> The 5GW consumption I assume is per day? If so, that’s on par with 170,000 average homes… being put in a parish with around 7250 households.

Watts are Joules per second, you'd only measure "watts per day" as a rate of change of power supply, not absolute power supply.

Also, 5GW / 170000 homes ≈ 29kW/home, even the USA isn't that heavily supplied with electricity.

(My home in Germany is very efficient, 0.5 kW average, including heating and cooling as well as all devices).