[RobertB]

It will never happen! AWD will always be available regardless of traction battery charge status. If you were to drive at 10mph for an extended period of time the ICE would cycle on and off as required to keep traction battery sufficiently charged.

 

[RobertB]

Rav 4 H has over double the HP of Prius C so running traction battery down should not be an issue. There is a video floating around where a guy towed a 2000lb trailer and experienced no issues.