Correct Rounding Error in calculating actual Supercharging costs

Dave Carroll 4 years ago 0

It appears the fractional "Used kWh" amount is included by TeslaFi in multiplying by cost per kWh, but Tesla only charges by the whole kWh, meaning a rounding function might be needed.

Real life example:

Supercharger cost (overridden in the properties of the location): $.23 / kWh

Used kWh: 36.2

TeslaFi calculated cost: $8.33

Actual bill from Tesla: 36 kWh @ $.23 = $8.28

Further investigation shows they round to the nearest whole kWh amount.