[nkef]

H all,
I have my new ID.3 a few weeks now, and i have some battery charging related questions.
I am using on daily base about 30-33% of the battery for work commute , so the workdays I charge the it daily from 47-50 up to the suggested 80%.
I was of the lucky ones in Greece that got the free ID.Charger for the first 100 orders, but until the wallbox was installed I was using a (10A, 2.2kW)/(16A 3.5kW)type-2 charger that I got for trips. The charger could easily charge the ID.3 about 48% of battery at 16A in 8 hours. Now with the installed wallbox I can charge with 11kW or about 5.2kW with the reduced AC charging current option.

I have the following questions , which is the best strategy for battery charging , should I charge it every two days from about 14-20 to 80 or daily from 47-50 to 80?
Moreover , which charging power is best for battery longevity? The 3.5kW, the 5.2kW or the 11kW or does not really matter at that rates?
Also during charging the battery cooling system is enabled (during hot days i suppose) , with slow charging rates the cooling system may work for many hours (during hot days), is that bad for the cooling system ?

 

[Huey52]

Congratulations on your new ID.3 and Welcome to the forum!

Should I charge it every two days from about 14-20 to 80 or daily from 47-50 to 80?
- I continue to go back and forth on this myself. At the moment I haven't charged in several days (still well above 40%). But there have been other stretches where I "always be charging" (ABC). In theory Li-ion batteries are better off discharging to 40% and then being charged to 80%. VW recommends only charging to 80%.
Your daily/weekly use pattern is really the more determining factor.

Moreover, which charging power is best for battery longevity? The 3.5kW, the 5.2kW, or the 11kW, or does not really matter at that rates?
- Doesn't matter. These are all 240V Level 2 (L2). May as well charge at or as close to the vehicle's 11kW as you can, as long as your home's infrastructure can accommodate same. You may have utility company peak rates to consider however.
DC Fast charging is a consideration in battery longevity. VW does not recommend continuous use of Electrify America here, even tho' they 'Catch 22' offer same free for 3-years.

Also during charging the battery cooling system is enabled (during hot days i suppose) , with slow charging rates the cooling system may work for many hours (during hot days), is that bad for the cooling system?
- The cooling system was designed to do this job, even in very hot and warming in very cold climes, over extended periods. As any vehicle component the more you use it the sooner it will require maintenance/replacement, but vehicles are meant to be used.

 

[nkef]

Congratulations on your new ID.3 and Welcome to the forum!

Should I charge it every two days from about 14-20 to 80 or daily from 47-50 to 80?
- I continue to go back and forth on this myself. At the moment I haven't charged in several days (still well above 40%). But there have been other stretches where I "always be charging" (ABC). In theory Li-ion batteries are better off discharging to 40% and then being charged to 80%. VW recommends only charging to 80%.
Your daily/weekly use pattern is really the more determining factor.

Moreover, which charging power is best for battery longevity? The 3.5kW, the 5.2kW, or the 11kW, or does not really matter at that rates?
- Doesn't matter. These are all 240V Level 2 (L2). May as well charge at or as close to the vehicle's 11kW as you can, as long as your home's infrastructure can accommodate same. You may have utility company peak rates to consider however.
DC Fast charging is a consideration in battery longevity. VW does not recommend continuous use of Electrify America here, even tho' they 'Catch 22' offer same free for 3-years.

Also during charging the battery cooling system is enabled (during hot days i suppose) , with slow charging rates the cooling system may work for many hours (during hot days), is that bad for the cooling system?
- The cooling system was designed to do this job, even in very hot and warming in very cold climes, over extended periods. As any vehicle component the more you use it the sooner it will require maintenance/replacement, but vehicles are meant to be used.

Thank you for your reply.
For my use I prefer to charge it daily so if i need the car again the same it would have plenty of battery left. My home has 25kVA three phase power connection so both 3.5kW and 11kW chargers are well supported.
I will experiment with the 3.5kW and the 11kW chargers and the battery cooling system,when it is running and when it is not. I will get back when I have some conclusion.

 

[ChristophW]

I second @Huey52 's recommendation and your conclusion. Just charge every day and don't worry. It is what I do, with far fewer kilometers per day than you have. Happy driving in Greece, some day I will make it back there for a vacation too.

 

[Ray Noneya]

Hi All I fly a drone and have around 5 videos on my page of the Lordstown GM battery plant under construction over the last year. Also have one of the Lordstown motors trucks in action.. Take a look https://www.youtube.com/c/RayNoneya/videos

 

[Huey52]

Not sure what this has to do with the OP's VW ID.4 battery charging questions and subsequent related discussion.

But it's good to see the GM plant coming along, as they will provide batteries to many manufacturers within/outside of GM, furthering EV development and sales.

A discrete thread might have been the better course of action.

Hi All I fly a drone and have around 5 videos on my page of the Lordstown GM battery plant under construction over the last year. Also have one of the Lordstown motors trucks in action.. Take a look https://www.youtube.com/c/RayNoneya/videos

 

[Eric (Oregon)]

I have found numurous recomendations that say " do not let your batteries go below 30 percent" before charging. I also found this> A battery expert on a Tesla forum (with a PhD in electromechanical engineering) recommends keeping your state of charge between 15% and 90%, others 25%-75%, but advice varies. Some say 20%-80%, but fundamentally, the rule is don’t overcharge it or let it go completely flat.
The "advice varies" is a concern...

 

[VW TECHNICIAN]

I would do in your scenario 30-70%....and since you are living in warm location.... doing it daily is not bad at all on L2 chargers....and if sometimes you have no need to go for 70% ...lower the battery screen to less than what you already have on SOC...and plug it in so it keeps battery pack at lower temperature and if needed use power from L2 instead of battery pack for temperature management. So always keeping plugged in even you don't have need for charging will help with battery pack management temperature in hot weather and cold weather conditions.

 

[VW TECHNICIAN]

I have found numurous recomendations that say " do not let your batteries go below 30 percent" before charging. I also found this> A battery expert on a Tesla forum (with a PhD in electromechanical engineering) recommends keeping your state of charge between 15% and 90%, others 25%-75%, but advice varies. Some say 20%-80%, but fundamentally, the rule is don’t overcharge it or let it go completely flat.
The "advice varies" is a concern...

Recommendation greatly varies with what type of chemistry is discussed and how battery management is tuned....

 

[ChristophW]

You will have to relax a little and find your own sweet spot.
My own: It is ok to occasionally charge to 95-100% in preparation for a road trip. It is also ok to occasionally discharge to single digits, mostly during such longer road trips. For day to day use I keep the car between 20% and 80%.
I find it stupid to not use the full battery capacity when needed out of fear of hurting the battery. Also, it is important to note that VW left a bit of buffer at both ends, which means that 0% and 100% displayed is not what the battery could actually do, and that protects it from the worst "abuse".