I'm starting this thread new rather than post in the existing "Cold Weather Regen" thread, because I'm explicitly discussing the accessory draw here. We all know that the pack can't accept significant charge if it's too cold. I often will have regen limited in the cold, and occasionally it will be disabled altogether. Yesterday was such a day for me (along with the first time I've ever seen the dash "range snowflake") where, after sitting out all night in nearly 0 degree (F) weather, the battery was completely cold-soaked and regen was disabled. As I began driving, my accessory power draw was somewhere on the order of 10kW. This was cabin heater on, both seat warmers on full, and the pack heating obviously engaged. I determined the draw based on the the dash gauge when the car was stopped at an intersection. So, we know the battery pack can't accept charge when it's too cold. My question is: Why can't the car offset the current draw for accessories with regen power, even if it doesn't provide current to the pack? Even 10kW of regen helps slow the car when you are approaching an intersection. And when the pack heaters are running full-bore it would be nice to recover as much energy as possible. My guess is that the accessory draw can be instantly variable: The heaters could go off at any time, thus forcing regen to instantly disable during deceleration, thus causing a safety concern. Of course, regen can instantly disable when traction control detects a slip too, causing the same safety concern... but in that circumstance there may be little other choice, and halting regen may be the lesser of two evils. Thoughts?