Energy Saving Ordinance 2009 even without solar?

Games

Hello, these are games; the craftsmen who are standing at the ready usually have their annual contracts or are put under price pressure.
The seller earns his money from you (commissions) :(. One could talk about price increases in January and at the end of the year, as that is usually when suppliers increase their prices.

Regards
Bauherren2010

Hello,

At the last meeting he said that prices will be increased in about 4 weeks. But these are not the catalog prices, rather the possible discounts that can be given.

This statement can certainly be correct. Every general contractor (GU) has a discount scale with their main contractor (GH), which depends on the respective sales and is adjusted from time to time. This is a basic rule. Since sales have dropped significantly nationwide and are still dropping!!!, this problem naturally exists. In an upward economic trend, the "big players" benefit from this arrangement. At the moment, however, they are facing significantly bigger problems because their corporate strategy is based on "mixed calculation" and mass sales and not on individual "quantity and mass determination."

These 4 weeks have now passed and he offered us a contract in which the old prices are fixed.

The question is whether the GU receives or can receive their discount scale with the sales volume of your construction project (BV). Due to the weakening economy, he might have to offer your project at a lower price in six months in order to remain competitive in the market, i.e., reduce his own profit.
Decisive is the company’s equity ratio, not the references from the past ;-)

My wife and I are currently under quite time pressure, which is actually not a good advisor when building.

You have answered the question yourself perfectly!!! Because time pressure always plays in favor of the contractor.

Best regards

KfW85 without solar system

Hello €uro,

In advance, we had planned with a solar system (not a photovoltaic system), as all builders and general contractors told us that the Energy Saving Ordinance requires it. Meanwhile, we have received the building permit for a single-family house based on KfW85. The energy performance certificate has also already been provided to us.

After inquiries about which system is best, we were told that the savings per year would be only €80 to €90. This was confirmed to us by several sources to about that extent. Our solar system with a 300-liter domestic hot water tank costs around €4,500. Thus, the system would pay for itself in about 52 years. Well, assuming the lifespan lasts that long.

My question is:

Can I omit the system and instead only plan a preparation for a later photovoltaic system?

Thank you very much in advance for your information.

Hello,

...in advance, we planned with a solar thermal system (not a photovoltaic system), because all builders and general contractors told us that the Energy Saving Ordinance requires it this way.

That is simply not true! This shows you how objectively you were advised.

... The energy performance certificate has also already been made available to us.

You mean the Energy Saving Ordinance proof.

...
After inquiries about which system is best, we were told that the annual savings would be only €80 to €90.

Have you seen these calculations?

...approximately confirmed.

Yes, such generalized statements are unfortunately common.

...
Can I omit the system and instead plan only a provision for a later photovoltaic system?

No – not without further ado, since the Energy Saving Ordinance proof is part of your building permit. Subsequent changes of this kind must be approved by the building authority. However, an expert report according to §25 Energy Saving Ordinance or §9 EEWG would be necessary.
If photovoltaic, then immediately, because the doors to these subsidies are already closing.

Best regards

Experience

Hello €uro,

thank you for taking the time. Yes, I was shown the calculations, but since I/we are complete laymen....well, you can imagine the rest!

What are your experiences with a solar system for domestic hot water heating? A gas heating system with underfloor heating on the ground floor and upper floor is still planned. What savings can be achieved with about 160 m² of living space? When does the solar system pay for itself?

Thank you.

Hello haeuslebauer,

a solar system only for hot water almost never pays off, roughly speaking, savings of 40% are advertised. Ultimately, you save 40% of 20% of your energy costs, 80% is for heating. So, if you have 1000€/year in energy costs, the solar system actually brings 8% of that in savings, so 80€/year. Therefore, it takes about 40-70 years depending on the manufacturing costs of the system. The durability is 15-20 years.

If you now also calculate that you usually do not pay the investment costs in cash but finance them with a loan, these costs have doubled in 30 years, at the same time you would have to save up to replace the system in 20 years.

If the investment costs are covered from own funds and invested at e.g. 4% interest, the return would be higher than the savings, and so on.