- Jul 3, 2021
- Reaction score
- Houston, TX
- CT4S 2022 Mini Cooper S 2024 Electric in 2025/6
Your battery will be fine if left in the 70s-lower 80s for regular short periods but might just fare better if typically only in the upper 60s-70s as highest SoC. Obviously for longer storage periods (weeks) you should target mid-50s or even lower SoC as per manual etc.So I watched the video on 3 big mistakes for charging. The one I found interesting was better to do a lot of little charges than letting your battery drain and do bigger charges.
I’m not going to operate in the 40-60 percent range. Seems pointless. But my question is whether it’s better to do a bunch of little chargers from let’s say 60 - 85 (as recommended in manual) or let it drop down to the 20s or 30s before charging back to 85 percent? Is it fine for the the battery to always be in that higher charge state?
The second vid def recommends frequent 'top-up' charges and a preferred SoC somewhere in 60s-70s for more optimal long term Soh preservation - this is what I am now doing - my driving stats entirely different now that I am retired but even then it would be no issue (as long as you have access to an at home EVSE) really to get in the habit of the 'top-up' strategy vs longer 20 to 85% charge sessions that I had been doing previously.
Again, the gross differences here are probably in reference to VERY long term battery degradation trends so for many I suspect it simply won't be that big of an issue. The exception might be as in my case for cars in very hot climates where we see greater Soh degradation rates.
Finally, with the 'top-up' strategy, once in a while (every couple months?) doing a 're-balancing' procedure as discussed here and elsewhere (e.g. drawing down to 10 or lower, followed by a 100% charge and very soon after back down to 20+ Soc and charge back to say ca 80) will invariably 'boost' i.e. rebalance the Soh by a couple/few percentage pts.