When 7kW can be enough
For vehicles parked through a working day or overnight, managed 7kW charging may deliver the required energy with lower infrastructure demands. The correct answer depends on mileage and dwell time.
When 22kW may help
Three-phase 22kW AC charging can benefit compatible vehicles with shorter stays or higher daily energy needs. Many vehicles accept less than 22kW AC, so check the expected fleet.
Compare the complete design
Ask installers to show assumed vehicle capability, usable power per socket under load management, electrical works, future expansion and the cost difference—not only the charger nameplate rating.