The electrician is said to have severely injured his thumb and therefore cannot complete the invoice so quickly.......main thing is to buy time, I will probably have to involve a lawyer/[expert].
I wanted to give you an update, the electrician sent me the list.
What immediately caught my attention is that the prices have suddenly increased and I only have 18 windows/shutters... the last two pictures are from the first offer back then, it was a stripped-down version of KNX or something like that, but you can see the socket price there, I am also sure that he exaggerated with the meter count of the empty conduits.
It's really a pain to have such disputes. Basically, the electrician has to calculate his time and include it in the offer. If he miscalculates, that's only your problem if this is caused by constant changes or extremely high communication needs. I would proceed as follows:
[*]Determine what is missing. [*]Withhold the amount for it + risk surcharge [*]Have it completed [*]Material price increases and pipe meters are not clearly identifiable to me, but also not so relevant in total. [*]Settle the invoice as last demanded – with 100% functionality. [*]oh yes – and even if it's tempting: no comments on the individual interpretation of spelling – it only adds fuel to the fire.
That way you get the desired result and have the shortest amount of trouble. Maybe not financially optimized by all the rules of art, but optimized for quality of life.
Oh dear, the old man doesn't finish the work, I didn't consider that. He can just take the legal route. For you, it is enough to contest the statement and reject the invoice as incorrect. What was done you of course have to pay for. Mass verifications are usually requested via measurement.