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I logged four recent L2 charging sessions and looked at the correlation between temperature and charge rate.
Cabin temperature explains 72% of the variance in Level 2 charging speed. Correlation with battery temperature is worse (63%; not shown).
Correleation is not necessarily causation so we don't know whether the car reads the cabin temperature and directly applies some formula to throttle charging speed or whether it's something correlated with cabin temp.
The rest of the variance is probably due to cell balancing and other factors, including statistical noise.
Cabin temperature explains 72% of the variance in Level 2 charging speed. Correlation with battery temperature is worse (63%; not shown).
Correleation is not necessarily causation so we don't know whether the car reads the cabin temperature and directly applies some formula to throttle charging speed or whether it's something correlated with cabin temp.
The rest of the variance is probably due to cell balancing and other factors, including statistical noise.