Earlier quoted context omitted.
Continent sized landmasses can survive on wind and solar assuming HVDC interconnects. Some storage would be nice to have, preferably more than a weeks' worth.
Let's approximate the cost of that. The energy consumption of my country (the Netherlands) was 3157 PJ in 2017. This was 980 kwh per person per week. Solar batteries cost a bit more than $1000 per kwh. So at these prices this plan costs approximately $1 million per person. Solar batteries last 5-15 years. If we say that they last 20 years, then the energy storage costs are $130 per person per day per week's worth of…
Storing a weeks worth of consumption on a 'per person' basis can be done for a fraction of $1m. But energy scarcity will lead to an increase in prices, which in turn will lead to a reduction in consumption. One big problem with energy is that it is still way too cheap.
Another problem is that there are a lot of subsidies involved for large consumers as well as extra taxation on small consumers.