ldallan wrote:* always use Level-2 6.6 kWh charging (220v - 240v) going from 20% to 80%
* never use DCFC (DC fast charging)
* never allow battery SOC to go under 20% (don't drain to LBW low battery warning or VLBW very low battery warning or "Turtle" or 0%)
* mild temperature like San Francisco or Ireland that don't get all that cold or that hot (mostly between 40°F to 80°F)
Contrasting to the above "best practices" to "non-optimal practices" that I've read on this and other forums:
* charging to 100%
* using DCFC fast charging
* freeway speeds in high heat like Texas or Arizona summers
* draining battery down to LBW, VLBW, or Turtle
We have owned our Leaf 2015 only for a bit over two months now, so I am still quite clueless about how to best take care of its battery to make it last as long as possible... it doesn't seem easy to find solid evidence on which charging practices are good/bad in terms of battery degradation.
In these couple of months I have used the CHAdeMO quick charging only once, the day I bought the car because I had to travel 80km on the highway (80-100 km/h) from the previous owner's city to ours, and the trip ended up using about 65% of battery charge. LeafSpy showed that the car had had 52 quick charges, and about 1100 T1/T2 charges.
Since that day, I've only slow-charged it from the home socket. I use only about 20% of battery charge on a regular working day (about 25-30km trip) so in the first weeks I basically charged it twice a week, plugging it whenever I went down to close to 20% and then charge it 4-5 hours up to around 80%. Then I noticed that the EVSE plug was getting quite hot, and changed my charging habits to 1-2 hours (almost) every day. Is this any good or bad?
A few fumbles I'm guilty on:
- I have this US EVSE that is not supposed to be used at 240V European voltage, I am looking forward to buying a proper EU-compliant EVSE; I don't think this has an effect on battery degradation, but there is a risk of hazard (although it's been used for 1-2 years by the previous owner)
- one day I totally forgot to unplug it
so it reached 100%; eventually I drove it the next morning but it stayed at 100% during the whole night
- twice I got lost (thank GPS) while the charge was already quite low, and by the time I got home I was in LBW state, but never got to VLBW or Turtle
We live in a very cold country (Finland), and we're scared to venture farther than 50km from our town until spring. When the really cold weeks come, I am planning to just take a bus if the temperature drops below -15C