Switching to a combined heat and power plant

Hello, I moved into an acquaintance's apartment and he now wants to switch to a combined heat and power plant. So far, he has been getting regular electricity, but that has become too expensive for him. Unfortunately, I don't know the previous consumption. The apartment is 80m². I have already read and researched a lot of positive things about the topic. However, I would like to know if it really pays off. I don't know if you can say that without knowing the consumption. Does anyone have experience reports from someone who has switched? Thanks in advance

hello, I would also be interested in that, I have been employed for 4 months as a service technician in a heating company and was therefore, since my boss is into Vaillant, often at Vaillant for training courses. There was also such a combined heat and power unit for various fuels. The thing is actually not that big. Only the question of profitability and investment costs would be interesting. We are planning to build a house in about 4 years and now I am slowly starting to inform myself about various things, especially about heating...

best regards ronny

Hello, so I have thoroughly read through the page. It sounds very interesting and seems to be very economical. Now the question for me is, why do so few people have something like this? It is also very interesting that in addition to normal operation, e.g. using gas, it is also possible to heat additionally with wood... Of course, the question arises how much space is needed for everything, that is, combined heat and power plant, wood gasifier, buffer storage, and hot water storage for a 125m² house.

best regards ronny