Pellets with solar thermal or photovoltaic?

I think once Ziegenpeter has been presented with the exact energy calculation as well as the costs for the nonsense, the matter will be off the table anyway.

Maybe he has a sawmill nearby? Or a swimming pool in the basement? Or his community sells sustainable pellets from its own forests to the citizens? He must have his reasons why a heat pump is "definitely" not planned.

Often it's prejudice. But you're also right if you get pellets cheaply or there is a subsidy. However, you must not forget the (very large) space requirement for the heating in your calculation.

The question now is what is more sensible.... 1. Support through solar thermal energy 2. Photovoltaics with a heating element in the buffer

3. Photovoltaics with domestic hot water heat pump. Using the electricity directly for heating is not sensible.

The estimate of about 12 KW comes from an "online calculator" of a boiler manufacturer. I don't know if that much is needed. But I think less will easily be enough.

But so far, I have hardly found any pellet boiler with less than 10KW.

A buffer tank with 1000 liters is planned.

For me, a pellet boiler in a new building is quite simple.
- No gas available
- Oil is a no-go
- Geothermal with probes is not possible due to groundwater level and soil conditions
- I don't want an air heat pump because of power consumption in winter. I still consider it purely an electric heating system where I buy a lot of electricity in winter, and that is getting more and more expensive. Sure, pellets will also get more expensive...

It's also a matter of belief.

I find pellets a very nice and natural heating.

Space should not be a problem. The cellar for heating and buffer has about 28 sqm.


what is meant by the domestic hot water heat pump? I don't know that system

It's also a matter of belief.

Yep - and I believe that with an air-to-water heat pump you save tens of thousands of euros. The basement space saved alone is enough to pay for the electricity needed for the air-to-water heat pump for the next 300 years.

For the additional costs of your pellet heating system, you will be able to heat for many, many years for free with an air-to-water heat pump.

Regarding the air-to-water heat pump, I would inform myself better. Somehow it’s always funny "it uses so much electricity in winter," the oil heating system also uses much more oil in winter, the gas heating system also uses much more gas, and your pellet heating system also needs many, many more pellets than in summer.