Commercial Vehicles

Optimal EV and Proterra develop S1LF low-floor shuttle bus


Optimal Electric Vehicles and Proterra have just announced a new partnership to leverage Proterra’s battery technology and charging systems for the development of the industry’s first all-electric S1LF low-floor cutaway shuttle bus for the North American market.

What is immediately visually clear is that the S1LF integrates a quasi-purpose-built Ford E450 chassis platform. This has been optimised with the vehicle body to enable a low step-in height without kneeling the suspension enabling easy access for passengers of all (dis)abilities. The inclusive all-electric vehicle uses an ADA compliant entry ramp for paratransit operations with no reduction in carrying capacity. 

Optimal’s S1LF will make use of Proterra battery systems. The battery system powering the S1LF has a capactiy of 113 kWh and an all-electric, zero-emission drive system that enables more than 125 miles of driving range.

Optimal is expanding the accessibility of EV technology to more riders by introducing the industry’s first all-electric low-floor shuttle bus,” said Optimal COO Dan Daniels. “Proterra’s expertise and experience in battery-electric transit buses makes them an ideal and trusted partner as we design and deliver this new vehicle.”

The easy-access shuttle bus will premiere at the APTA EXPO 2021, and can be purchased from 2021 onwards. The S1LF is the first of a row of planned commercial electric vehicles from Optimal-EV for use in a variety of applications.

“Commercial urban fleets are an ideal use case for EV technology and we are excited to partner with Optimal to achieve a major milestone for the North American electric vehicle market,” said Proterra CEO Jack Allen.,


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