Which heating system for the 200 sqm new building?

I still don’t understand what I gain without storage from the fact that the photovoltaics produce a lot of electricity for me in summer that I don’t need then, I need it in winter. Unless I have air conditioning.

Monthly advance payments to your checking account. Feels good

what do you want to do with the electricity at night?

For example, to cover the base load of the house, lighting, computers, start the cleaning machines early in the morning when the roof electricity is not yet sufficient...

Early in the morning before 6, you don't have to run cleaning machines. I can say from experience that in summer we don't have to buy more than 2 kWh per day, except sometimes up to 3 kWh. There may be different flow temperatures, hence the question of what he wants to do with the electricity at night. Storage is more interesting for winter, then we have to buy quite a lot. But you would need 30 kWp on the roof so that something is left for the battery. A 3-4 kWh battery would be great for us; as soon as it is available for SolarEdge for under €2000, it will be bought.

If you sew it correctly, you have wind power in winter - but we don't do that right away.

If done correctly, no new construction is built at all. Because hundreds of thousands of kilowatt-hours of energy are sunk into it (not even counting the muscle power and its generation). So what is the topic?

As mentioned, currently in summer, 40-45 kWh come from the roof here, the house consumption is 10-12 kWh. In winter, it is the other way around. Overall roughly ±0 with 6500 kWh consumption and 6.82 kWp photovoltaic system. I think it’s good. It works, it pays off, even without self-consumption. The rate is about 33% without storage.

The idea of a storage system is understandable and smart. Unfortunately, they are too expensive. Both from an economic aspect and in terms of the ecological balance. Urks. Otherwise, I would have bought one right away, because one thing is clear: if storage, then directly with the photovoltaic installation, because you then get the VAT back on the investment. For retrofitting (currently), you do not.

We have a red roof, so the appearance of the photovoltaic system would really bother me. Such a system costs a considerable amount and the payback period is usually 10 to 15 years. So normally no one would invest in it. However, the advantage is that the (low) return is relatively secure and predictable. Nevertheless, I am always against photovoltaics. There are better investment opportunities and much more important things in house construction. The fact that my opinion probably corresponds to that of the majority of home builders is evident in the new development areas. Photovoltaics are extremely rare here; maybe 1 in 20 houses still do it.