alt Hacker NewsData is from https://app.electricitymaps.com/map
The difference is so big because renewables are just that much more efficient than coal and, to a lesser extent, natural gas. You can have 60% coming from renewable sources and still emit 400g/kWh with a coal and gas mix, whereas all hydro is 24g/kWh according to that source. The production component is what makes renewables not completely emission-free
I'm curious how you got the energy consumption for 8 hours of use.
I would imagine there's a huge spread there too. Depending on hardware, size of the model, requests being batched and queued rather than occupying a whole GPU or TPU, or if you are running an agent loop for 8 hours straight or spend most of the time reviewing results.