Arian, mitsu's are built tough. It will last. But my question is this. You live in a Nordic country as I do. How many - 30c days have you experienced in the last 5 years? That will tell the tale if you can't charge it at night
hmm its -20 to -30 for about 2-3 months of the year here usually. Time will tell. Ofcourse My Outlander isnt new to begin with, i wouldnt be able to afford one new. i definitely notice it getting finicky at those temps and the battery has noticably deteriorated since i have had it. By alot. Cold or age, hard to say. But compared to my old volvo XC70 or V70 i cant say the outlander is the dream car in this winter wonderland. The old Volvo could sit out in a pile of snow for 3 weeks and just start right up and force its way out trough terrain it was never meant for. My outlander simply has to be rescued after a few days like that.
none of that directly relates to the battery heating tho. Twice i have come out in the morning on a day when your breath turns to snow (thats a thing) to find my car plugged in but entirely unresponsive, almost like it just refuses to keep charging and just lets itself die when it gets too cold too fast