calverajarda wrote:Which meter is more accurate for energy/distance? on board meter or LeafSpy kw/km meter? I mean LeafSpy. But both showing consmuption with all accesory, yes?
How granular do you want the data? Do you need a separate readout for each trip/day, or is a month long summary (possibly without many digits of precision) acceptable?
I think in general LeafSpy will give you more accurate (and precise) readings, especially if you are trying to track at the trip or daily level. But you would need to remember to run it each and every time if you are looking to gather data on a larger scale (like a month). For that, I think relying on the car's display is probably adequate. My routine is as follows:
On the first day of the month I note the various parameters in the driver's display (averge mi/kWh, distance, average mph, driving time) and reset all those. Taken across a whole year you can see variations due to seasons, and even the effect of battery degradation and things like different tires, etc.
Each time I charge the car I reset the center console meter. This was actually more useful in my old 2012 LEAF in that it was basically a daily activity, and the center console displayed the daily efficiency as a number--in my 2016 it only shows as a bar graph, plus I don't need to charge my 2016 daily, so the information it conveys is not as useful anyway. The idea behind this is that I could check daily efficiency and compare to the monthly running total and surrounding days, correlating with weather conditions and driving patterns (highway vs. surface streets).
The resultant data is not precise. You only get down to the 0.1 mi/kWh level, but big picture wise, this is probably sufficient accuracy for what I was using the data for.
If for some reason I needed highly accurate data for a particular trip, I would have no qualms using LeafSpy for that.
If you need highly accurate data for some other reason (you are trying to calculate exact costs of electricity), then you probably want to take a different approach altogether and put a meter on your EVSE so you can take into account charger losses as well.