All Proterra buses use the SAE J1772 CCS (IEC Type 1) standard for plug-in charging, and newer models of Proterra Catalyst vehicles in the US will now be fully compatible with the emerging SAE J3105 standard for overhead charging.
The company is introducing a new suite of high power DC chargers that comply with these standards. The three new Proterra Power Control Systems range from 60kW-500kW and are compatible with J1772 CCS plug-in as well as J3105 inverted and roof-mounted overhead charging systems. The chargers will also use the de facto industry-standard for communication, Open Charge Point Protocol (OCPP 1.6). These charging systems are capable of bi-directional, vehicle-to-grid power flow (V2G), enabling the chargers to be smart-grid ready to maximize the energy management capability of an entire bus fleet.
Proterra's new charging systems can be used on current fleets and in the future as the power levels scale as infrastructure grows, both in-depot and on-route. The Proterra 60kW Power Control System is ideal for fleets with longer available charge times at the depot. Recharge time is approximately six hours for an E2 Catalyst utilizing a J1772-CCS plug-in connection. Fleets with high uptime requirements will benefit most from the Proterra 125kW Power Control System. Operators can simply plug in the charger to achieve a full charge in under three hours at the depot, with a standard E2 battery configuration. The 500kW Power Control System works best for fleets with extended operating hours and high mileage requirements, such as 24-hour circulators. This 500kW system delivers fast overhead charging on-route or at the depot, utilizing the J3105 overhead connection standard, and can recharge up to 38 miles in 10 minutes, depending on battery configuration.
New pantograph-style options will join Proterra's available charging solutions for overhead charging. Proterra is collaborating with Schunk Carbon Technology in Germany, a developer of overhead charging hardware, on the new systems.
Next: Schunk Carbon Technology