kW vs kWh
kW is power (speed); kWh is energy (amount).
A kilowatt (kW) measures how fast energy flows — like the width of a hose. A 150 kW DC fast charger can deliver energy much faster than an 11 kW Level 2 station.
A kilowatt-hour (kWh) measures how much energy you actually moved. Adding 30 kWh might take 20 minutes at a fast charger or several hours on Level 2, depending on your vehicle's limits.
Charger labels show kW. Your electric bill and the calculator's energy estimate use kWh.