Covered previously in the thread.Could someone explain why the blame is being put against the heat pump? apologies if it's in one of the posted videos as I've not watched them.
The sole purpose of a heat pump is to reduce the current draw for heating (and provide cooling). In uk weather (so +5/10 degrees around now) I'd still expect around a 2x return on energy-in to heat-out. So if anything the current draw on running a resistive heater and/or inefficiently running the motors on a 2019 model should have more of an impact on available power to the motors than a heat pump system on the new cars. What am I missing?
It is thought the heat pump scavenges heat from the battery for cabin heating; battery performance then drops as we know batteries perform better when warm.
In the tests, the performance on the P dropped significantly as battery temps decreased from 28c to 8c.
With battery temp low, the battery then either struggles and/or limits max power output.
You can see this happening in the data from the spreadsheets that Bjorn made.
In the same tests, a 2019 P with no heat pump - battery temps are stable.
But interestingly the 2021 LR with heat pump also has battery temp reduce but the battery manages to hold peak power output both higher and more reliably.