Hyundai Kona stumps me with 19.2KM/KWh (52Wh/KM) efficiency

My erstwhile hypermiling experiments were mostly each connected warm/sunny days and astir gave values of 16-17KM/KWh.

This is the aforesaid arsenic the Hyundai grounds was. So one had expected it to beryllium the maximum.
Hyundai Kona Electric Record

But precocious a abbreviated tally connected 1 of these acold days surpassed each of these astatine 19.2KM/KWh (52Wh/KM).

Now I bash not cognize what factors contributed to these values but pursuing were the conditions:

• Cool oregon alternatively accidental acold upwind astatine "25 deg C"
• No lights/wipers/radio - virtually nary electrical
• No AC
• No resetting of travel meter
• Proper circular trip.

With Kerala successful midst of monsoon's, my Kona had been moving astatine efficiencies of 12-13KM/KWh. So the acold clime is the lone contributing origin one could deliberation of.