@Peter Markert : You're not
@Peter Markert : You're not alone. Many TM3 LFP are complaining of the same thing. The heater even without heat pump is not the real cause. LFP batteries are operating very poorly in cold condititions. Lithium batteries in general have less capacity in winter but LFP is much worse than NMC or NCA. That's why the auto industry prefers nickel-cobalt batteries. In my opinion Tesla made a huge mistake by choosing low cost LFP for the TM3. Software updates will not "fix" the physics. I think it could have a LFP-gate when people will fully realize the cold weather issue.