Miami-Dade relies on electric buses and charging systems


Miami-Dade County, Florida announced today that it has purchased 42 Proterra ZX5 + electric transit buses with a total battery storage capacity of 19 megawatt hours. The county also announced that it will install 75 Proterra chargers at three bus depots. Its first electric buses should be delivered in 2022.

Miami-Dade’s new buses and electric chargers

Its latest purchase brings the total number of Miami-Dade Proterra electric transit buses to 75.

Proterra, headquartered in Boston, designs and manufactures its products in the United States. The 40-foot ZX5 + buses with Duopower transmission that Miami-Dade has purchased have a capacity of 40 passengers and have the following specifications:

Total energy 450 kWh
Operational efficiency 1.7-2.4 kWh / mile
Operating range 163-232 miles
Top speed 65 mph
Acceleration 0-20 mph in 5.7 seconds,
20-50 mph in 12.8 seconds
Gradability 65 mph at 5%, 48 mph at 10%, 31.5 mph at 15%
Maximum score 27.5%
Power 550 peak, 338 continuous
Engine Two independent 205 kW motors
Gearbox 2-speed automatic shifting EV transmission
Unloaded weight 29,849 pounds
Maximum gross vehicle weight rating 43,650 pounds
Max plug-in charge rate at 200A 132 kW
Maximum overhead rate 330 kW
Air load 33 miles filled every 10 min, 2 hour estimated time from empty to full
Plug-in charging 2.9 hours estimated time from empty to full

The fleet charging installation project is one of the largest in North America. It includes three depot locations, each equipped with 25 120 kW chargers at each location, for a total of 3 megawatts (MW) at each site and 9 MW at all three sites.

Miami-Dade County Mayor Daniella Levine Cava said:

This is a big step forward in Miami-Dade County’s commitment to incorporate clean, renewable energy to protect our environment and provide better transportation options. With these new electric buses, Miami-Dade will lead the way with Florida’s largest sustainable transportation fleet and one of the largest in the country.

Taking Electek

China is by far the world leader in electric bus use, with more than 421,000 electric buses in circulation in 2021 and 1.32 million planned for 2025. In contrast, in 2020, there were around 650 electric buses in operation. service in the United States – but this number has increased and continues to grow rapidly, as demonstrated by Miami-Dade and many other American cities.

In May, Senate Majority Leader Chuck Schumer (D-NY) and Senator Sherrod Brown (D-OH) introduced the Clean Transit for America plan, which would provide $ 73 billion to replace the 70,000 transit buses mass transit and 85,000 coupes and transit vans in the United States. with clean energy vehicles.

Will Schumer and Brown’s transit plan prevail? We don’t know, as Congress continues to haggle over the many details of Biden’s massive infrastructure plan. We certainly hope so.

Either way, the US city and state government and manufacturers are gearing up and implementing the big shift to electric public transportation, as Miami-Dade is doing. But the United States really needs a lot of support from the federal government. Watch this place.

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