Alright, that would make sense. However, not financially, if you then "throw away" the VAT. Be that as it may. We as a forum are not the contact for electricity meters...?
No, that is all correct, it is called meter cascade aka measurement concept 8. Reference October 21 does not say anything about since when the photovoltaic system and meter have been active ... with the high values, it is assumed that this already took place in summer.
Correct, the meter was installed in June, then the dry heating of the screed also ran over it...