2024 Battery SOH dropping too fast.

[Mstanlake]

Bought a new 2024 SV Plus a year ago, the battery at new was just below 99%. The car has only had 2 Quick Charges, 122 L1/L2 and has always been maintained between 40% and 80%. Just checked the SOH after one year and it's 93.4%. That's a 5.6% drop in one year. the Hx is 81.61% and cell variation is 16mV.
This is our fourth Leaf and I have never seen more than 1.5% SOH annual drop in any of the others.
Has anyone seen this kind of drop in a new Leaf. I suspect this battery may have a problem.
Thanks.

 

[LeftieBiker]

A drop of about 5% the first year is very common. I've seen it with my/our cars. It should stabilize at a smaller annual drop.

 

[DaveinOlyWA]

Bought a new 2024 SV Plus a year ago, the battery at new was just below 99%. The car has only had 2 Quick Charges, 122 L1/L2 and has always been maintained between 40% and 80%. Just checked the SOH after one year and it's 93.4%. That's a 5.6% drop in one year. the Hx is 81.61% and cell variation is 16mV.
This is our fourth Leaf and I have never seen more than 1.5% SOH annual drop in any of the others.
Has anyone seen this kind of drop in a new Leaf. I suspect this battery may have a problem.
Thanks.

Quite normal.
Question; you maintain SOC between 40 and 80%. Why not 30 to 70%?
How often do you charge?
What is your typical daily need (outliers can be omitted)

FYI; your pack hasn't lost that much. The ONLY thing you actually know is what the BMS has done. It has restricted up to 5.6% of your capacity. Some/all of that capacity is MUCH more than likely in a hidden reserve.

Your 2nd year;

You will see a drop...about half of year one. Still alarming...still not realistic in terms of long term degradation.

Year 3;
Towards the end of year 2; your pack will magically regain capacity. (If you didn't know...in the "real" World, this is not physically possible)
But if you only check your stats annually, you will find an "acceptable" loss of around 1%.

Year 4; Well, now you are a bit confused. Its seems like degradation took the year off. You are now frantically searching for that year 3 screenshot to verify your brain cells are not prematurely aging.

Year 5; You don't know what your battery stats are. The reality is monitoring it is like waiting for that fresh coat of white paint to fade in the Sun....BORING!

 

[cdherman]

Bought a new 2024 SV Plus a year ago, the battery at new was just below 99%. The car has only had 2 Quick Charges, 122 L1/L2 and has always been maintained between 40% and 80%. Just checked the SOH after one year and it's 93.4%. That's a 5.6% drop in one year. the Hx is 81.61% and cell variation is 16mV.
This is our fourth Leaf and I have never seen more than 1.5% SOH annual drop in any of the others.
Has anyone seen this kind of drop in a new Leaf. I suspect this battery may have a problem.
Thanks.

If your other Leaf's only dropped 1.5% per year, then you did not purchase new. Pretty much any new lithium battery loses capacity in the beginning. Some manufacturers hide this by building in larger buffers. Some didn't (like early Leafs). The real issue is will the capacity loss slow and flatten or just keep falling. Sounds like in your other Leafs, it was into the flat part of the curve. Some of us experienced what happens when they do NOT flatten. I got a new 40kwh bat for my 2016. Others not as lucky.

 

[DougWantsALeaf]

Here are our 2 Leaf Pluses, both 2019s. The Red one is mainly DC charged and the Blue one mainly AC charged.