New photovoltaic system with storage in single-family home - experiences

Hello,

I have simply attached a data output from my system here. In the digital world nowadays, you can retrieve everything super easily via app, and even the notifications to the tax office are so incredibly simple.
Here you can clearly see what the system has achieved so far. It has been in operation since mid-March and we have been living in the house since April.

8.1 kWp
on the roof 36x Heckert Solar NeMo
Battery storage system E3/DC S10E 2Z with 4.6kWh batteries

Additionally:
An air-water heat pump, ventilation system, fresh water station as well as accessories... all from Waterkotte, and for the winter a water-guided pellet fireplace from Olsberg.

It was important to us to have the entire system from one manufacturer so that everything fits together.

Everything is networked and can access and use the data of the other devices. For example, the heat pump uses the surplus generated by the photovoltaic system during peak times to heat the water without drawing electricity from the grid.

So we are very satisfied with the system. Of course, we know that in winter the whole ratio will change, but with such systems you always have to consider the entire year.
In our case, one kWh costs just under 0.30 cents. Without the photovoltaic system, I would have had to pay for 3441 kWh so far, which would be about 1032,- euros. By using self-generated electricity, it is only 351.30 euros, so in 5 months 680,- euros saved plus the small yield of 357,- euros.

Of course, everyone has to decide for themselves, but we are thrilled.

You still pay 4.8 cents VAT per kWh on self-consumption as far as I know (based on your 0.30 EUR per kWh - basic fee not included). So another 108.91 EUR gone, right?

And then there are taxes on the profit from feed-in? There you of course have to apply your marginal tax rate, as it is additional income to your other income.

So at the moment saved plus profit minus various taxes is about 850-900 EUR and maybe through the winter season still, I don't know, 1,200 EUR total?

Oh yes, don't you also need insurance for photovoltaics and isn't there an increase in the building insurance?

The storage 10,000 EUR? The rest of the photovoltaic system 12,000 EUR? 22,000 EUR?

Theoretical amortization, whereby I didn’t even include all costs, over more than 18 years. But after 10 years you will already replace the inverter.

It’s a nice, technical gadget and certainly you won’t make too much of a loss, but you won’t really save either.

With us, one kWh costs just under 0.30 cents. So far, without a photovoltaic system, I would have had to pay for 3441 kWh, which would amount to about 1032 euros. By using self-generated electricity, it is only 351.30 euros, thus saving 680 euros in 5 months plus the small income of 357 euros.

What I find missing in this statement are the costs for the system, distributed over 10 or 15 years if you like... but no matter how you look at it, the system with storage will still have cost more than 10,200 euros after deducting all subsidies (15 years x 680 euros + X for winter months).

Therefore, you can probably only make this calculation after a full year, when 1) you know the complete cycle and 2) the tax office has struck. Because you also have to kindly pay tax on your own consumption.

You are absolutely right and everyone has their own views. I just wanted to give the topic starter something to look at, how to look at something like this. If the system were in Bavaria, it wouldn't look any different either.

One should also consider that all these costs are tax deductible. As well as the nice value-added tax being refunded.

The whole thing is also something for the good feeling for the sake of the environment and independence from others. Although we don't quite achieve this completely, we are pretty close. Furthermore, the heart of the photovoltaic storage can be used for a smart home, and those who like this can save even more here. The special thing here is also the interaction of the devices and thus their optimal use. The costs are around 23,000, although, as mentioned, there is the 19% refund.

But you only see one side again... yes, the VAT is refunded, but you have to pay tax on the withdrawal from the photovoltaic system... so somehow it's just moving money from one pocket to the other... Overall, this issue must not be neglected.

Photovoltaic systems with storage are currently a gimmick and a satisfaction of the green conscience (if the production and disposal of photovoltaic systems and storage are ignored) and you pay for it. Economically, it is not a very sensible investment, unfortunately. If electricity costs 50ct/kWh someday, it will look different again.

I see the positive side and others the negative, that is correct, and this forum is indeed for exchanging views so that the interested reader can form their own opinion.

It is such that one must speak here of offsetting between input tax and sales tax. Also to be considered are the annual depreciations as well as the depreciations of any costs related to the installation. The value-added tax on the electricity sold, for example, is paid by the buyer.

It also has the advantage that as an entrepreneur you can take advantage of various benefits.