I bought a leaf last month and the soh has dipped 5%. See leaf spy images. Should I get the battery looked at? This is very concerning. I have enabled long life and only charge at night to 80%. My daily commute is only 14 miles. https://photos.app.goo.gl/jK2fTDyqGqaPinXc7
What Model year is your Leaf?
The picture you show only shows a 2.8% SOH drop. Small fluctuations are totally normal and not worth worrying about. A 5% drop, however, would be a bit larger. Things that can impact SOH: Changes to charging (using L1 instead of L2 or L3 charging, driving style (local vs highway), etc). You are likely charging and driving the car differently from the previous owner, which could account for a few percent of the SOH.--This section may no longer be relevant. I posted in response to SageBrush's statement about a BMS reset --
A BMS reset is where the car's computer is tricked into thinking the battery is at full health when the battery is actually worn out. It's a trick some unscrupulous people will use to make a car with a bad battery look like it's 100% healthy.
It would be very strange for someone to do a BMS reset and then let the car get to 67% SOH before selling it. I don't think this is a BMS reset--something else may be going on. I wonder if one or more battery cells has gone bad and is influencing the SOH calculation.--This section may no longer be relevant. I posted in response to SageBrush's statement about a BMS reset --
Do you have Leafspy? Can you post a picture of the battery cell voltages? It should look like this.http://www.wind-works.org/cms/uploads/R ... 01.jpg.jpg
If you can do that, can you drive your car to the very low battery warning (VLBW, where the car shows --- miles remaining), and then grab the graph? Be sure to stay close to your house when trying to drain the battery if you've never gone that low before as failing batteries can potentially shut down with little warning. One way to safely drain the battery is to crank the heat to maximum in your driveway until the miles left on the dashboard hits ---.
Once you get the voltage at VLBW, be sure to immediately shut down the car and charge it. You don't want to leave the car at a low battery for very long.