MarkN
Well-known member
In the U.S. it will not be possible to force the range extender to engage, in order to comply with California Air Resources Board requirements, even on models sold outside of California. This makes the car less useful in mountainous terrain as the REx doesn't produce enough power for fast uphill travel with a depleted battery. The i3's navigation system and range map take topography into account, so the REx could be automatically turned on ahead of time to provide a battery power reserve for long, fast uphills based on the driver's chosen route.