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Discussion Starter #1
Hi, I'm looking to buy my first Leaf, aiming for a 17 plate, 30kWh Tekna model. One I've taken a slight interest in has just over 30k miles but is showing only 11 bars for the battery, which I understand is now less than 85% capacity. Should I walk away from this one?
 

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It's certainly unusual considering the age and mileage. I've sold a few 30kWh ex-taxis with some serious miles and some with over 1000 rapid charges all with 12 bars. It could point to a problematic cell (Leaf Spy can answer that one) or abuse of the pack (being left for prolonged periods at 100% SOC etc). That said, you still have a good while on the 8 year 100k warranty so it shouldn't be a deal-breaker if the rest of the car is good and the price is right.
 

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Battery condition has to be part of your value judgment. So you could maybe pay a lower price for a car in sub optimal condition, or look for one in better condition at a more average valuation.

You might also check if it’s had a firmware update. There was a version of the software that made batteries appear worse than they really were.

Either way a 2017 Leaf that has lost a battery bar sounds like it’s not been looked after particularly well, whether that’s lack of servicing or lack of care in use.
 

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LeafSpy is your friend. Losing a battery bar can be a temporary reduction in SoH below 85% but it can subsequently recover by a few %. Coupled with the BMS update which can be worth up to 4% it MAY not be so bad, but you cannot tell without checking. Alternatively it may already have the BMS update and be just about to lose another bar (a further 6.5% so 78.5%) - but it is all conjecture.
Either way a 2017 Leaf that has lost a battery bar sounds like it’s not been looked after particularly well, whether that’s lack of servicing or lack of care in use.
It is not servicing (or lack of) that is responsible for damaging batteries, but being left at high states of charge for long periods and/or high temperatures which in this country means rapid charging after hard use (high motorway speeds or repeated acceleration). Unfortunately you are unlikely to get proof of this from the vendor so check the details on LeafSpy.
 

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Discussion Starter #7
Hey, thanks for all the replies. I'll check out Leafspy and see what I get. I'll push them to see if they can use Leafspy as one of the salesmen was described as an EV specialist(!)
I'll get them to check the battery firmware for me, I understand that they need to look for a 4A at the end for it to be the faulty one, updated to 4C.
It's up for under 13k, which seems good and makes me think they know it's got something wrong with it.
 

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LeafSpy is your friend. Losing a battery bar can be a temporary reduction in SoH below 85% but it can subsequently recover by a few %. Coupled with the BMS update which can be worth up to 4% it MAY not be so bad, but you cannot tell without checking. Alternatively it may already have the BMS update and be just about to lose another bar (a further 6.5% so 78.5%) - but it is all conjecture.

It is not servicing (or lack of) that is responsible for damaging batteries, but being left at high states of charge for long periods and/or high temperatures which in this country means rapid charging after hard use (high motorway speeds or repeated acceleration). Unfortunately you are unlikely to get proof of this from the vendor so check the details on LeafSpy.
Yes indeed thanks, not what I meant.
I wasn’t meaning to connect servicing with degradation. I was meaning if it needed the update and it hadn’t been done when I said lack of servicing.

That’s perhaps unfair on previous owner on reflection - it’s not necessarily easy to get Nissan to update, or even to know if your car needs an update. Would not reflect well on the dealer though.
 

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I'll push them to see if they can use Leafspy as one of the salesmen was described as an EV specialist(!)
Nissan do not recognize LEAFSpy despite it just presenting their data.
AKA: been on a half-day course on EV's. Don't own, drive or have actual experience of EV's beyond a few test drives.
That much? :rolleyes: At a Peugeot dealer recently their specialist had done an online course - he had never even driven one let alone lived with one or owned it. Opening the bonnet on their yet to be driven demonstrator he couldn't point to any of the components to explain them, and couldn't plug in the charge lead. Fortunately when I got a test drive I didn't like the car so had to go no further with them.
 

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Marcus as you know I bought my Leaf last weekend, and have been delighted with it - more so than any other car I have owned!

I have also been obsessing about LeafSpy readings as did not use it prior to buying and initially when I got home was sad to discover my car had a SOH of 84.88, so I really thought I had a dud, however its improved since I have been stretching its battery to and from work this week (past owners were an older couple who did 16,000 miles over 3 years) so I felt it needed some use before I got a more truer reading.

Since then I have been obsessing with leaf spy - reading the manual, any forum about battery degradation, SOH, AHr, etc etc etc and I got to the conclusion that I was over thinking everything.

At the end of the day I had to draw a line somewhere, I do not have the time nor inclination of travelling all over the UK with a LeafSpy dongle to try and find the "perfect" Leaf. Actually knowing now that the SOH can change so much, be affected by a reset, and increased with rapid charging, who knows what a true SOH actually is anyway?

I could just have easily bought one with a SOH in the 90's than had it drop because say the last owner had just been on a long trip with multiple rapids etc.

Unfortunalty I do have a concern about 2 weak cells so Nissan are looking at my car next week, but again I don't know if there will ever be a perfect car. I have 5 years left of my battery warranty and a car that has reduced my weekly fuel cost from £70 + £15 monthly road tax to about £10 a week all in!

Remember to do the calculation for the costs you will save - for me if I keep the car for about 4 years it then owes me practically nothing!
 

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Hi, I'm looking to buy my first Leaf, aiming for a 17 plate, 30kWh Tekna model. One I've taken a slight interest in has just over 30k miles but is showing only 11 bars for the battery, which I understand is now less than 85% capacity. Should I walk away from this one?
Walk away. There are plenty with 12 bars around even before you use Leaf spy on them. For instance, you could have my Gunmetal Grey 17 plate Tekna, less than 25,000 miles and with a 6.6kW charge rectifier (important if you want to make the most of Octopus Go tariff) for 13,500. Mot'd. If you're interested I'm on the Welsh borders, and I have to decide before 15 March.
 

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Discussion Starter #13
Walk away. There are plenty with 12 bars around even before you use Leaf spy on them. For instance, you could have my Gunmetal Grey 17 plate Tekna, less than 25,000 miles and with a 6.6kW charge rectifier (important if you want to make the most of Octopus Go tariff) for 13,500. Mot'd. If you're interested I'm on the Welsh borders, and I have to decide before 15 March.
Hi David, this might well be interesting to me. I'm based just outside Portsmouth, so where about's on the Welsh boarder are you? What's the condition of the car?
 

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The difference between the two batteries may be minimal or significant - you cannot tell with the blunt measurement of the bars, particularly on the first one. You need to get a LeafSpy reading or just rely on the Nissan guarantee.
Edited to add that there are a number of LEAF owners in the area who could take a reading if the vendor is willing.
 
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