eurosteve wrote:As reported above, the manual states to "discharge the high voltage battery until two or three bars remain on the battery range indicator." Can anyone tell me approximately what SOC this equates to? It sounds very low. Also, can anyone tell me if the car has the ability to turn something on to warm up the battery if it gets too cold - even if it isn't plugged in?
2 or 3 bars would be between 11 and 19 percent SOC.
The car doesn't do any battery conditioning when SOC is less than 30%.
The problem is that the manual doesn't discuss what is the proper long-term winter storage, just what the proper long-term storage is, regardless of outside temperature. Battery conditioning appears to be mostly there to make sure the car is drivable when it's extremely cold or warm. If the car has been sitting all winter, the battery will need to be charged before it can be driven, anyways, and will get conditioned as part of being charged.
Someone on another forum suggested a way to keep the car plugged in for long-ish term storage, but still have battery conditioning available to keep the battery happy and the 12V battery maintained: You edit the electric rate schedule so that off-peak is only available from 2am to 2:15am, and you tell the car it can only charge during that short window. However, over a 5-month period, there's enough cumulative time to fully charge the car. I don't think shortening it to a 5-minute window would help, either.