01
Power is a rate. Energy is an amount.
kW describes how quickly energy flows; kWh describes how much you use. Level 1 uses a 120 V supply. Level 2 uses 240 V. The available circuit, charging equipment and vehicle’s onboard AC charger limit actual power.
02
Replace the commute, then test a harder day.
Use the calculator with your total daily kilometres, parking hours and battery-side consumption. Increase consumption for a winter scenario. Its efficiency allowance is editable; severe cold, battery heating and shared charging can reduce recovery further.
03
Get the installation assessed first.
Ask a licensed electrical contractor about capacity, cable route, outdoor equipment, permits and load management before assuming you need a service upgrade. Confirm outlet suitability and manufacturer instructions. Do not improvise with an unapproved extension cord.
Sources & further reading
Manufacturer examples apply to the stated vehicles. Check the exact model-year documentation and current program rules.