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Proterra introduces new extended range battery pack for electric transit buses; up to 180 miles

Electric transitbus manufacturer Proterra Inc. has launched a new extended-range product line. With the new TerraVolt XR extended-range battery, Proterra buses can now be configured to travel up to 180 miles (290 km) between charges. This newest high energy density battery complements the existing TerraVolt FC fast-charge battery which has been extensively tested over nearly one million customer revenue miles.

These two lithium titanate fast charging battery packs are components of Proterra’s TerraFlex energy system and can be used interchangeably in the Catalyst vehicle platform. This system enables customers to select the right amount and type of energy storage to meet specific route requirements. Once customized, operators can reconfigure battery packs to meet evolving service needs. Both battery systems are compatible with Proterra’s on-route and in-depot chargers.

  • The fast-charge Catalyst FC is now available in configurations carrying between 53 kWh and 131 kWh of energy storage and can be fully recharged in under 10 minutes.

  • The extended-range Catalyst XR is now available in configurations carrying between 129 kWh and 321 kWh of energy storage and can be recharged in a little over an hour.

The Proterra buses feature a 220 kW peak permanent magnet drive motor and a Proterra 2-speed auto-shift EV transmission.



A city e-bus equipped with 321 kWh battery pack should be able to run a full shift and more without complete recharge or two (2) shifts with short end of route recharges.


If you were going to install end of route chargers then you're going to go for fast charge batteries. The higher energy extended range batteries would be more attractive for routes with no on-route recharging.

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