Rounding.237 looks like an EPA rated consumption number. If it is then you must adjust for the efficiency. OTOH the EPA wall number for the R1T is 48 kWh/100 miles which is 480 Wh/mi (whereas you have 481). If 481 is rated consumption where did you get that number and how can it be better than the wall number?
Actual numbers are 48.0759 for the R1T and 48.6142 for the R1S.
Hence the 48 and 49 kWh/100 miles in the EPA charts.