Photovoltaic system: Costs, saving potential? - Experiences?

Those are values. 2x 100%

Why do you have to decide now? Just consider empty conduits and that's it. Integrating something "conceptually" now only causes costs without benefits.

We plan very budget-oriented. Therefore, we would like to know whether we should already keep a buffer in the budget for photovoltaics or not... Hence the basic consideration in advance, whether photovoltaics or not.

Those are some values. 2x 100%

Do you have the values in winter as well?

However, do not sign a contract with the network provider! That is what we were advised. You will receive the [Erneuerbare-Energien-Gesetz] remuneration anyway.

Currently, it makes the most sense to have the preparations for photovoltaics done and to consider in the future, depending on what develops with feed-in etc., putting photovoltaics on the roof, right?

With an air-to-water heat pump, I can't store all the electricity I draw down, since battery storage systems are also currently very expensive, aren't they?

Details: Single-family house with hipped roof - KfW55 - 150m² with basement

Currently, it makes the most sense to have the preparations for photovoltaics done and to consider in the future, depending on what also comes up with feed-in, etc., putting photovoltaics on the roof, right?

With an air-to-water heat pump, I can't store all the electricity I draw down, since battery storage is currently also very expensive, isn't it?

Details: Single-family house with hip roof - KfW55 - 150m² with basement

You can ask the installer if they can accommodate the situation and include a clause in the contract that allows you to withdraw from the agreement if the cap takes effect before the system goes on the roof. That's how we managed it.

He "plans" construction start in 2021, because no installer will do anything today