You have to distinguish between fixed O&M and the extra cost that comes from an extra hour of running.

I’ve been googling and using LLMs and there’s no literature on the subject, but the companies owning them effectively treats it as zero.

In government models they seem to have landed at €1 per MWh.

The best estimates both Claude and ChatGPT came up with was both ”low single digit € per MWh”.

This report was linked, and ARUP the author did not get any replies when they asked the offshore wind companies this question.

https://assets.publishing.service.gov.uk/media/6966a5c7e8c04...