:) You might be right, you might be right.

Actual CPU load for the mining process is around 48% so the loss according to your estimates is a bit lower.

And the actual price per kWh at my place is 0.126 €.

For a 30 days long month that would be:
30 days * 24 hours * 0.126 €/kWh * 0.17 kW = 15.4224 €.

Let's assume that the load of 47% is accurate => 7.25 €

Still at loss :)

But ... if I carry on this excercise ... I am working on a leased energy because I am paying monthly based on last year's consumption. So the rise in monthly payment, if there will be any, will come sometime in the autumn. By then the price of now mined bitcoin will increase ... twofold, threefold, ...? :) Or it just might sink :)