Join Date: Mar 2018
Location: Northern Minnesota
The key here is the 7 degree outside temp. Also the 82 degree interior setting. If the battery had to do all the work to get the interior to 82 degrees, it would take most or all of the battery's capacity to do it. An electric heater is really almost a dead short.
Chrysler knows this, and programmed the van to heat the cabin (big volume, btw) with the gas engine. Once it is up to close to the set temp (82), it will start to use the electric more, and the gas less.
Now, 20 minute trips are about how long it is going to take to get all this done.
Had two Prius, and they were the same way. Physics is physics. At -20F, that prius engine would run from the get go until it and the cabin were to set temps. Then, it would use electric as much as it could, until either the charge went too low, or the cabin needed a boost, then the engine would run again.
Seems normal from my hybrid experience: Mileage drops in winter like a rock.
2018 Limited Gas