Activity may also indicate "BMS" check depending on SOC of the HV pack, this may be a variable occurrence depending on software/firmware version. Do you run BM2 or monitor?My little green/yellow? light on the front is coming on more than usual. The temp may have something to do with it or I may have a weakening 12V battery. It is not not 'winter cold' here yet, usually between -1 and +8. I see no impact on driving. The voltage is 12.1V while resting and 14.7/14.8V when the battery is being recharged by the HV pack.
If it helps, mine has come on pretty regular since the last update, regardless of ambient temp.