EV charging points needed for a city
GuesstimateHardCapacity planning
The prompt
A city of about 2 million people wants to plan public charging for electric cars. If 5% of cars are electric, how many public charging points does the city need?
Extra context you can assume
- Assume most owners can charge at home or work some of the time.
- You can choose the charger type and charging time.
A strong answer usually covers
- Estimate cars in the city and EVs at 5%.
- Estimate the share of charging that must happen in public, and how often each EV charges.
- Convert charging demand into charger-hours and account for peak demand and utilisation.
- Divide by hours per charger to get a number, then sanity-check.
- Call out the most sensitive assumptions.
This scenario is fictional and made up for practice.
Practise your answer
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