Proterra, a designer and manufacturer of zero-emission vehicles, recently unveiled its Catalyst E2 electric bus series. The bus’s 660kWh battery pack, combined with its carbon fiber reinforced polymer (CFRP) body, has allowed it to achieve a range of up to 350 miles in a single charge. In total, the bus weighs just shy of 15 tons.

“Proterra’s primary goal has always been to create a purpose-built, high-performance electric vehicle that can serve every single transit route in the United States. Today, with the unveiling of the Catalyst E2 Series, that goal has been achieved,” said Ryan Popple, CEO of Proterra. “The question is no longer who will be an early adopter of this technology, but rather who will be the last to commit to a future of clean, efficient, and sustainable mobility. With the Catalyst E2 offering a no-compromise replacement for all fossil fuel buses, battery-electric vehicles have now broken down the final barrier to widespread market adoption.”

Last month, an E2 series vehicle achieved a new milestone at Michelin’s Laurens Proving Grounds where it logged more than 600 miles on a single charge under test conditions. It has a nominal range of 194 – 350 miles, which means the Catalyst E2 bus series is capable of serving the full daily mileage needs of nearly every U.S. mass transit route on a single charge and offers the transit industry the first direct replacement for fossil-fueled transit vehicles.

The Catalyst E2 follows in the footsteps of another bus made with CFRP, the Catalyst XR, which last year drove 258 miles on a single charge. GFRP is utilized in many areas of the main body of the Catalyst XR, with CFRP selectively employed in areas where the bus needs a high strength-to-weight ratio, such as the A-pillars, areas surrounding the window cutouts and some of the lower body structures. The composite parts were made with vacuum assisted resin transfer molding (VARTM). Each structure is built with an upper and lower mold, which are fabricated and then bonded together.

To see the Catalyst E2 in action, click here.