Problems with the alignment of our planned solar installation

The answers unfortunately show that one relies on a property developer here. His goal is "to sell as little as necessary, as expensively as possible."

What is a 5sqm solar thermal system with a 200-liter storage supposed to achieve? That is way too little storage volume. On the other hand, it seems it is only intended to prepare the hot water. But why 5sqm - probably to take advantage of the subsidy. But that doesn’t change the nonsense! What heating system will be installed? That question has not yet been answered.

And why don’t you simply ask about alternatives? Why should the house be unnecessarily redesigned because of a solar thermal system? Here the question arises how well informed the property developer + energy consulting are...? Just ask whether a small domestic hot water heat pump might be sufficient for the hot water. Plus a small photovoltaic system. The domestic hot water heat pump is available in all variants. (Air heat pump - outside / in the basement, with integrated water storage...) That certainly doesn’t cost more! The photovoltaic system on top - and you have a rounded solution that will already pay off after about 8 years (8 years is roughly the ROI of a current photovoltaic system - without a battery - and if the price is right).

P.S. I only mention the photovoltaic system because it is still a good investment at present. Part of the generated electricity is used for your own consumption, the rest is fed in. For own consumption, you calculate with at least 25%. Depending on which heating system you have, or how hot water is prepared in summer, you can achieve even higher own consumption.

I do not share the skepticism towards 5 sqm solar. With this small area, we had 100% hot water until the end of October, only then did I have to turn on the heating. The plan is to go back to solar only from 1.3. Karsten

same here...with 5sqm photovoltaic I can understand that ST at least provides warm water...but that helps the OP little now. I would simply go for 7.5sqm and place the system in the west...or simply have it recalculated.

Good morning

As described by Mycraft, that is correct.

An increase in storage volume, e.g. to 300 liters, only marginally increases the solar coverage ratio.
Therefore, and to keep the systems as compact as possible, 200 liters are often offered by the industry for single-family homes.

However, I am quite surprised, in a recent discussion I was still told that heating systems should be as inexpensive as possible to purchase.
Here, a domestic hot water heat pump combined with photovoltaics is recommended without objection.

It’s just not about biomass, where you can gladly spend a lot of money.



Olli

Some here are tech cool. I’m more into women. [emoji41]

Actually, the most economical and simplest way is probably to install one more module, about 7.5 sqm then, in the west. And that's that. Wrobel. One more part can't be that expensive, it all comes from China after all.