1Battery capacity is not energy used every trip
A vehicle may not use the complete battery between charges. Calculate energy added rather than assuming every session is zero to full.
2Include charging losses
Energy drawn from the wall can be higher than energy stored in the battery. Charger efficiency, temperature and battery management affect the difference.
3Use real-world range
Speed, weather, load, air conditioning and terrain change efficiency. Use your observed range for cost planning.
4Compare home and public charging
Home tariffs may differ from public fast-charging prices. Calculate each use pattern separately.
5Add non-energy ownership costs
Insurance, tyres, service, battery warranty terms and depreciation should be included when comparing total ownership.
Practical checklist
- Know battery capacity
- Use local tariff
- Allow charging losses
- Use real range
- Compare total ownership
Frequently asked questions
Is every full charge equal to battery capacity?
Energy drawn can be higher because of charging losses.
Why is public charging more expensive?
Infrastructure, service and demand charges can affect the price.
Is EV cost per kilometre always fixed?
No. Tariff, efficiency, weather and driving conditions change it.
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