Is preparing for photovoltaics in new construction sensible?

The 10 kWp are irrelevant for trade tax since they are well below the mentioned exemption amount.

Please be careful here and do not confuse this with the 24,500 euro exemption amount in trade tax.

As an operator of a photovoltaic system, which is to be claimed for income tax purposes, with a capacity of over 10 kilowatts installed, i.e., not capped capacity, one is still a compulsory member of the Chamber of Industry and Commerce (IHK)!

Consequently, one is generally also liable to pay contributions to the IHK. The only exception is if the trade profit does not exceed 5,200 euros per year, § 3 para. 3 sentence 3 IHKG.

Although one usually should not exceed this, one is nevertheless a member of the IHK.

we commissioned it and the electrician said it wasn’t necessary..

It's a 30 euro surcharge for us, but having is better than needing, or how was that :D

I would also plan a separate conduit for grounding/potential equalization. Potential equalization should have a distance from the DC cables and the rest of the house electricity.

Ah thanks for this thread, it fits like a glove that I immediately check whether anything has happened with me yet.

Which solar installer did you choose and would you recommend them?

Which solar installer did you choose and would you recommend him?

Hey, we worked with GT Solar. The price looked pretty OK and they knew the roofer from the general contractor and subcontracted the installation to him. Overall, there were no problems at all, they were much faster than we needed.

Now we have had the solar panels on the roof since the end of 2020 but have no idea if they work. They look good though. But due to winter and the extremely slow bricklayers, almost nothing happened for a long time. I hope the house connections will come at the beginning of May and then GT Solar can also install the inverter and we can start feeding in. I would find it quite good to be able to use the solar power during the screed program.

Which solar installer did you choose and would you recommend him?

We installed our system years ago and have been very satisfied so far.

The Photovoltaic Forum (just google it) has also been offering photovoltaic systems at a very good price/performance ratio for some time now, you could possibly inquire there as well.

A few weeks ago I contacted them, unfortunately with zero response or result. Obviously overloaded!?