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Charging to 100%

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941 views 18 replies 13 participants last post by  Ken Gillam  
#1 ·
I read somewhere that 80% is the standard charge but once a month charge to 100%. Is that right? Any ideas please? Thank you in advance.
 
#5 ·
My take is slightly different. I think the hundred percent every now and then is an historic requirement or for LFP batteries currently.
From what I have gathered from watching several presentations about EV batteries ideally 75% is the value you should stay under for longevity reasons if you can.
I tend to charge to 70% for most of the time and when I need a greater range I just charged to 100. This seems nowadays to increase the lifespan of the battery but mainly after its life in the electric vehicle. Studies are really showing that even if you charge 100% every time even though this does have detrimental effects on the battery that builds up over time, the car will dissolve in rust before these issues with the battery become a problem.

.sjb
 
#7 ·
My take is slightly different. I think the hundred percent every now and then is an historic requirement or for LFP batteries currently.
From what I have gathered from watching several presentations about EV batteries ideally 75% is the value you should stay under for longevity reasons if you can.
I tend to charge to 70% for most of the time and when I need a greater range I just charged to 100. This seems nowadays to increase the lifespan of the battery but mainly after its life in the electric vehicle. Studies are really showing that even if you charge 100% every time even though this does have detrimental effects on the battery that builds up over time, the car will dissolve in rust before these issues with the battery become a problem.

.sjb
Many thanks for your advice.
 
#6 ·
One thing to consider here?
Do you plan to keep the car more than 8 years?
If not, then don't overthink it. As you are still in battery warranty period, unless you are in 100K+ miles.(not sure on exact mileage)

Add in when you see 10 year old Leafs or Soul's still with good battery % after 10 years with no thermal management.

Worrying about battery is something low down on the list.
 
#8 ·
I always charge to 100%, as I wouldn't want to get caught out having to unexpectedly do a journey requiring full range. In any case, I believe the battery management system maintains a buffer to protect from overcharging. And if charging to 100% was such a threat, then Kia would have taken steps to actively warn us.
 
#10 ·
This was stated in my Niro EV manual, but isn't in the EV3. Apparently the new design/new generation batteries can be happy charged to 100%. However, I still only charge to 100% if going on a long journey, or once a month as that is the habit I got into.
As iooi says, with the 8 year warranty on the battery (subject to the terms attached to that) and the real world life of older batteries, I wouldn't worry to much about it. Just enjoy the car
 
#18 ·
The battery warranty is only for 70% original capacity. My dealer did in fact mention charging to 80% unless you need the max range. Previous car, a Mini, it was never mentioned at point of sale. The trouble with saying I charge to 100% and it doesn't cause any problems is that it's still very early days. However I've no idea what best practice is and would welcome clearer statements from Manufacturer's. Personally I charge to 80% as that is more than enough for my typical journeys, but who knows, that might not be necessary.
 
#19 ·
Batteries don't like being held at a high state of charge for long periods, so as a general rule charge to 80% or if a long trip tomorrow then 100%. However at rapid DC chargers it is good practice to only charge to 80% as the charge rate drops significantly after that so much better to move on and charge again later in the journey if needed. It will take as long to go from 80 to 100 as it did from 10-80%, so rather than hog a charger that others may need, your journey will be quicker to move on and charge again later.