Are solar systems and heat pumps economical?

Hello, I have a question?
Is a solar system combined with a heat pump worthwhile? What are the ecological and economic benefits here? :rolleyes: The solar system is planned for heating the water.
Thanks a lot for your answers!

Hello casimum, the question of "is it worth it..." is a bit tricky: financially, this investment will probably not pay off easily, but in terms of supply security, this investment can be worthwhile, as you become (more) independent from external energy supplies. This independence is becoming increasingly important nowadays, where every cough from a politician drives oil and gas prices up. Technically, this is not a problem and has been tested thousands of times; however, the consumption of energy to operate such a system (electricity) and for additional heating during special cold periods must be minimized. It is therefore important to tailor the solar system and heat pump directly to the location (your house) so that everything works efficiently. This should be planned and calculated by a specialized engineering firm. This is also where the question of amortization is addressed.

Hello Hertweck

Thank you very much for your reply. My thought was, however, whether it really makes sense to install a solar thermal system for hot water supply in addition to the heat supply from a ground source heat pump. My first thought was that a ground source heat pump already works ecologically and efficiently and also heats the water. Wouldn't a solar system for electricity generation make more sense instead? Also with regard to independence from electricity providers? Geothermal energy cannot simply become more expensive or be switched off, can it? I hope I am not on the wrong track....:confused:

Thanks!

Hello again,

Photovoltaics are often used in combination with a heat pump to generate the electricity needed to operate the heat pump. In general, a photovoltaic system is not sufficient to supply a house with electricity for all consumers (stove, lights, etc.). There are attempts to achieve this as well, but the entire house, the setup with electrical consumers, lighting, etc. must be coordinated already during the planning phase.

Thermosolar systems are continuously being replaced by photovoltaics - for cost and efficiency reasons, because the most heat is produced exactly when you need it the least... So a simple, ordinary grid-connected photovoltaic system is easier. Whether the electricity is then used by your heat pump, or elsewhere in your household, or you sell your solar electricity on a [Börse] or to your [Versorger], you can at best decide later...

Great, here writes the expert and that is really amazing. It only pays off after 89 years? That really makes no sense or the money is readily available.