[norenh]

The article mentions "no more than 2,000 watts (i.e. 2 kWh per hour or 48 kWh per day) by the year 2050, without lowering their standard of living" so it is not 2kWh/day but 2kWh/hour. You are already below it in your household.

[kiliantics]

There are still a lot of omitted factors in the above accounting. The car's petrol use was mentioned but not added, then you have all the embodied energy in the food and other consumed items that were never included. Finally all the energy in the construction and maintenance of infrastructure used, such as roads and internet.

[jandrese]

48kWh/day is not hard to achieve at all. That’s just about what my solar array produces and that’s more or less energy neutral for our household. We are far from energy misers as well.

Some of it depends on the local climate and other factors that you don’t have a lot of control over though.

[nicoburns]

That 48kWh/day is supposed to include the energy used to make all of the objects you own and use though, not just your household energy usage. It takes a lot of energy to produce a house or car just to name two examples.

[notatoad]

note that the example in the article of a swiss person's 5.1KW usage includes only 0.6KW of electical power draw, with the rest coming from other sources.