Charging UX300e

[PPD]

Views on using the option to charge to 90% rather than 100% please.

Presumably Lexus offer this for a reason, but would it really improve Battery life? The 10 year warranty for the Battery doesn't mention patterns of use.

[rayaans]

3 minutes ago, PPD said:

Views on using the option to charge to 90% rather than 100% please.

Presumably Lexus offer this for a reason, but would it really improve battery life? The 10 year warranty for the battery doesn't mention patterns of use.

Should improve Battery life yes. 

I've usually just maxed it out however. 

[NemesisUK]

Tesla focused but this is an interesting take on the charge level debate

https://cleantechnica.com/2021/05/01/should-i-charge-my-tesla-to-80-or-90-or-100/

 

[Chris UXe]

Hope you're pleased with your car Patrick! We also charge to 100% using our home wall box and after nearly a year of ownership have noticed no Battery issues. The main factor in shortening Battery life (i.e. capacity) is rapid charging, which is why you're safe to charge to 100% using a non-rapid charger, such as a home wall box (or three-pin plug).

Even for rapid charging, the charging software on the vast majority of rapid chargers automatically reduces the charge rate above about 80% in order to avoid Battery over-heating or too much energy input trying to go into too little available charging "space". 

So I wouldn't worry about keeping the charge to a maximum of 90%. That said, many home wall boxes (and rapid chargers too) allow you to select a maximum charge, so if you don't need every last mile of available range, you can set the maximum charge to, say, 90%.

 

[ColinBarber]

If you don't need 100% range then stay away from charging to 100%, especially letting the vehicle sit at 100% state of charge - Lithium batteries don't like it. It isn't going to massively affect the Battery, not enough to qualify for a Battery replacement, but it will accelerate Battery ageing which will slowly reduce maximum range.

There is quite a lot of research that suggests not going above 60% to minimise calendar ageing, but that isn't practical or convenient for the vast majority of EV owners.