As a matter of interest … This week it has been particularly cold here, 30 degrees below freezing. I started my truck on Sunday evening, drove to NYC and turned it off on Wednesday night when I plugged it into the mains at home to keep the engine warm, I then started it on Thursday morning and didn’t turn it off again until Friday afternoon back at home. Next week it will be running from Monday until I come home on Friday. I know my company monitor it.
Things could be better if this country got into the 21st century, cylinder preheaters have not been invented here yet 
If they had they would flatten the batteries because a 24 volt system for vehicles has also not been invented