The key technological innovation is a fully integrated thermal management system which cools and/or warms the battery, inverters (and any other electronics), an

The key technological innovation is a fully integrated thermal management system which cools and/or warms the battery, inverters (and any other electronics), and cabin. Ideally it should use a single heat pump (much much more efficient than resistance heaters), with fluid loops to transfer heat energy from where it is generated to where it can be used (or wasted) most efficiently. This is a large ask from a mechanical design perspective since it involves many separate teams and impacts many subassemblies. Software control is also fairly complicated. Most manufacturers have not opted for a fully integrated system (thus cannot transfer waste heat to where it might be best used) or have not incorporated a heat pump (and are really wasting a lot of energy on resistance heating), and pay the price in cold-weather range. Heat pumps are the obvious engineering solution, but integrating them with the rest of the vehicle systems is not straightforward due to quirks of heat pump performance. The Model 3 was the first Tesla model to use the integrated heat pump system, and only after selling for 3 years using a resistance heater. I guarantee Tesla knew about the heat pump approach but spent years getting to a productizable, performant solution. Cold weather range loss will be a reality for both ICE and EVs, but there are no physical reasons why the range loss can't be kept to a modest amount.