ᐅ Is solar power feasible, and how do I proceed? Help, tips, and advice

Addendum: You should act quickly. The 52 GW cap is approaching, and after that, subsidies might no longer be available, which could mean that solar photovoltaic systems may no longer be financially viable.

So you currently have a working solar thermal system
(hot water producing panels on the roof).

If possible, remove it and cover the roof fully with photovoltaic panels.

As mentioned, act quickly!! The 52GW cap will likely be lifted in August / September. Then there will be a follow-up regulation that no one knows yet and is expected
(looking into the crystal ball) to be worse than the current one (feed-in tariff guaranteed for another 20 years, which pays for your system). Plan without a battery; if you want, you can include one as well. Just be aware that the system will pay off more slowly because the battery storage reduces the return on photovoltaic and is still an (expensive) hobby.

There is a specialized forum for that, where you can get further advice ...

superzapp schrieb:

So you currently have a functioning solar thermal system
(hot water producing panels on the roof)

If possible, remove it and fully install photovoltaic panels on the roof

As mentioned, go for it! The 52GW cap will probably be lifted around August/September.
After that, there will be a follow-up regulation that no one knows yet and is expected
(looking into a crystal ball) to be worse than now (feed-in tariff still guaranteed for 20 years,
which your system pays for). Plan without a battery; if you want, you can add one. Just be aware that the system will take longer to pay off because
the battery storage reduces the photovoltaic system’s returns and is still an (expensive) hobby.

There is a specific forum for that, they will be happy to help you ...

In this context, I would like to ask the following question.
Originally, our installer had planned the installation for November due to scheduling. Until then, a lot could happen regarding the cap (luckily, our contract has a clause allowing us to withdraw if the cap applies before commissioning), so any day earlier can only be beneficial.
Now it happened that they were recently on site and wanted to install on the roof. Our architect sent them away again. She explained that although the roof is covered, since the dormers will only be finished when the insulation is installed, it could be difficult for the roofer if the photovoltaic modules are already on the roof.
That sounds reasonable at first.
Still, I feel that it can only be good if the panels go on the roof as soon as possible, so that once the electrician has done their work inside, the system can be connected to the grid.
Or am I missing something?

OK, I will try to have a conversation tomorrow.

From what I understand, feeding electricity into the grid is better than using it yourself (including with batteries). Are there any other subsidies or low-interest loans available?

Not exactly, using your own electricity directly is practically the “best” option.

HilfeHilfe schrieb:

OK, I will try to have a talk tomorrow.

From what I understand, feeding electricity into the grid is better than using it yourself (including battery storage). Are there any other subsidies or low-interest loans available?

This varies from state to state. Just search for Hesse and photovoltaic storage subsidies.