoltaics up to 30 kW at a reduced VAT rate, and completely do away with VAT reimbursement/assessment? Likewise, any ludicrous EÜR which, at the current compensation rates, always ends up below the exemption limit anyway. A completely unnecessary photovoltaic obstacle.

Basically, I agree with you. However, there is progress that must also be acknowledged: - With the 2019 Annual Tax Act, trade tax liability for systems up to 10 kW was abolished - In the 2020 Annual Tax Act, the Bundesrat wanted to introduce exemption from income tax liability for small systems, but it was not approved by a majority. Instead, the tax authorities introduced a simplification rule - you can now classify the system as a hobby informally, and then the EÜR is done. - After 5 years, switching to the small business regulation also takes care of all issues related to VAT.

Basically, I agree with you. But there is progress that must also be acknowledged: - With the 2019 Annual Tax Act, the trade tax obligation for systems up to 10 kW was abolished - In the 2020 Annual Tax Act, the Bundesrat wanted to initiate the exemption from income tax for small systems, but it was not able to secure a majority. Instead, the tax authorities introduced a simplification rule - you can now informally have the system classified as a hobby, then the income-surplus calculation is done. - After 5 years, switching to the small business regulation also settles all issues regarding sales tax.

I am aware of this, I just have the private problem that a) more than 10 kW, and b) I initially made a larger depreciation and the simplification rule is not (any longer) applicable for me. Although I still end up below the exemption limit with the income-surplus calculation, at least it is calculated down to the cent according to all the rules of the art :rolleyes: Who knows, maybe a simplification-of-the-simplification rule will come soon ;) I manage it myself, but I know enough people who say "it's too complicated for me, I won't do it" - that was what I meant.

Has the 10 kWp limit not meanwhile been extended to 30 kWp? Or is the final decision still pending?