Like the Prius. I calculate also about 70% or less.
What’s the energy recoupment of hybrids? For example: A ‘bile with its ICE disabled on a hill coasts down charging an initially discharged battery. How far up the next hill will the battery drive the ‘bile?
My guess is v. ~ 60%. Typical gen.-motor, and battery max. efficiencies are ~ 90%. So ~ 0.9^3 or 73% Subtract drive and rolling friction (guesstimate) 60% total.