Renault Megane efficiency and charging speed are too optimistic

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/add-a-vehicle/renault-megane-efficiency-and-charging-speed-are-too-optimistic/
———————————————————————————
ABRP seems to have too-good charging curves and efficiency data for Megane E-tech, and probably Nissan Ariya too.

I have Renault Megane E-tech EV60 (Techno).

It is really bad in low temperatures. During a trip (mostly highway @70mph) when outside temp was 0°C-9°C it averaged 2.3-2.7 mi/kWh. ABRP assumes 3.91mi/kWh which is completely unrealistic for this car. I wouldn't expect that even in a good weather.

ABRP also overestimates charging speed. In 7°C-9°C, when using built-in satnav (hopefully preconditions the battery), I've only seen it reach 87kW charging speed for 7 minutes when it was below 40%. Then it drops to 54kW until 60%, and 41kW until 75%. ABRP assumes average close to 80kW for entire charge duration, which is again not realistic for this car. The typical average is below 50kW (based on data reported by the dispenser, the car itself doesn't show such details).