Ideal charge %?

[Outdoors]

Yeah those silly battery geeks, like Dr Dahn and JB Straubel, do nothing to help EV growth...

It is actually people on forums that misinterpret the data and spread the best is BS. Nope the best is use the battery. Don't stare at it. Those are the geeks that F it up. They have nothing else to do.

Calendar aging is important. Which means if you sit one never gets use. AKA garage queen.

Then local suburban mom never buys an EV. As business insider reads the BS.

Sponsored

 

[BannedByTMC]

Nope the best is use the battery. Don't stare at it. Those are the geeks that F it up. They have nothing else to do.

As if the general public pay attention to the "geeks" on a forum. Using the battery in the proper and most practical way is "best", that allows a range of options for individual use cases. There are better and worse ways to use a pack, simple as that.

 

[Outdoors]

As if the general public pay attention to the "geeks" on a forum. Using the battery in the proper and most practical way is "best", that allows a range of options for individual use cases. There are better and worse ways to use a pack, simple as that.

Yes they do. Pay attention. To write half baked articles, by half baked internet artists. Trying to be the biggest dude or dudette on a forum. Often cited by Business Insider. Yet one's handle might lead to non inclusiveness in that world.

 

[DMenace66]

the 50% thing basically comes from the idea that the lower the state of charge the battery is kept at, the more cycles it can undergo without significant degradation. There was a graph i read somewhere a while ago that describe the ideal SOC of a Li Ion battery is something like 30-70% daily, the study found that batteries that were kept in that SOC range could undergo many many more cycles without significant degradation.

tesla has put a whole lot of resources into Battery Management, and so they have determined that if your goal is to achieve maximum longevity from the battery, but also maximize useful range, the best balance between the two is 80%

if you only drive like 100 miles a day however, you can further increase battery longevity (cycles before significant degradation) by keeping the battery at a lower SOC range.

hope this helps.

I'm a new CT owner with the UMC charging at base level 120V 1.2kW 12A.
In consideration of these 2 thumb rules:
1) plug it in every day
2) 50% SOC daily set point maximizes the number of charge cycles before degradation,
Then,
For low mileage drivers like myself, who drive 5-20mi a day, with an occasional "long" 70-80 round trip once a week, would you say it's best to
a) start my average day topped of at 50% SOC and plug it in everyday, even if the charge level is way above the 20% target recharge level? and
b) if I have an impromptu long commute day, and the outbound leg brings my SOC down significantly to 25%, should I charge up to a slightly higher target, say 60%, so that on the return leg when I arrive home, I can avoid a charge cycle and let the car sit overnight, above 50%, ready to go in the morning?

 

[JCERRN]

I'm a new CT owner with the UMC charging at base level 120V 1.2kW 12A.
In consideration of these 2 thumb rules:
1) plug it in every day
2) 50% SOC daily set point maximizes the number of charge cycles before degradation,
Then,
For low mileage drivers like myself, who drive 5-20mi a day, with an occasional "long" 70-80 round trip once a week, would you say it's best to
a) start my average day topped of at 50% SOC and plug it in everyday, even if the charge level is way above the 20% target recharge level? and
b) if I have an impromptu long commute day, and the outbound leg brings my SOC down significantly to 25%, should I charge up to a slightly higher target, say 60%, so that on the return leg when I arrive home, I can avoid a charge cycle and let the car sit overnight, above 50%, ready to go in the morning?

I think the answer is that you should try your best to maintain a SOC between 20-80%, if your goal is longevity. The general rule of thumb is that going above 80 and below 20 can “age” the battery faster.

this is the video i was referring to:

 

[DMenace66]

Thanks, I've seen this video before... However after watching pieces of it
again, I'm leaning towards the 50% SOC with a narrow band depth of discharge of 20%. I’m thinking if I set my max state of charge at 60%, and then trickle charge back up when I reach 40%, that’ll give me 150 miles of range that I can used to make a 2 hour return trip on the spur of the moment, as well as maximize the number of charging cycles the battery can withstand for max battery life.

 

[MyOtherTruck]

I am keeping mine at 50%. I have it plugged into a standard outlet and have it charge overnight. I dont drive it often. More my weekend car. So it charges a few miles a day (because of sentry or overheat protect). In the super cold winter, itll be kept outside and I am curious to see how I will need adjust charging (e.g. will it deplete more or use alot more to condition pre drive etc). Will be fun to measure and report back.

 

[igs]

I am keeping mine at 50%.

50% is a good upper limit to set.

Tesla recommends 15% - 50%

Tesla: "To maintain service life, the battery pack should be stored at a state of charge (SOC) of 15 to 50%."

Sponsored