jadnashuanh
Well-known member
Preconditioning is only useful for comfort if you are not connected to an EVSE. If you ARE connected to an EVSE, the energy used to cool the car would be replaced by the EVSE, and you'd leave with a full battery AND a cool (or warm, depending on the season) vehicle. But, by preconditioning, while you are in the vehicle, you may be comfortable with the a/c in 'normal' mode, verses max, and save some energy in the process while still being comfortable. Once everything in the car gets heat soaked, having just the air temp cool won't necessarily make you comfortable as heat will still radiate from things like the dash and the seats.
In the cold, I've seen my EVSE drawing 20A to warm both the batteries and the cabin up. If you're not connected to the grid, that would be coming out of the batteries. It's not a big a load with a/c though. Now, if you set a departure time and are not connected to the grid via an EVSE, it will only precondition the cabin, and then, only if you've checked that box. Assuming you have a phone with the remote app on it, it only takes a moment to turn on preconditioning. Even doing it as you get ready to leave the building can help a little.
When you did that 42-miles, what was the SOC? The estimated range to empty is based on the last 18-miles, and if most of that was drawing lots of power to cool the car and not moving, your range will be estimated to be much lower than if you took a longer trip or didn't let things return to ambient in between.
In the cold, I've seen my EVSE drawing 20A to warm both the batteries and the cabin up. If you're not connected to the grid, that would be coming out of the batteries. It's not a big a load with a/c though. Now, if you set a departure time and are not connected to the grid via an EVSE, it will only precondition the cabin, and then, only if you've checked that box. Assuming you have a phone with the remote app on it, it only takes a moment to turn on preconditioning. Even doing it as you get ready to leave the building can help a little.
When you did that 42-miles, what was the SOC? The estimated range to empty is based on the last 18-miles, and if most of that was drawing lots of power to cool the car and not moving, your range will be estimated to be much lower than if you took a longer trip or didn't let things return to ambient in between.