A good way to check battery health?

Interesting to see that Dreamm (yellow) health percentages aroung 20K miles are lower than average, and that most cars (or submissions) are still <20K miles ;)
Not many cars which drive daily long distances. Or most submissions are from new drivers.
 
96.3 %
capacity 104.3 kWh
Remaining range 461 mi (21" Pirelli summer )
delivered 2022/9/29
~22k miles.
lifetime efficiency 3.3 mi kWh mixed summer and winter tires.
 
Is the author of API on this chat? I am wondering if its ok to show the graph to my neighbors who wants to get EV but worried about degradation.
 
I am sure the Home Assistant and LucidLogger can do this, but since I am too lazy to figure out how, I hacked a small script to retrieve only the battery capacity data. I run it once a day on my Raspberry Pi with the idea of making nice graphs once I collect some more data.

It script is based on vehicle_info.py from the python-lucidmotors repository.

import sys
import pathlib
import asyncio
import getpass
import rich
import logging
import time

# Allow running straight out of the repo
sys.path.insert(0, str(pathlib.Path(__file__).parent.parent.absolute()))

from lucidmotors import LucidAPI # noqa: E402

# logging.basicConfig(level=logging.DEBUG)

async def main():
async with LucidAPI() as lucid:
await lucid.login("...", "...")
await asyncio.sleep(1)
await lucid.fetch_vehicles()
res = lucid.vehicles
v = res[0]
vin = v.config.vin
bhealth = v.state.battery.battery_health_level
odometer = v.state.chassis.odometer_km * 0.621371
tstamp = v.state.last_updated_ms / 1000
cap = v.state.battery.capacity_kwhr
t = time.strftime('%F %H:%M:%S', time.gmtime(tstamp))
# rich.print(vin, bhealth, odometer, t) # lucid.vehicles)
print(f"{t} {vin} {bhealth:.2f} {odometer:.2f} {cap:.2f}")

asyncio.run(main())
 
95.8%
delivered ~14months back
~16k miles.
lifetime efficiency 3.6 mi kWh with 19" All season tires

Charging habits and history:
I charge mostly from ~20's% to 80%.
~4 times charged to 100%
1st year : 80% of the times used the 350kw Electrify Charging stations
California weather.
Charging Frequency: Weekly once

@Cosmo Cruz I am interested in learning your charging habits as the numbers looks impressive after 2 years. Please share if you are comfortable.

If others can share these details, may be we can find some patterns.
 
My touring is 22 months old with 29,800 miles on it. I have a lifetime mile/kWh of 3.7 and my battery health is at 94%. 19 inch tires. Still original tires too. I need to check if they need to be replaced soon.
 
Is it better conclusively to keep the car plugged in and charging back to 80% daily regardless of use or waiting until the battery level drops below 50%?
 
Is it better conclusively to keep the car plugged in and charging back to 80% daily regardless of use or waiting until the battery level drops below 50%?
If you’re gone a long time, it is best to set it to 50% and keep the car plugged in, regardless of where charge is now.
 
My Touring is 2.5 years old with 48kmiles. Had my battery replaced about 2,000 miles ago & it shows
Field 11, battery_health_level: 99.00000147521496.

Can I believe this ??????? If so, I'm going dancing' !!!!!
 
My Touring is 2.5 years old with 48kmiles. Had my battery replaced about 2,000 miles ago & it shows
Field 11, battery_health_level: 99.00000147521496.

Can I believe this ??????? If so, I'm going dancing' !!!!!
My brand new GT is 99.000% Dance away!💃 🕺
 
After 3.5 years and over 20k miles my battery health shows 93.6 but my kwhr capacity shows 105.8 kWh which assuming a 118kWh original capacity implies a 10.5% degradation. Not sure if that shows a discrepancy between battery health and capacity, but in any case I guess a 10% loss in 3.5 years isn't all that bad. Interestingly it also shows a range of 429 miles which is also the number I consistently get using my SOC and Miles showing on display and doing that calculation. Pretty sure that calculation of 429 miles is not accurate.
I think the max capacity is almost more telling. After 2 years my GT battery was replaced last June and max capacity was 101kwh. A year later I'm at max capacity 100.1 and when I charge to 80% I only have 80.119kwh available. So by my calculations I've lost ~15% of battery capacity but my battery health still reads 92.6%. I have to plan accordingly for trips because lifetime is 2.8mi/kwh so that means my GT can go about 280 miles and 250 if it's hot out.
 
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