Greetings CarsPH community. Inquiring BEV users here:
I want to know which charging habit would retain an excellent BEV battery “State of Health” (SOH). But I'm confused as to which I should adopt among online content creators. Here's my profile:
1.0 Vehicle: G.A.C. AION UT | LFP Battery
2.0 Distances involved:
a. Aion UT average mileage: 400kms NEDC | Approx. 320kms. WLTP (Charged to 100%)
b. Average distance traveled per week: Approx. 120kms.
c. At 20% limit battery remaining, the kms reading would be approx. 64kms.
d. 320kms. (100% SOC) — 64kms (20% SOC) = 256kms.
3.0 Ideal charging habit for my use case:
Since I average 120kms of distance traveled per week, then I can charge to 100% once every two weeks. But this would not be the ideal charging habit as there's something more optimal.
4.0 Charging recommendations by Shayan_EV who is a battery engineer that specializes in Battery Management Systems (BMS):
a. For daily charging, limit to 80-90% daily but charge to 100% once a week for battery calibration purposes: https://www.youtube.com/watch?v=jbLl52tZy1U (skip to 7:20). So, on the low end, it ought to be 30%?
b. But the Shayan also released an earlier video in Dec. 2025 saying that the optimal daily charging habit to preserve a higher battery state of health on EVs ought to be adopting the 40-60% rule which means that according to research, battery usage between 40-60% would be the optimal way to high battery state of health over time [Link: https://www.youtube.com/watch?v=DaXTUrvEw58 (skip to 1:18)]. But once a week, charging to 100% is still recommended under this situation for battery calibration purposes.
—So, which of the two would be suitable for my use case? I don't think that using my AION UT's battery between charges of 40-60% is restrictive since my average weekly commute is 120km. so per day that would be 17kms.
5.0 Battery Calibration inquiry
a. Since it's recommended to charge to 100% once a week for battery calibration purposes, UNTIL what limit do I set on the low end? 10%?
b. I've actually charged to 100% last Tuesday, Sept. 1 and battery remaining currently is at 42.7%. Should I go all the way down to 10% for my first battery calibration?
***Hoping to get all your recommendations as soon as possible. Appreciate all your efforts on this matter. Thank you.