[FKHeath]

Interesting question and great info! I have a 2016 Hybrid and have noticed of course the on/off behavior. My brother has a '21 Rav4 Prime and I *believe that one can for sure do the A/C for quite a while without the ICE turning on, and maybe run the heater as well?

The Primes have a heat pump, but it is a complicated system that can also use ICE heat.