I didn’t understand the 80% charging theory, recommend by Ather. I am 450+ Gen 2 owner. Vehicle has installed capacity of 2.9KWh & usable is just 2.2KWh. it means already only 75% capacity is available for usage. Even after this Ather has stopped fast charging at 80% & lowered charging after 80% in home charger also. I don’t understand why ? @tarun @abhishek.balaji you must allow fast charging till 100% for atleast Plus owners.
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This is done to increase the battery life, as they degrade faster at 100%. Idea is not to let them remain at 100% for longer duration.
That’s why in current optimized charging(v2) at home charging fast charging is done till 80% and then charging is paused. Then trickle charge starts to charge the battery 100% by 5 am. At home charging , optimized charging is optional and You can disable it from setting.
AFAIK limiting 80% charging at grid is done for following 2 reasons.
- Charging speed is faster till 100% and become slower after 80%. It will take much more time to charge from 80% to 100%.
- To increase availability and accessibility of chargers for all users.
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The 80% charging limit recommended by Ather, like many other electric vehicle (EV) manufacturers, is intended to maximize the lifespan and health of the 
1. Battery Health Preservation:
- Lithium-ion batteries, like the one in your Ather 450+ Gen 2, have certain characteristics that make them degrade faster when charged to 100% or discharged to 0% frequently.
- Charging to 80% helps prevent the battery from reaching the upper voltage limits, which can cause stress and lead to capacity loss over time. This prolongs the overall lifespan of the battery.
2. Usable vs. Installed Capacity:
- The installed capacity (2.9 kWh in your case) is the total capacity of the battery. However, to preserve battery health, manufacturers typically restrict the usable capacity (2.2 kWh) to prevent the battery from being fully charged or fully discharged.
- This buffer is normal across the EV industry and ensures that the battery remains within its optimal operational range.
3. Slowing Charging After 80%:
- Charging the battery beyond 80% tpically involves a tapering process where the charging speed is reduced. This is done to minimize heat generation and stress on the battery as it approaches full capacity.
- This reduction in charging speed is more pronounced at home or when using a fast charger to avoid putting additional strain on the battery cells as heat is one of the biggest factor to degrade the
4. Why Not Fast Charge to 100%?
- Fast charging generates more heat and stress on the battery, especially as it gets closer to 100%. By limiting fast charging to 80%, Ather is trying to balance the convenience of fast charging with the need to maintain battery health.
5. It’s all about Battery Longevity:
- it dose seem restrictive, but this approach is intended to give you a longer-lasting battery and better performance over the long term. If fast charging were allowed to 100%, the battery might degrade faster, reducing its overall lifespan and efficiency.
- if not ur battery won’t even last 5 years
the current practice is generally accepted as the best trade-off for ensuring battery health in EVs but I guess in 450+ there is a bit more room to play with
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Good info @syed.ishtiaq.apple . This can very well sit under FAQ batteries/charging section.
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I know the theory you are explaining. M just asking it for 450+ only, if you read the post
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@hemant0505dip oh then [quote=“marghoob.hasan, post:2, topic:291739”] AFAIK limiting 80% charging at grid is done for following 2 reasons.
- Charging speed is faster till 100% and become slower after 80%. It will take much more time to charge from 80% to 100%.
- To increase availability and accessibility of chargers for all users. [/quote]
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By the time we observe severe battery degradation, the vehicle itself would have become outdated. And the installed and usable capacity already ensures that we never charge our battery fully to 100%. So why reduce charging and suffer from range anxiety?
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Just dont over think this,go 100% once a week let the cells balance if you are a frequent charger my 450x lasts me a week+ easily.Charging after 80 is very slow and there so many cells it will barely put a dent in 7 year ownership atleast
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Every day I exactly use 55% of the battery.
Is it wise to keep the vehicle charged for 100 % every night ? At home charging ? Which always shows me will be 100% charged by 5AM.
Is slow charging daily for 100 % is good ?
Oh absolutely
we have a good amount of buffer cells we don’t have to even worry about it plus if it’s a slow charging even better ezy 5+ years But chemical ageing is something we cannot avoid Keeping the charge cycles less and slow charging will extend ur battery life if u compare it with a person who casually charges on Ather grid (fast charges)
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