New to the forum. Apologies if this has been asked before. I have done a search through as a guest but don’t feel that I’ve found a topic that quite answers my query. Apologies, also, if this has been posted in the wrong forum.
I’m new to the EV market and considering a second hand Nissan Leaf. These aren’t that common in Perth, Western Australia. I’ve been discussing options with a dealer who has a number of Leaf’s cars brought in from Japan. Currently he is promoting, to myself, a 2015 Leaf, 92k on the odometer and 86% battery SoH [according to the Nissan LeafSpy output, here]. The only oddity is that it is being claimed that this is a new battery, replaced 8 – 10 months ago.
My first thought is that 14% degradation over 8 – 10 months is excessive, equating to 19% per annum! I suspect there is some miscommunication and that it is actually the original battery. If the original battery, this would be around 3.5% pa which seems more reasonable. Possibilities to me are, currently, for this battery is:
1. It is actually the original battery and there has been some confusion or mis-communication;
2. The battery has some inherent issues from the start, or;
3. Kilometres and number of charge events has more impact than I realise.
I have been discussing the various battery types [Canary, Wolf, Lizard etc.] and details [degradation rates etc.] but, I suspect, that the dealer has not come across these queries before. Therefore I thought it wise to get in contact with “specialists” to ensure my perception, opinion and facts are correct.
So, my questions are:
1. Is battery degradation logarithmic or more linear in nature? Is 19% pa over the first year actually excessive?
2. How does the quantity of charging events and km’s impact the degradation? It has done a few km’s and charges and, taking these into account, maybe the 19% is reasonable?
3. Can I tell the installation details for the battery from the LeafSpy output? Battery type [e.g. canary, lizard, wolf]? The code on the battery matches the code on his key ring although I didn’t match this, visually, to the car
4. Is basing the SoH on the range at 100% SoC reasonable [the above vehicle is stating 150km]. Based on my research and this forum, this is an estimate only and not as reliable as the LeafSpy output.
I am being offered a five year, unlimited km warranty but would like to avoid having to use it [means I’ve got a good car!]. It also avoids all the hassle of trying to provide whether a battery is faulty to begin with, what is fair degradation etc.
Thanks all and anyone for assistance.