Boomer23
Well-known member
Roadburner440 said:I may need to figure another way of reading its electric consumption. I track that stuff through excel spread sheets that I use for my own purposes, and to show people the true cost of driving an EV. Having inaccurate data skew this would be bad.
The LEAF's in-car mi/kWh readings are thought to be accurate (despite the fact that there are two of them, and one is always 0.1 mi/kWh higher than the other because it apparently uses a different algorithm, go figure), but these readings are only battery-to-wheels. It's the Carwings data that is unreliable. You can guesstimate your wall-to-wheels figure by using a charging inefficiency factor of about 15% to 17% for Level 2 charging. But you seem like the same kind of guy that I am, and you want real measured data to put into your spreadsheet. For that you should consider something like a TED (The Energy Detective) or something like it.
I have a TED 5003 system installed in my main power panel. It has three measurement modules, called current transformers, and one of them is dedicated to my EVSE circuit so that I know how much power is being used to charge the car from the power panel. Using an Aerovironment Level 2 EVSE hard wired in my garage, I'm getting about 83% charging efficiency if I compare my charging power usage from the power panel to the battery-to-wheels measurement inside the LEAF.