Each vehicle seems to be slightly different. Some have trip meters that that will display the total kWh, some have a meter that resets after a full charge, some have an online dashboard that displays monthly, weekly, and lifetime consumption. Quite a few people do use a kWh meter outside of the vehicle as well.
I would encourage a recording method, and calculation, that supports MPGe as defined by the EPA, which is from the plug rather than from the battery. An individual vehicle profile would help address the challenge, and allow fuelly users to select their kWh metering method, wall or battery.
I would also suggest allowing the option of "not recording kWh", set as the default. When set to record kWh, their badges could display "MPGe" rather than "MPG".
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I am currently using the monthly kWh number reported on MyVolt.com for convenience. I have entered mid-month updates, but I will delete those entries and replace them with the monthly total.
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