I really enjoy this one: https://app.electricitymaps.com/zone/GB

It shows energy sources for all of the countries in Europe on a map, import/export, prices and CO2 intensity.

My favourite for showing UK grid data on a nice, clean, fast chart over custom timescales:

https://www.electricinsights.co.uk/#/dashboard

My favourite for showing many country's grids around the world, and the power flowing between them through interconnectors:

https://app.electricitymaps.com/map

I love the data visualizations but I am always surprised to see so many different ones given how little use-cases they serve. They can broadly let people know where the power is coming for and help policy makers to a certain degree. They are just naturally interesting for a little bit while you explore but then drop off. It's almost like its most useful for exploratory data analysis and not a ton else

I'm curious if other people have interesting use cases here and how accurate is the data? Is this all people putting different layers on top of one source of truth for data - or patching together various sources?