Sadly no heat pump on a 2019 M3; no way to retrofit it either. A companies offers battery insulation solutions —but I don't know if I trust a solution that alt

Sadly no heat pump on a 2019 M3; no way to retrofit it either. A companies offers battery insulation solutions —but I don't know if I trust a solution that alters the heat transmission properties of a battery. (The previous owner of my car had a heated garage but that might be too extreme a solution for me.)