2018 Leaf SL 40kWh Battery Stats

[Falcon73]

Let's see if I can post an image here. This board doesn't appear to have its own image server?

How do these look? From LeafSpy.

Let's see.

SOH: 79.76%
Hx: 56.08%
odo: 39,186 miles (says km here but it's miles)
6 QC's
2442 L1/L2s

[LeftieBiker]

I'd say that the SOH and cell voltage differential are on the less good side of "average". Not actually Bad, but not very good, either. Hot climate?

[cwerdna]

You mean kWh? Battery capacity is measured in kWh, not kW.

[SageBrush]

Near on 6% - 7% capacity loss a year. That is bad

[Falcon73]

I'd say that the SOH and cell voltage differential are on the less good side of "average". Not actually Bad, but not very good, either. Hot climate?

Originally from Mesa, AZ and now in SoCal, so yes.

[Falcon73]

You mean kWh? Battery capacity is measured in kWh, not kW.

Yes, sorry. I fixed the main but it doesn't seem to fix replies.

[Falcon73]

Near on 6% - 7% capacity loss a year. That is bad

Ok thanks. I'm avoiding charging it to 100% but Nissan doesn't make it easy to charge slower or to a lower cap. Annoying coming from other cars where this is routine. Also, trying to avoid DC Fast Charging. I also prefer L1 home charging for it.

Also, how problematic is the 56% Hx state? Could it be related to the car being so warm inside even during cooler weather? W/o the AC on it's hard to keep it cool if over 65F outside.

I wonder how bad it needs to get before trying a warranty claim.

Any other ideas are welcome.

Thank you,

[SageBrush]

Also, how problematic is the 56% Hx state? Could it be related to the car being so warm inside even during cooler weather? W/o the AC on it's hard to keep it cool if over 65F outside.

The only advantage of L1 (120v charging) is that people have it if nothing better is available, like 240v charging.

I cannot imagine any connection between the Hx and the poor AC performance. Troubleshoot the A/C like other cars. I'll guess low refrigerant. Look for a leak if that is the problem.

I'll give you advice for your *next* battery (~ 2 years away): don't let it cook. Find shade, minimize DC fast charging, and DO NOT leave the car in a hot garage that is poorly ventilated. These LEAF battery packs do not have active thermal control, so we the owners either take steps to reduce heat loads or watch the battery degrade. Your pack is degrading at about 3x the rate of my car. Some of that might be explained by different climates and usage profile or initial battery quality, and some of it by how we treat the cars.

You are right that Nissan was foolish to take away the option to charge to less than 100% SoC. Search the forum for solutions, it has been discussed many times. The tl;dr version is to mimimize the time the pack spends at 100% SoC in general, and definitely when the pack temperature is over 5 bars (about 70 - 75F.)

[LeftieBiker]

The only advantage of L1 (120v charging) is that people have it if nothing better is available, like 240v charging.

L-1 charging is useful for keeping the battery warm in frigid weather: the very thing that is usually a disadvantage (very slow charging that takes many hours) becomes an advantage, by letting you keep the battery slightly warmer for many hours, and by providing power for the battery warmer.

[Falcon73]

I cannot imagine any connection between the Hx and the poor AC performance. Troubleshoot the A/C like other cars. I'll guess low refrigerant. Look for a leak if that is the problem.

The AC performance is fine. I'm just thinking the battery pack is generating more heat than it did when new. i.e. the battery pack is acting like another seat warmer.

I'll give you advice for your *next* battery (~ 2 years away): don't let it cook. Find shade, minimize DC fast charging, and DO NOT leave the car in a hot garage that is poorly ventilated. These LEAF battery packs do not have active thermal control, so we the owners either take steps to reduce heat loads or watch the battery degrade. Your pack is degrading at about 3x the rate of my car. Some of that might be explained by different climates and usage profile or initial battery quality, and some of it by how we treat the cars.

The tl;dr version is to minimize the time the pack spends at 100% SoC in general, and definitely when the pack temperature is over 5 bars (about 70 - 75F.)

Thank you. We are sending the Leaf to WA state, next month, where it will be garaged (here it's outside in the hot afternoon sun). It should be much happier up there. We may get another Leaf here in SoCal, but I don't know yet. The Ariya will likely be a better choice, depending on the price and how long we can wait to get a 2nd car again. My wife is off work until August or so.

So for my next question, as WA is out 2nd home what battery % should we leave it at for month-long+ storage? I've been using a WiFi SmartPlug to help keep it below 90% charge here and could do the same up there since the car itself doesn't have a limited.