So I'm seeing this trend and feel like its pretty confirmed by others, that during the spring/summer the CAC rises significantly in the spring/summer and tends to drop significantly in the fall/winter. Any idea why this happens? My pack 3-4 days ago was sitting at 155.17 CAC. Temps started rising in the mid-80s where I'm at in California from the low to mid-70s where we'd been hugging. My return home trip the pack temps when ambient temps were in the 70's or below would be anywhere from 26C to 28C. Withing the past 4 days the pack temps increased to 32C where I initiate the cool-down cycle as soon as I arrive home. During the rise of temps and before I had to shoot off before a full std. mode charge was completed and didn't allow balancing to occur, 2 days in a row. I noticed that my pack was staying out of balance and was taking more than 1 hour to balance, so I allowed 4 hours extra to balance on 3 consecutive days. That seemed a little odd, since I've never had my pack take so long to balance (other than when it was replaced and rebalanced). I then looked at the CAC and saw it was climbing, so the longer balancing process started to make sense now given I had balanced 2 refurbished Roadster packs and learned their behavior. The odd thing here, on the two times I balanced the new packs the packs indicated they were fully balanced. But the CAC still showed significant incremental increases. The odd observation I'm seeing here is that there appeared to be a correlation between the pack telling / showing me its out of balance, also the time it was taking to balance, and then the increase of CAC which happened in parallel. Right now, 3-4 days later my pack is at 156.20 CAC. During the fall/winter I could see my CAC decreasing where it landed around the 155.17 area. It popped up a little, but nothing major and not a huge increase in a short period of time.