Hi there,

This is a great question as it's really testing your ability to make reasonable assumptions about the world, lacking any real data.

By # of Electric Cars

1. Population of Ho Chi Minh - Around 8 million?
2. # of adults - Around 5-6 million
3. # of cars per person - around .5 (probably 1 per household)
4. % of electric vehicles expected in 10 years -
   1. highly variable based on country.
   2. While Vietnam is a developing country (points against), they are also command-and-control communist and are capable of big change (points for).
   3. The global rate of EV uptake will probably equate to 1% of the global fleet each year (obviously less now, more later). So, perhaps 10% globally? Let's place vietnam around there
5. ​Big consideration: Charging stations are a leading investment to electric cars. So, you need capacity there before demand hits. We will probably need around 1 charging station per vehicle (docking at night). And this would need to lead by a few years. So, we might need charging stations for 15% of the Vietnamese car fleet (instead of 10%)
6. Answer = 375,000 - 450,000 charging stations:
   1. (5 - 6 million people) X (.5 cars per person) X (15%)

(editiert)