Hence the word “averages”: most people are going to do that every week or two overnight, when demand is well below peak.

If you want a harder problem, it’s electric building heat in cold climates.

Keyword - averages. 50km a day is about 7kwh which is about 500w on average.

That said my basic calculation for New Zealand is additional 50% is needed. Probably easy peasy if we get over lobby given how much existing hydro we have and capacity for sun and wind.

Using Chinese offshore wind turbine costs my estimate was 1/3rd of some major railway project cost we are considering…