I've started inputting "fillups" for my Tesla Model 3 and noticed that the way other Model 3 owners are inputting fillups is resulting in incorrect MPG numbers (way too low). Fuelly requires miles, gallons, and cost as inputs. This is the way inputs should be calculated for correct EV efficiency (MPGe) calculations:
- Miles is straight from your vehicles trip meter.
- eGallons is (Wh/mi)*(miles)/33700. This is easy if your EV displays consumption in average Wh/mi and miles driven in your trip meter.
- Cost is (Wh/mi)*(miles)*($/kWh)/1000. Where Wh/mi is from in vehicle trip meter, miles is from in vehicle trip meter and $/kWh is your utility or charging station cost per kiliowatt hour.
With these inputs fuelly can correctly calculate MPGe for an EV and you will find it is the right order of magnitude to compare with other EPA numbers.
antrey 
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