Da fragen wir doch einfach mal CHAT GPT, was der meint:
Frage: Ist Solarthermie, oder PV Strom besser, um warmes Wasser zu generieren?
When it comes to generating hot water using solar energy, both solar PV and solar thermal systems have their own advantages and disadvantages. The choice between the two depends on various factors such as the location, climate, available space, cost, and energy requirements. Here are some key differences between the two:
Efficiency: Solar thermal systems are generally more efficient at producing hot water than solar PV systems. This is because solar thermal systems directly convert sunlight into heat, whereas solar PV systems convert sunlight into electricity, which then needs to be converted into heat using an electric water heater. However, the difference in efficiency may not be significant in smaller installations.
Cost: Solar PV systems are typically less expensive than solar thermal systems, especially for smaller installations. This is because solar PV panels are mass-produced and widely available, whereas solar thermal systems are less common and more complex to install.
Flexibility: Solar PV systems are more flexible in terms of installation and can be mounted on rooftops or other structures. Solar thermal systems require a dedicated location with good access to sunlight.
Maintenance: Solar thermal systems require more maintenance than solar PV systems, as they involve a more complex system of pipes and pumps. Solar PV systems are simpler and require less maintenance.
In summary, if you have a high demand for hot water and a lot of available space, a solar thermal system may be more efficient and cost-effective in the long run. However, if you have limited space, a smaller budget, or a lower hot water demand, a solar PV system may be a better option. Ultimately, the best choice depends on your specific circumstances and requirements.
Frage: Aber ist die Effizienz von Thermie nicht besser, als die von PV Anlagen?
You are correct that solar thermal systems can have higher conversion efficiencies for generating hot water than solar PV systems. In a solar thermal system, the sunlight is directly absorbed by a collector and converted into heat, which is then used to heat water or another fluid. In contrast, a solar PV system converts sunlight into electricity, which is then used to power an electric water heater or other devices.
The conversion efficiency of a solar thermal system can be very high, typically in the range of 50-70%. This is because the heat generated by the solar thermal collector is used directly to heat the water or fluid, without the need for any additional energy conversion steps.
In contrast, the conversion efficiency of a solar PV system is typically lower, ranging from 15-20% for standard silicon-based PV panels to over 20% for more advanced PV technologies. This is because the conversion of sunlight into electricity involves several energy conversion steps, each of which results in some energy loss.
So, in terms of conversion efficiency, solar thermal systems do have an advantage over solar PV systems for generating hot water. However, it's important to note that the overall efficiency and cost-effectiveness of a solar thermal or solar PV system will depend on many factors, including the specific technology used, the location and climate, the available space, and the energy requirements of the building.
Yoah… 
