Nissan Leaf

Thanks for the Dongle links, I have one ordered now. Someone above mentioned the best way of using it, should I empty/fully charge the battery before getting a reading?

The Hx on our former 2018 at 1349km was 109.35%. There is a direct correlation on the Hx vs SOH as the numbers were Hx=98.96% and SOH=91.15% at 3y old at 74k km before we sold the car.

Nissan changed the calculation on the 30 kWh batteries to allow for higher SOH displayed, thus managing the warranty work, but I suspect this won't be necessary with the 40 kWh modules. Our other Nissan with the original BMS firmware had a Hx=53.78% and SOH of 56.23%, but latter then jumped to 79% after the upgrade. That was when the car 92038 km and was 6.5 years old at the time. I don't think a 40 kWh would have such brutal degradation. Also I don't know what the Hx of them was when new as we bought that car second hand.

So the 40 kWh battery seems much better than the 30 kWh, but they suffer from module faults at the rear middle section if the car is DC charged a lot.

That's almost identical to my 2017 30kwh leaf too. Mine drops by about .2% hx and soh .1% per month.

No but Leaf Spy Pro can push metrics to HA

Following the advice on here I got my new Dongle connected to Leaf Spy Pro this evening, and here's my graph. The car is just over 4 years old, Leaf L40 with 83,426km on the clock.

From what I have read online, there doesn't seem to be any worrying figures on my graph, but I am no expert. Any thoughts on it? Thanks…

how you know when the change the 12 v battery?

mine says 13.04v -0.42A
what does it mean?

If it sits below 12.5v its time to take notice, below 12v is almost guaranteed to start causing trouble. My first indication the battery needed replacement was that the smart key started playing up, and it would sit around 12v. It would think it wasn't present when driving. The -0.42A I think is the load on the 12v battery if the 13.04v is the resting voltage you should be ok.

I get about 165km range (GOM). I do charge to 80-90% at 2.2kw as that is the only option as the 6kw charge option was an optional choice when buying the car new. That's disgraceful by Nissan on a top spec Tekna. There must be a lower spec model that has no charger with that logic😀.€40,000 for a new one. Not a chance, in my opinion.

Thanks a lot!

Is changing the 12V battery something I can do, or does it have to go into a garage? If I can do it, does any "standard" 12V car battery do?

Thanks again, I will definitely look into doing it myself, I do like a challenge (as long as it's not too much of a challenge! 😊)