eurosteve wrote:Ok, so it looks like whoever is monitoring this thread from Chevrolet isn't able to chime in on the topic of winter storage. I did buy the Bolt and I've had it for a few months if that help Chevrolet decide to respond to this thread. After researching as best I can on the internet, I've decided to leave the car at a higher SOC (State of Charge) than the manual suggests, because 2 bars (as recommended in the manual) is only a 10% SOC. I've decided to leave the car at around 30%. What I've read suggests that the battery should always be kept between 30 and 80% if possible and 10% is awfully low. Any help from Chevrolet on this topic of storing the Bolt in cold weather for extended periods is greatly appreciated.
There is a difference between usable and actual pack capacity. The 60 kWh usable on the Bolt does not include the buffer at the bottom and top of the cell when SOC indicates 100%. (0% is NOT completely discharged, nor is 100% completely charged). GM/LG have not released the specs on the cells used, but it is very likely that the actual pack capacity is between 65 and 70 kWh.
I may be in the minority, but I believe that GM and LG know the capabilities, strengths and weaknesses of the battery pack and base their recommendations on those characteristics and not from some "rule of thumb" generalizations garnered from from old data on different battery chemistries.
Chevrolet has given you their recommendations for storing the Bolt in the manual. I doubt very much that a response on a forum would recommend anything different.
It probably won't harm the battery (at least not significantly) to store it at a slightly higher than recommended SOC, so if it makes you feel better, go for it.