I'm getting totally useless data on energy/cost from the Nissan Connect app. Is it just me or what? If not, since fixing it seems really simple for Nissan, how is it possible nobody has already pinpointed this in all the reviews?
The problems I have are twofold: main one is that it often states it has consumed much less energy then true. And the second one is that, even when it reports credible energy usage, it cheats on the cost.
Consider that I live in flatland and every day my trips start form home, go to school, work, market, etc and return home.
Now consider these values:
M: energy used by the motor, zero or positive
R: regenerated energy, also zero or positive
B: energy taken from the battery (usually positive, but could be occasionally negative if I regenerate more then I consume, for example if I just drive from the mountains to the valley).
So you have: M-R=B
My Nissan Connect app today shows these values for the February month:
Travel distance: 701km
Energy: 99kwh - split in 48kwh of consumed energy and 50.8 of regenerated energy
Cost 7.23 euro (I've set 0.15 euro as the cost_per_kWh)
Ok, so 100kWh for 700km is about credible. The problem is with the energy and cost display (see screenshot)
If we interpret "Energy" as B and "regenerated energy" as R, then "consumed energy" shown in the app is B-R which doesn't represent anything meaningful. The cost of course should be computed as B * cost_per_kWh, which is around 15 euro. Instead the app computes the cost as (B-R) *cost_per_kWh which means nothing and is clearly much lower, only 7.23 euro, misleading you into thinking your Leaf is very cheap.
Second problem is that, switching to daily report, several days show zero energy consumption as eg.
travel distance: 45km
Energy: 3.91 kWh - split in 0 kWh "consumed energy" and 3.91kWh of "regenerated energy"
Since the app uses "consumed energy" for the cost, it shows cost = 0 !!!
So it is saying I've traveled 45km at zero cost. Which is clearly far from true. Even the car itself reports about 7 kWh consumed from the battery. I mean, even if we hypothesize that the motor has consumed ONLY 3.91kWh for 45km, it is impossible that the car has both consumed 3.91kWh and also regenerated 3.91kWh (in my flat area where I start from home and return home) - besides it would also be a very peculiar coincidence. And indeed the in-car display says it has consumed around 17% of the battery - not 0%.