How to update Power BI every minute

Hello Rasmus_B ,

With import mode, you get to schedule a refresh every 30 min for 8 times only per day for a pro license and 48 times for Premuim license.

But you can get the data as a direct query were you can have live data without refreshing, https://learn.microsoft.com/en-us/power-bi/connect-data/desktop-use-directquery

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With Premium you can refresh programmatically more often than 48x per hour, which is merely a UI limitation. That said refreshing an Import cache every minute is not going to work.

Aside from DirectQuery as you suggested, Rasmus_B should also have a look at streaming and push datasets:

https://learn.microsoft.com/en-us/power-bi/connect-data/service-real-time-streaming