AC charging relies on an on-board charger inside an electric vehicle to charge the battery. For electric vehicles such as school buses, the on-board charger is usually 19.2kW. In order to provide 19.2kW of power, it requires 80amps of capacity with 240V (80amps x 240volts = 19,200 watts). It’s still possible to charge a bus with lower voltage or a lower-rated charging station, but it will take longer to charge the bus.
DC charging can be a fast way to charge large electric vehicles including electric school buses. The charging stations can be designed for different-sized vehicles depending on their power ratings. Nuvve offers a 60kW DC option because it is a good balance of size, cost, and charge time for heavy-duty vehicles.
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