Gas and Solar Thermal - Questions about the Offer

60 degrees is set, dead because of Legionella.

I thought you had an air-to-water heat pump? How is it supposed to produce 60 degrees?

I thought you had an air-to-water heat pump? How is it supposed to produce 60 degrees?

Do you know any other nordlys? [emoji1]

Of course, an air-to-water heat pump can also produce 60 degrees hot water (without an electric heating element). It just doesn't make economic sense.
Just look in the datasheets. For example Vaillant Arotherm up to 60 degrees with a 5kW air-to-water heat pump and up to 63 degrees with 8-11kW models.

With 3 collectors, I would - with a south-facing roof and an inclination between 25 and 45° - take at least a 300 l tank. Or better one collector less with 190 l. Otherwise, there might be a risk of overheating in summer if it is not a drainback system.

We have a south-facing roof (exactly 0°) with a 25° inclination.

I also read the following in another thread: "solar modules have to be cooled relatively early in summer, i.e. little hot water is needed but heat must be removed from the panels -> increased electricity and water costs without added value"

Are these things really so "stupid" and unable to handle excess energy otherwise?

Would the device not override my set target temperature and keep heating when there is an excess of energy? What exactly happens?

Currently, 190 l would surely be enough. But the children are growing... Is a later "upgrade" sensible in such cases or do you just live with the fact that gas runs more often or go straight for a bigger storage tank?

What about heating support by solar thermal? Does that make sense?

Firstly: We have gas plus hot water from solar. Secondly: Our tank is way too big for us at 300l. We never use that much. I wish I had chosen a smaller one.... but no one advised us. There it was. More is better.....smile. Heating support: Forget it. Expensive, lots of prone control technology. Doesn't help. If there is a lot of heating, then little sun. Karsten

The collector surfaces are needed to comply with the energy saving ordinance. You have the 300-liter storage tank so that enough heat is also absorbed. All of this is simply due to the decision for gas. You have to die some kind of death.